Description

API 16C Choke and Kill Hose for BOP, Drilling Spool & Choke Manifold Applications

SGPE supplies API 16C Choke and Kill Hose assemblies for high-pressure drilling and well control systems. These flexible pressure-containing lines connect critical equipment such as the BOP stack, drilling spool, choke manifold and kill manifold while allowing controlled movement between rigid components.

Typical project requirements include 5,000 PSI, 10,000 PSI and 15,000 PSI, together with selected 20,000 PSI Choke and Kill Hose configurations. Common hose I.D.s range from 2″ to 4″, depending on the pressure class and qualified hose design.

Projects can specify FSL 0, FSL 1, FSL 2 or FSL 3, custom overall lengths, different End A and End B connections, H2S / sour-service requirements, high-temperature service, project-specific fire protection and stainless steel external armor.

Depending on the installation position, the same product may also be described as an API 16C Flexible Choke and Kill Line, Flexible Choke Hose, Flexible Kill Hose, BOP Choke Hose, BOP Kill Hose, High Pressure Choke Hose, High Pressure Kill Hose, Choke Manifold Hose, Kill Manifold Hose, Drilling Spool Choke Hose, Drilling Spool Kill Hose or Well Control Hose.

SGPE treats the hose as part of the complete well control system rather than as an isolated component. Technical review can cover the BOP pressure class, drilling spool outlets, choke and kill manifold interfaces, hose routing and both end connections before the final assembly is confirmed.

This approach supports land and offshore drilling contractors, oil and gas operators, rig manufacturers, EPC companies, well control contractors, BOP service companies, oilfield distributors and MRO buyers.

For an accurate API 16C Choke and Kill Hose quotation, provide the working pressure, hose I.D., FSL, overall length, End A, End B, operating temperature, working medium, H2S requirement and installation layout.

Email: info@sgpe.com
Tel / WhatsApp: +86 186-1599-5239

Product at a Glance

Item	Typical Project Requirement
Product	API 16C Choke and Kill Hose
Product Type	Flexible Choke and Kill Line
Standard	API Spec 16C
Main Service	BOP choke line / BOP kill line
Working Pressure	5,000 / 10,000 / 15,000 PSI; selected 20,000 PSI
FSL	FSL 0 / FSL 1 / FSL 2 / FSL 3
Common Hose I.D.	2″, 2-1/2″, 3″, 3-1/2″, 4″, depending on configuration
Overall Length	Custom according to equipment layout
Minimum Bend Radius	According to qualified hose design
End Connections	Flange, hub or approved project-specific termination
Working Media	Drilling mud, kill fluid and specified wellbore fluids
Sour Service	H2S / CO2 configuration according to project requirements
External Protection	Project-specific fire protection or stainless steel armor
Typical Equipment	BOP, drilling spool, choke manifold, kill manifold

Selection Note: The approved SGPE datasheet, drawing and purchase specification govern the final hose assembly. Working pressure alone does not determine the correct API 16C hose.

What Is a Flexible Choke and Kill Line?

An API 16C Choke and Kill Hose is a flexible high-pressure line installed within the BOP and choke-and-kill pressure-control circuit.

It performs a different function from an API 7K drilling hose. API 7K Rotary and Vibrator Hoses mainly carry drilling mud during normal circulation, while an API 16C Flexible Choke and Kill Line forms part of the well control system.

During a kick or another well control event, the drilling crew needs controlled flow paths to manage wellbore pressure.

The choke line carries wellbore fluid from the BOP stack or drilling spool toward the choke manifold, where the choke equipment controls flow and backpressure.

The kill line provides a high-pressure path for pumping weighted drilling mud or another specified kill fluid toward the BOP and well.

Rigid piping works well where equipment remains fixed and aligned. Drilling rigs, however, experience vibration, repeated rig-up, dimensional variation and structural movement. A flexible choke or kill line accommodates this controlled movement while maintaining the required pressure-containing flow path.

Correct selection therefore considers the working pressure, hose I.D., FSL, minimum bend radius, overall length, End A and End B, operating temperature, service medium, H2S conditions and actual installation geometry.

Choke Hose vs. Kill Hose

Item	Choke Hose	Kill Hose
Typical Flow Path	BOP / drilling spool → choke manifold	Kill manifold / pump → BOP / drilling spool
Main Function	Routes well flow toward the choke system	Pumps kill fluid toward the well
Typical Media	Drilling mud, formation fluid, gas-cut mud, wellbore fluid	Weighted drilling mud / kill fluid
Main Equipment	BOP, drilling spool, choke manifold	Kill manifold, pumping circuit, BOP
Common Product Term	BOP Choke Hose / Flexible Choke Line	BOP Kill Hose / Flexible Kill Line
Main Selection Focus	Pressure, FSL, abrasion, H2S, length, ends	Pressure, bore, FSL, length, ends

A BOP Choke Hose carries wellbore fluid toward the choke manifold, while a BOP Kill Hose carries kill fluid toward the well.

The hose construction can be similar, but the installation position, flow function and connected equipment differ. Every RFQ should therefore identify the required assembly clearly as either a Choke Line or Kill Line.

Technical Specifications

Technical Parameter	Typical Range / Configuration
Standard	API Spec 16C
Product Type	Flexible Choke and Kill Line
FSL	FSL 0 / FSL 1 / FSL 2 / FSL 3
Rated Working Pressure	5,000 / 10,000 / 15,000 PSI; selected 20,000 PSI
Metric Pressure Reference	Approx. 34.5 / 69 / 103.5 / 138 MPa
Typical Hose I.D.	2″ / 2-1/2″ / 3″ / 3-1/2″ / 4″, depending on configuration
Test Pressure	According to approved pressure class and hose design
Minimum Burst Pressure	According to qualified hose design
Minimum Bend Radius	Design-specific
Overall Length	Custom
Inner Liner	Selected for fluid, temperature and abrasion
Reinforcement	High-pressure multi-layer reinforcement
Outer Protection	Oilfield-service protective construction
External Armor	Available where specified
End Termination	Flange, hub or approved project-specific connection
End A / End B	Same or different configurations
Operating Temperature	According to approved project datasheet
Sour Service	H2S / CO2 requirement reviewed separately
Offshore / Subsea Service	Subject to project-specific engineering review
Inspection	According to PO / ITP
Third-Party Inspection	Available when specified
Documentation	Datasheet, drawing, test and inspection records

Working Pressure, Test Pressure & Burst Pressure

Pressure class is one of the first selection points for a High Pressure Choke and Kill Hose, but pressure alone does not define the assembly. The hose must also suit the connected BOP and manifold equipment, bore size, FSL and actual service conditions.

Rated Working Pressure	Metric Reference	Test Pressure	Minimum Burst Pressure
5,000 PSI	Approx. 34.5 MPa	7,500 PSI	11,250 PSI
10,000 PSI	Approx. 69 MPa	15,000 PSI	22,500 PSI
15,000 PSI	Approx. 103.5 MPa	22,500 PSI	33,750 PSI
20,000 PSI	Approx. 138 MPa	30,000 PSI	45,000 PSI

These figures provide project references. The final approved datasheet controls the technical requirement.

A 3 Inch 10000 PSI Choke Hose, for example, still requires the correct FSL, temperature range, overall length, end connections and minimum bend radius.

Likewise, a 15K FSL 3 Choke and Kill Hose must match the pressure class and interfaces of the BOP, drilling spool and manifold system.

Reference Hose Size & Minimum Bend Radius Matrix

Minimum Bend Radius, or MBR, does not have one universal value for every API 16C hose. The qualified hose construction determines the final limit.

Hose I.D.	Working Pressure	Test Pressure	Min. Burst Pressure	Reference MBR
2″ / 50.8 mm	5,000 PSI	7,500 PSI	11,250 PSI	900 mm
2-1/2″ / 64 mm	5,000 PSI	7,500 PSI	11,250 PSI	1,000 mm
3″ / 76.2 mm	5,000 PSI	7,500 PSI	11,250 PSI	1,000 mm
3-1/2″ / 89 mm	5,000 PSI	7,500 PSI	11,250 PSI	1,100 mm
4″ / 101.6 mm	5,000 PSI	7,500 PSI	11,250 PSI	1,200 mm
2″ / 50.8 mm	10,000 PSI	15,000 PSI	22,500 PSI	1,000 mm
2-1/2″ / 63.5 mm	10,000 PSI	15,000 PSI	22,500 PSI	1,100 mm
3″ / 76.2 mm	10,000 PSI	15,000 PSI	22,500 PSI	1,150 mm
3-1/2″ / 89 mm	10,000 PSI	15,000 PSI	22,500 PSI	1,200 mm
4″ / 101.6 mm	10,000 PSI	15,000 PSI	22,500 PSI	1,250 mm
2″ / 50.8 mm	15,000 PSI	22,500 PSI	33,750 PSI	1,000 mm
2-1/2″ / 63.5 mm	15,000 PSI	22,500 PSI	33,750 PSI	1,150 mm
3″ / 76.2 mm	15,000 PSI	22,500 PSI	33,750 PSI	1,200 mm
2″ / 50.8 mm	20,000 PSI	30,000 PSI	45,000 PSI	900 mm
2-1/2″ / 64 mm	20,000 PSI	30,000 PSI	45,000 PSI	1,100 mm
3″ / 76.2 mm	20,000 PSI	30,000 PSI	45,000 PSI	1,200 mm

Engineering Note: Confirm the final MBR, hose O.D., assembly weight and end-fitting dimensions against the approved SGPE project datasheet before installation.

5K, 10K, 15K & Selected 20K Configurations

5,000 PSI Choke and Kill Hose

A 5000 PSI Choke and Kill Hose suits many conventional land-rig and surface well control systems.

Common project requirements include 2″, 3″, 3-1/2″ and 4″ hose I.D.s, depending on the required flow area and manifold design. A 5K assembly can also require a custom overall length, H2S service or different connections at each end.

10,000 PSI Choke and Kill Hose

A 10000 PSI Choke Hose serves high-pressure BOP, drilling spool and manifold systems.

Typical requirements include a 2″ 10K Choke Hose, 2-1/2″ 10K Kill Hose, 3″ 10000 PSI Choke and Kill Hose or 4″ 10K Flexible Kill Line.

At this pressure level, FSL, MBR, connection geometry, operating temperature and hose routing need careful review.

15,000 PSI Choke and Kill Hose

A 15000 PSI Choke and Kill Hose supports deep-well and high-pressure drilling programs.

Common configurations include 2″, 2-1/2″ and 3″ hose I.D.s, depending on the qualified design. Projects can also specify FSL 3, H2S service, custom end terminations and enhanced inspection requirements.

Selected 20,000 PSI Choke and Kill Hose

Selected ultra-high-pressure projects can require a 20K Flexible Choke and Kill Line.

Because bore size, FSL, operating temperature, end connections and routing all affect the final configuration, provide the complete project specification before requesting a 20K quotation.

FSL 0, FSL 1, FSL 2 & FSL 3

FSL means Flexible Specification Level.

API 16C Flexible Choke and Kill Line projects can specify FSL 0, FSL 1, FSL 2 or FSL 3. The operator, drilling contractor or EPC normally defines the required level in the project specification.

FSL should follow the actual requirement rather than an assumption that a higher number automatically represents the correct choice.

When a project requires an FSL 3 Choke and Kill Hose, identify FSL 3 during the RFQ stage so the pressure class, hose design, inspection requirements and documentation scope can be reviewed together.

Pressure, FSL and operating conditions should always be treated as one selection package.

Hose Construction & Protection Options

Fluid-Contact Inner Liner

The inner liner contacts drilling and wellbore fluids directly, so the service medium plays an important role in hose selection.

Water-based mud, oil-based mud, weighted kill fluid, formation fluids, gas-cut mud, barite, drilled solids, H2S, CO2 and operating temperature can all affect liner requirements.

Choke service can also expose the hose to high fluid velocity and abrasive solids. For severe service, provide available mud density, solids information and fluid composition during technical review.

High-Pressure Reinforcement

The reinforcement carries the internal pressure load while maintaining controlled flexibility.

Two hoses with the same nominal I.D. can use different constructions when pressure rating, FSL, temperature or operating conditions change.

Outer Protection

The outer construction protects the pressure-containing hose during handling and oilfield operation.

Projects that expose the line to structural contact, repeated rig handling or harsh offshore conditions can require additional external protection.

Project-Specific Fire Protection & Armor

Some projects specify additional fire protection or stainless steel external armor.

Fire protection should follow the operator or project specification. Stainless steel armor also needs separate review because it changes hose O.D., weight, flexibility and support requirements.

Both should be considered together with the MBR and final installation route.

End Terminations

End terminations transfer pressure and mechanical loads between the flexible hose and rigid equipment.

End A and End B therefore form part of the complete pressure-containing assembly and require proper interface review.

If a project specification defines bonded or non-bonded construction, bore construction or another specific hose design, include that information in the RFQ rather than assuming it from the product name.

Typical Well Control Applications

Oilfield Application	Typical Product Term	Main Selection Focus
BOP Choke Outlet	BOP Choke Hose	Pressure, fluid and manifold interface
BOP Kill Outlet	BOP Kill Hose	Pressure and kill circuit
Drilling Spool Choke Outlet	Drilling Spool Choke Hose	Connection geometry
Drilling Spool Kill Outlet	Drilling Spool Kill Hose	Pressure and flow
BOP to Choke Manifold	BOP-to-Choke Manifold Hose	FSL, length and routing
Kill Manifold to BOP	Kill Manifold Hose	Pressure and connection
Land Drilling Rig	Oilfield Choke Hose	Vibration and rig-up tolerance
Jack-Up Rig	Offshore Choke Hose	Movement and environment
Fixed Offshore Platform	Offshore Flexible Choke Line	Environment and documentation
High-Pressure Well	10K / 15K Choke Hose	Pressure and FSL
Sour Well	H2S Choke Hose	H2S, CO2 and materials
Abrasive Mud Service	Abrasion-Resistant Choke Hose	Liner and solids
BOP Upgrade	Custom API 16C Hose	New equipment interfaces
Rig Refurbishment	Replacement API 16C Hose	Existing geometry
Scheduled MRO	Replacement Choke Hose	Identification and fit
EPC Well Control Package	Project-Specific Flexible Line	Datasheet, ITP and MDR

Land, Offshore & Harsh-Service Applications

Land Drilling Rigs

Land rigs often use Flexible Choke and Kill Lines where rigid piping cannot easily accommodate BOP vibration, repeated rig-up, manifold positioning or equipment alignment.

The hose may connect a drilling spool to the choke manifold, connect the kill circuit to the BOP stack or provide a flexible interface after a BOP or manifold upgrade.

For these installations, review the equipment arrangement before finalizing the hose length and end connections.

Offshore Drilling

Offshore projects introduce additional movement, environmental exposure and documentation requirements.

A jack-up rig or fixed offshore platform may use an Offshore Choke and Kill Hose between surface BOP equipment and the choke or kill manifold. Replacement projects may also require the new hose to follow the existing route, support arrangement and connection orientation.

For dynamic or subsea applications, provide the complete engineering specification. External pressure, movement, water depth and interface requirements need separate technical review before the supply scope is confirmed.

H2S & Sour Service

Choke lines can carry fluids directly from the wellbore. Sour wells can therefore expose the hose and metallic end components to H2S, CO2, water and other corrosive constituents.

For an H2S Choke Hose or Sour Service Choke and Kill Hose, provide available H2S and CO2 information, operating pressure, temperature and well-fluid data.

If NACE MR0175 / ISO 15156 requirements apply to relevant metallic components, include them in the project specification.

Pressure rating alone does not confirm sour-service suitability.

Abrasive Mud Service

Weighted drilling mud can contain barite, drilled solids and other abrasive materials.

When severe abrasion applies, provide mud density, solids information, operating pressure and temperature so the hose bore and liner can be reviewed against actual service conditions.

Minimum Bend Radius, Overall Length & Hose Routing

Minimum Bend Radius defines how tightly the hose can bend within its qualified design.

A high-pressure Choke and Kill Hose contains substantial reinforcement, so it cannot bend like a small hydraulic hose.

Incorrect routing can create tight bends near the end fittings, excessive tension, twisting, unsupported weight or contact with surrounding steelwork. A hose can therefore have the correct pressure rating and bore yet still be unsuitable for the available installation space.

Overall length matters for the same reason. A hose that is too short can load the end terminations, while excessive length can create unwanted sag or an unsuitable bend.

Whenever an installation drawing is available, MBR, overall length, End A, End B, hose routing and expected equipment movement should be reviewed together.

End Connections & Equipment Interfaces

The end connections must match the actual BOP, drilling spool and manifold interfaces.

SGPE can review flange, hub and other approved project-specific high-pressure terminations.

Connection Data	Information Required
End A Size	Complete designation
End A Pressure	Pressure class
End A Type	Flange / hub / project type
End B Size	Complete designation
End B Pressure	Pressure class
End B Type	Flange / hub / project type
Sealing Interface	Groove / sealing information
Connected Equipment	BOP / drilling spool / choke manifold / kill manifold
Orientation	Where required
Drawing	Strongly recommended

End A and End B do not need to use the same connection.

For a BOP-to-Choke Manifold Hose, one termination must match the BOP or drilling spool outlet while the other matches the choke manifold interface.

For replacement work, clear photographs of both terminations help with preliminary identification. An original drawing or verified dimensional specification provides the strongest basis for final matching.

Replacement Choke and Kill Hose

Replacement is one of the most common high-intent API 16C procurement scenarios.

A drilling contractor may need a new hose after scheduled maintenance, failed inspection, external damage, BOP overhaul, manifold replacement, rig refurbishment or a change in the pressure-control system.

A correct Replacement API 16C Choke and Kill Hose must match more than pressure and bore.

Replacement Data	Why It Matters
Existing Nameplate	Identifies basic hose information
Original Datasheet	Confirms technical specification
Original Drawing	Confirms geometry
Working Pressure	Confirms pressure class
Hose I.D.	Confirms bore
FSL	Confirms project requirement
Overall Length	Maintains installation fit
End A	Matches BOP / drilling spool
End B	Matches manifold
Minimum Bend Radius	Confirms routing
Operating Temperature	Confirms service
Working Medium	Supports liner review
H2S / CO2	Supports sour-service review
External Armor	Confirms protection
Full Hose Photo	Shows complete assembly
End Photos	Supports connection identification
Installation Photos	Shows actual routing
Existing Part Number	Supports cross-reference

If the original documents are unavailable, technical review can begin with the nameplate, full hose photograph, both end connections and verified field dimensions.

This reduces the risk of receiving a Replacement BOP Choke Hose with the correct pressure rating but the wrong length, end termination or installation geometry.

Custom API 16C Flexible Lines

Not every BOP or manifold system uses a standard hose arrangement.

SGPE reviews custom requirements for special overall lengths, different End A and End B connections, project-specific BOP interfaces, external armor, H2S service or other non-standard operating conditions.

Custom configurations can cover 5K, 10K and 15K pressure classes, selected 20K projects and FSL 0–3.

This support is particularly useful for new BOP packages, rig upgrades, brownfield modifications and replacement projects where standard hose dimensions or end terminations do not match the existing equipment.

For buyers sourcing an API 16C Choke and Kill Hose Supplier in China, SGPE can review both the flexible line and the connected well control interfaces before preparing the technical proposal.

Inspection, Testing & Documentation

Oilfield operators, drilling contractors and EPC companies often require a defined quality and documentation package with the hose.

Depending on the purchase order and project specification, SGPE can coordinate the approved datasheet and drawing, dimensional inspection, end-connection verification, pressure testing and test records. The agreed documentation package can also include a Certificate of Conformity, applicable material documents, customer or third-party inspection records, ITP witness points and final MDR documentation.

For EPC and operator-controlled projects, provide the ITP, MDR and other documentation requirements during the RFQ stage whenever possible. Defining the inspection and documentation scope before production helps avoid late changes after the assembly has already been completed.

Support for EPC, Drilling Contractors & Oilfield MRO

EPC Projects

EPC contractors often provide a structured technical package containing the datasheet, FSL, connection drawings, BOP and manifold interfaces, ITP and MDR requirements.

Reviewing these documents together is particularly useful when different vendors supply the BOP, drilling spool and manifold.

Drilling Contractors

A drilling contractor may have only the BOP drawing, manifold drawing, working pressure, hose I.D., required length and field layout.

These references can be used to identify missing parameters and build a clearer hose specification before quotation.

Oilfield MRO & Replacement

MRO buyers sometimes begin with only an existing hose, nameplate, part number, field photographs and several measured dimensions.

This information can provide a practical starting point for BOP overhaul, rig refurbishment, brownfield modification, obsolete hose replacement and scheduled well control maintenance.

Related BOP & Well Control Equipment from SGPE

An API 16C Flexible Choke and Kill Line forms one part of the complete pressure-control system.

SGPE also supports related well control equipment, allowing several pressure and connection interfaces to be reviewed through one supplier.

Related Equipment	Relationship to Choke / Kill Hose
API 16A Ram BOP	Choke / kill system interface
API 16A Annular BOP	BOP stack component
API 16A Drilling Spool	Choke and kill outlet connection
API 16C Choke Manifold	Choke-line destination
Kill Manifold	Kill-line pressure circuit
Drilling Choke	Well pressure regulation
API 6A Gate Valve	High-pressure isolation
API 6A Flanges	Pressure connection
Adapter Spools	Interface transition
Double Studded Adapters	Pressure crossover connection
BOP Control System	Well control package
API 7K Rotary Hose	Drilling mud circulation
API 7K Vibrator Hose	Mud pump discharge

For new well control packages, coordinated sourcing can simplify pressure-class matching, connection review and project documentation.

For MRO projects, buyers can purchase only the required replacement hose while retaining the existing BOP and manifold equipment.

Why Choose SGPE for API 16C Hose Requirements?

SGPE focuses on petroleum drilling, wellhead and well control equipment, so hose selection does not stop at the working-pressure number.

When project information is available, the Flexible Choke and Kill Line can be reviewed together with the BOP, drilling spool, choke manifold and kill manifold interfaces. This system-level approach helps reduce connection, routing and dimensional errors before production.

SGPE supports common 5K, 10K and 15K Choke and Kill Hose requirements together with selected 20K projects. Project review can also cover FSL 0–3, H2S service, offshore installations, abrasive drilling fluids, custom overall lengths and different End A / End B configurations.

Replacement projects often begin with incomplete engineering information. Existing nameplates, drawings, photographs and verified dimensions can provide a practical basis for technical review.

For EPC and operator-controlled projects, SGPE can coordinate project-specific datasheets, drawings, inspection requirements, third-party inspection and final documentation according to the agreed supply scope.

Because SGPE also supports BOPs, drilling spools, choke manifolds, kill manifolds, API 6A valves, flanges, adapters and BOP control equipment, buyers can review several well control interfaces through one supplier.

API 16C Hose Price, Quote & Lead Time

The final API 16C Choke and Kill Hose price depends on the actual configuration rather than working pressure alone.

A standard 3″ 10K Choke Hose differs significantly from a 15K FSL 3 Choke and Kill Hose requiring H2S service, custom end connections, external armor and third-party inspection.

Procurement Factor	Effect on Quote / Delivery
Working Pressure	Changes hose construction
Hose I.D.	Changes material and assembly size
Overall Length	Changes material requirement
FSL	Changes technical and qualification scope
End A / End B	Changes termination configuration
Operating Temperature	Changes hose requirement
Working Medium	Affects liner selection
H2S / Sour Service	Adds service requirements
External Armor	Adds protection scope
Fire Requirement	Changes project scope
Offshore / Subsea Service	Adds engineering review
Replacement Matching	Adds interface verification
Third-Party Inspection	Adds inspection coordination
MDR / Documentation	Adds documentation scope
Quantity	Affects production planning
Technical Approval	Affects production release and lead time

For an accurate API 16C Hose quote and lead time, provide the actual technical specification rather than requesting only a generic 10K or 15K hose price.

Once the configuration is confirmed, SGPE can prepare the corresponding API 16C Hose datasheet, technical proposal, commercial quotation and delivery information.

RFQ Data Sheet

RFQ Parameter	Information to Provide
Service	Choke Line / Kill Line
Quantity	Required assemblies
Rig Type	Land / offshore / project-specific
Working Pressure	5K / 10K / 15K / selected 20K
Hose I.D.	Required bore
FSL	FSL 0 / 1 / 2 / 3
Operating Temperature	Minimum / maximum
Overall Length	Required length
End A	Complete designation
End B	Complete designation
Connection Drawing	Preferred
Minimum Bend Radius	If defined
Working Medium	Mud / kill fluid / wellbore fluid
Mud Density / Solids	If relevant
H2S / CO2	Available service data
Sour-Service Requirement	If applicable
Fire Protection	If required
External Armor	If required
Inspection / TPI	Required scope
ITP / MDR	If applicable
Existing Datasheet / Drawing	Replacement project
Nameplate	Clear photograph
Hose / End Photos	Replacement project
Installation Photos	Existing routing
Existing Part Number	If available
Required Delivery	Project schedule
Destination	Country / project location

If complete technical information is unavailable, start with the nameplate, one full hose photograph and clear photographs of both end connections.

SGPE can use these references to identify the remaining technical questions before preparing a quotation.

Frequently Asked Questions About API 16C Choke and Kill Hose

1. What is an API 16C Choke and Kill Hose?

An API 16C Choke and Kill Hose is a flexible high-pressure line used in BOP and well control systems to connect equipment such as the BOP stack, drilling spool, choke manifold and kill manifold.

A choke hose normally carries wellbore fluid from the BOP or drilling spool toward the choke manifold, while a kill hose provides a high-pressure path for pumping kill fluid toward the well.

Depending on its installation position, the same product may also be described as an API 16C Flexible Choke and Kill Line, BOP Choke Hose, BOP Kill Hose, Choke Manifold Hose, Drilling Spool Choke Hose or Well Control Hose. These flexible lines are commonly used on land rigs, offshore platforms and other high-pressure drilling installations where rigid piping cannot easily accommodate movement or equipment alignment.

2. What is the difference between a Choke Hose and a Kill Hose?

A Choke Hose and a Kill Hose form part of the same well control system, but they perform different functions.

The choke hose normally routes wellbore fluid from the BOP stack or drilling spool to the choke manifold, where the flow and backpressure can be controlled. The kill hose works in the opposite direction within the pressure-control circuit and carries weighted drilling mud or another specified kill fluid toward the BOP and well.

Although both products can use similar high-pressure flexible construction, their connected equipment and flow functions differ. When requesting a BOP Choke Hose, BOP Kill Hose or Flexible Choke and Kill Line, the RFQ should clearly identify the required service, working pressure, FSL, hose I.D., overall length and end connections.

3. What working pressures are available for API 16C Choke and Kill Hoses?

Common project requirements include 5,000 PSI, 10,000 PSI and 15,000 PSI Choke and Kill Hoses, together with selected 20,000 PSI Flexible Choke and Kill Line configurations.

Typical inquiries can include a 2 Inch 10K Choke Hose, 3 Inch 10000 PSI Choke Hose, 2 Inch 15K Kill Hose or 15K FSL 3 Choke and Kill Hose for BOP, drilling spool and manifold applications.

Working pressure alone, however, does not define the correct assembly. The hose must also match the required bore, FSL, operating temperature, minimum bend radius, overall length and connection interfaces. High-pressure BOP systems therefore require the hose specification to be reviewed together with the connected well control equipment.

4. What API 16C Choke and Kill Hose sizes are commonly available?

Common API 16C Choke and Kill Hose I.D. sizes include 2″, 2-1/2″, 3″, 3-1/2″ and 4″, depending on the pressure class, FSL and qualified hose design.

For example, a land-rig choke line may use a 3″ bore where the BOP and choke manifold system requires that flow area, while a different high-pressure or offshore installation may require another bore and connection arrangement.

Not every hose I.D. is available in every pressure and FSL combination. The final size should therefore be selected according to the BOP outlet, drilling spool, choke or kill manifold design, required flow capacity, installation space and hose routing rather than by nominal bore alone.

5. What do FSL 0, FSL 1, FSL 2 and FSL 3 mean for API 16C hoses?

FSL stands for Flexible Specification Level and forms part of the project specification for an API 16C Flexible Choke and Kill Line.

A project can specify FSL 0, FSL 1, FSL 2 or FSL 3 according to the requirements defined by the operator, drilling contractor or EPC company. The correct level should follow the actual purchase specification rather than an assumption that the highest number is automatically suitable for every installation.

For an FSL 3 Choke and Kill Hose, the FSL requirement should be identified during the RFQ stage so the pressure class, hose design, inspection scope and required documentation can be reviewed together. This is particularly important for high-pressure well control packages and operator-controlled drilling projects.

6. Can SGPE supply API 16C hoses for H2S and sour-service applications?

SGPE can review H2S Choke Hose and Sour Service Choke and Kill Hose requirements for wells where the hose and metallic end components may be exposed to H2S, CO2 and other corrosive constituents.

For sour-service applications, buyers should provide the available H2S and CO2 information together with the working pressure, operating temperature and working-fluid data. These conditions can affect the selection of the hose construction and relevant metallic components.

If NACE MR0175 / ISO 15156 requirements apply to the metallic components within the project scope, they should be identified in the technical specification. A 10K or 15K pressure rating by itself does not confirm that a hose is suitable for sour service.

7. Can SGPE provide custom lengths and different End A / End B connections?

Yes. SGPE supports custom API 16C Choke and Kill Hose requirements for new BOP packages, rig upgrades, EPC projects, brownfield modifications and replacement work.

The overall hose length can be reviewed against the actual installation route, minimum bend radius and expected equipment movement. End A and End B can also use different approved configurations when the BOP or drilling spool connection does not match the choke or kill manifold interface.

For a new installation, providing the BOP and manifold drawings or a general equipment layout helps define the correct assembly. For a replacement hose, the existing dimensions, end-connection details and installation photographs provide a useful basis for interface matching.

8. What end connections can an API 16C Choke and Kill Hose use?

The end connections depend on the actual interfaces of the BOP, drilling spool, choke manifold and kill manifold.

API 16C hose assemblies can use applicable flange, hub or other approved project-specific high-pressure terminations. End A and End B do not necessarily need to be identical. For a BOP-to-Choke Manifold Hose, for example, one end must match the BOP or drilling spool outlet while the other must match the choke manifold connection.

To avoid interface errors, the RFQ should include the complete connection size, pressure class, connection type and sealing information for both ends. Connection drawings are especially useful for replacement, rig refurbishment and well control system upgrade projects.

9. Why is Minimum Bend Radius important when selecting an API 16C hose?

Minimum Bend Radius, or MBR, defines the minimum radius within which the hose can be routed according to its qualified design.

An API 16C Choke and Kill Hose contains substantial high-pressure reinforcement and cannot be bent like a small hydraulic hose. Routing the hose too tightly can create unwanted mechanical loading near the body of the hose or the end terminations.

The hose may therefore have the correct pressure rating and I.D. but still be unsuitable for the available installation space. For land rigs, offshore installations and BOP-to-manifold connections, the MBR, overall length, hose routing, support arrangement and End A / End B positions should be reviewed together before the final assembly is confirmed.

10. Can SGPE supply a Replacement API 16C Choke and Kill Hose?

Yes. SGPE supports Replacement API 16C Choke and Kill Hose, Replacement BOP Choke Hose and Replacement Kill Hose requirements for scheduled maintenance, failed inspections, BOP overhauls, rig refurbishment and manifold upgrades.

A correct replacement must match more than working pressure and hose bore. The overall length, FSL, end connections, minimum bend radius, operating temperature, service medium and existing installation geometry can all affect interchangeability.

If the original datasheet or drawing is available, it provides the best reference. When original documentation is missing, SGPE can begin the technical review using the existing hose nameplate, full hose photograph, clear photographs of both ends and verified field dimensions before identifying any remaining information required for quotation.

11. What inspection, testing and documentation can be supplied with an API 16C hose?

The inspection and documentation package depends on the purchase order, operator specification and project quality requirements.

According to the agreed supply scope, an API 16C Choke and Kill Hose project can include an approved datasheet and drawing, dimensional and end-connection inspection, pressure-test records, Certificate of Conformity, applicable material documentation and relevant quality records.

EPC contractors and operator-controlled projects may also require an ITP, third-party inspection, witness points or MDR documentation. These requirements should be defined during the RFQ or technical clarification stage whenever possible so the inspection and documentation scope can be incorporated before production rather than added after the hose assembly has been completed.

12. How can I get an API 16C Choke and Kill Hose price, quotation and lead time?

To obtain an accurate API 16C Choke and Kill Hose price and quotation, provide the working pressure, hose I.D., FSL, overall length, End A, End B, operating temperature, working medium, H2S requirement, quantity and required delivery schedule.

For a replacement hose, it is also helpful to provide the existing nameplate, datasheet or drawing, overall dimensions and clear photographs of the hose and both end connections.

The final price and lead time can vary between a standard 3″ 10K Choke Hose and a 15K FSL 3 Sour Service Choke and Kill Hose requiring custom ends, external armor or third-party inspection. After reviewing the specification and connected BOP, drilling spool or manifold interfaces, SGPE can confirm the suitable configuration and provide the corresponding technical proposal, commercial quotation and delivery information.

Request an API 16C Choke and Kill Hose Quote from SGPE

Looking for an API 16C Choke and Kill Hose Supplier for a new BOP package, drilling project, choke manifold system or replacement requirement?

SGPE supports 5K, 10K and 15K API 16C Flexible Choke and Kill Lines, selected 20K projects, FSL 0–3, H2S / sour-service requirements, custom lengths, custom end connections, offshore applications and project-specific protection options.

For a new project, send the working pressure, hose I.D., FSL, overall length, End A / End B, operating temperature and working medium.

For a replacement requirement, provide the existing nameplate, datasheet or drawing, dimensions and clear photographs.

SGPE will review the hose specification together with the BOP, drilling spool, choke manifold and kill manifold interfaces, confirm the suitable configuration, and provide the corresponding technical proposal and commercial quotation.