Description

API 6A Wellhead Tee Manufacturer for 2K-15K Christmas Trees, Production and Injection Wells

SGPE manufactures and supplies API 6A Wellhead Tees for surface wellheads and Christmas Trees used in oil production, natural gas production, water and gas injection, well testing, flowback, workover and brownfield replacement.

Our manufacturing range includes API 6A Studded Tees, Flanged Tees, Christmas Tree Tees, Production Tree Tees, Forged Wellhead Tee Blocks, Equal Bore Tees, Reduced Outlet Tees, High Pressure Wellhead Tees, Sour Service Tees, CRA-Protected Tees and custom replacement Tree Tees.

An API 6A Wellhead Tee, also called a Tree Tee, Christmas Tree Tee, Wellhead Tee Block or API 6A Tee Fitting, has three pressure-containing connections. Two opposite connections form the main run, while the third creates a 90-degree side branch.

In a production Christmas Tree, the branch normally connects with a wing valve, choke valve, production flowline or another pressure-control component. Injection wellheads use a similar arrangement for water or gas injection. Well testing and workover systems can also use a Tee when the surface layout requires one side outlet instead of the two opposing branches of a Wellhead Cross.

SGPE supports 2,000 psi, 3,000 psi, 5,000 psi, 10,000 psi and 15,000 psi Wellhead Tee requirements. Depending on the project, configurations can use API 6B or API 6BX connections where applicable, RTJ sealing interfaces, equal or reduced outlets, forged alloy-steel bodies, sour-service materials and CRA-protected wetted surfaces.

For brownfield and legacy equipment, SGPE can manufacture a Replacement API 6A Wellhead Tee from an approved drawing or verified field dimensions. The engineering review checks the main bore, branch bore, flange or studded connections, RTJ grooves, outlet orientation and center-to-face dimensions before production.

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API 6A Wellhead Tee Manufacturer and Supplier

As an API 6A Wellhead Tee manufacturer, SGPE supports new Christmas Tree packages, high-pressure wellhead projects and replacement requirements for operators, EPC contractors, drilling contractors, wellhead service companies and oilfield equipment distributors.

Purchasers use several names for the same general product. Common descriptions include API 6A Tree Tee, Studded Tree Tee, Flanged Tree Tee, Christmas Tree Tee, Production Tree Tee, Forged Tree Tee, High Pressure Tree Tee and Wellhead Tee Block.

The name alone does not define the correct configuration.

Working pressure, main bore, branch bore, connection type, RTJ groove, material class, PSL, temperature class and mating equipment all need to match the wellhead system.

This becomes particularly important when sourcing 10K or 15K Wellhead Tees, API 6BX Studded Tees, H2S-service Tree Tees, CRA-protected equipment or replacement Christmas Tree components.

For custom and replacement projects, SGPE reviews the actual connection schedule and service conditions before confirming the manufacturing configuration.

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API 6A Wellhead Tee Product Range

For a standard project, buyers can provide a data sheet and connection schedule. For a replacement or custom Tee, existing drawings, photographs, nameplate information and verified dimensions can help define the interfaces.

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API 6A Studded Tee and Flanged Tee

API 6A Studded Tee

An API 6A Studded Tee uses studded end connections to create a compact pressure-containing interface.

This design reduces the external connection envelope and works well where Christmas Tree height, valve spacing or nearby structures restrict installation space.

Typical applications include production trees, high-pressure gas wellheads, water and gas injection systems, offshore surface wellheads and brownfield replacement.

SGPE machines the stud pattern, main bore, branch bore, RTJ groove, sealing face and outlet centerline to the approved dimensions.

For replacement equipment, the review also checks the mating valve, existing stud arrangement, ring groove and center-to-face dimensions.

API 6A Flanged Tee

An API 6A Flanged Tee uses integral flange connections for direct assembly with compatible gate valves, wing valves, adapters and other Christmas Tree components.

Depending on bore size and working pressure, the project can use API 6B or API 6BX connections where applicable.

A flange designation alone is not enough to manufacture a replacement or project-specific component. Bore size, RTJ groove, bolting arrangement and mating equipment must also match.

Flanged Tree Tees suit oil and gas production wells, injection wellheads, well testing systems, workover operations and Christmas Tree replacement projects.

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API 6A Wellhead Tee Technical Specifications

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API 6A Wellhead Tee Pressure Ratings

SGPE’s project range covers 2K, 3K, 5K, 10K and 15K Wellhead Tee requirements.

Pressure class is only the starting point. Bore arrangement, connection family, material requirements and actual service conditions must also match.

2K and 3K API 6A Wellhead Tee

A 2K or 3K Wellhead Tee can suit conventional oil and gas production, water injection and lower-pressure surface wellheads.

Larger bore arrangements are common in some lower-pressure systems, so connection geometry and bore size remain important selection factors.

5K API 6A Wellhead Tee

A 5K API 6A Wellhead Tee serves production Christmas Trees, injection wellheads, well testing equipment and workover applications.

Purchasing descriptions often include 5K Studded Tee, 5000 psi Tree Tee, 5K Flanged Tee and API 6A 5K Wellhead Tee.

The quotation should still define the main bore, side outlet, RTJ interface and mating equipment.

10K API 6A Tree Tee

A 10K API 6A Tree Tee suits high-pressure oil and natural gas production, injection systems and surface well testing equipment.

Typical RFQ descriptions include 10K Studded Tee, 10000 psi Wellhead Tee, 10K 6BX Tree Tee and 10K Christmas Tree Tee.

At this pressure level, forging integrity, bore geometry, RTJ grooves, material properties and connection dimensions require careful control.

15K API 6A Wellhead Tee

A 15K API 6A Wellhead Tee serves severe high-pressure production and injection systems.

High-pressure natural gas, H2S, CO2, produced water or chloride exposure can place additional demands on material class, hardness, temperature capability and corrosion protection.

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API 6A Bore, Outlet and RTJ Connection Options

Tree Tees can use equal or reduced bore arrangements.

An Equal Bore Wellhead Tee uses similar main and branch flow areas. It suits systems where the side branch requires substantial flow capacity.

A Reduced Outlet Tree Tee uses a smaller side connection. This arrangement often connects a larger production bore with a smaller wing valve, choke valve or auxiliary outlet.

Typical project bores include 1-13/16″, 2-1/16″, 2-9/16″, 3-1/16″, 3-1/8″, 4-1/16″ and 5-1/8″, depending on the selected pressure and connection configuration.

For an accurate quotation, both the main bore and branch bore should be identified.

API 6B and API 6BX Wellhead Tee Connections

An API 6B Wellhead Tee uses an applicable Type 6B interface. Applicable 6B arrangements can use R or RX ring-joint sealing.

An API 6BX Wellhead Tee uses an applicable 6BX interface with a BX ring-joint seal.

For replacement equipment, the existing connection should be verified directly rather than inferred from nominal pressure alone.

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Common API 6A Wellhead Tee RFQ Configurations

Industrial RFQs often identify a Tree Tee by bore, working pressure and branch size. The following descriptions reflect common purchasing formats, while final dimensions still require technical confirmation.

Before issuing the final quotation, SGPE reviews the bore combination, RTJ grooves, mating valves and service conditions.

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API 6A Material Class, PSL and Temperature Requirements

Pressure rating does not determine the full material and quality specification. Material class, Product Specification Level and temperature class need to reflect the actual well environment.

API 6A Material Class

General-service projects can use AA, BB or CC material classes, while sour-service requirements can involve DD, EE, FF or HH, where applicable.

The correct material class depends on the requirements for the pressure-containing and retained fluid-wetted components.

For sour or corrosive wells, the engineering review should consider H2S, CO2, operating temperature, chlorides, produced water and the specified corrosion-control strategy.

Product Specification Level

Where applicable, API 6A Tees can use PSL 1, PSL 2, PSL 3 or PSL 4 according to product, pressure, material and project requirements.

The selected PSL influences material verification, traceability, inspection, NDE and testing.

For eligible equipment, a qualifying PSL 3 product can use the supplemental 3G designation after meeting the applicable additional gas-testing requirements.

API 6A Temperature Class

Cold-climate surface wellheads, offshore installations and higher-temperature production or injection projects can require different material and impact-property controls.

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Sour Service API 6A Wellhead Tee

A Sour Service API 6A Wellhead Tee operates in wells where H2S creates additional cracking and corrosion risks.

Sour-service suitability involves more than an external coating. Pressure-containing materials, heat treatment, hardness and retained fluid-wetted surfaces must suit the specified environment.

Where required by the project specification, material selection can also address NACE MR0175 / ISO 15156 requirements.

Typical applications include sour oil production, sour gas wells, high-pressure gas systems and injection projects handling H2S-containing fluids.

For technical review, buyers should provide available H2S concentration or partial pressure, operating temperature, CO2 content, chloride level and other relevant fluid information.

CRA and Alloy 625 / Inconel 625 Overlay

H2S, CO2, chlorides and produced water can create aggressive corrosion conditions on internal bores and sealing surfaces.

For these environments, SGPE can evaluate a CRA-Protected API 6A Tree Tee.

Depending on the approved specification, corrosion-resistant material can protect selected RTJ grooves, sealing surfaces, internal bores or other retained fluid-wetted areas.

Where a nickel-alloy system is required, Alloy 625 or Inconel 625-type weld overlay can form part of the corrosion-control strategy.

The final alloy, overlay area and inspection requirements depend on the approved project specification and actual service conditions.

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API 6A Wellhead Tee Applications

Oil and Natural Gas Production

An Oil Well Tree Tee can form part of the vertical production flow path while its branch connects with a wing valve, choke valve or production line.

Natural gas wells use the same general arrangement. High-pressure gas, wet gas, H2S, CO2 and produced water can increase material and corrosion-control requirements.

For deeper or high-pressure gas wells, a 10K or 15K High Pressure Wellhead Tee can provide the required branch while matching the surrounding Christmas Tree equipment.

Water Injection, Gas Injection and EOR

An API 6A Injection Wellhead Tee can form part of a high-pressure water or gas injection tree.

Water injection can introduce chlorides, dissolved oxygen and treatment chemicals. Gas injection can expose equipment to higher pressure, CO2 or H2S.

Material selection should therefore reflect the actual injection environment.

Tree Tees can also serve gas reinjection, reservoir pressure maintenance, waterflood and other enhanced oil recovery applications.

Well Testing and Flowback

During well testing, a Tree Tee can connect the wellhead with temporary high-pressure surface equipment.

Flowback can expose the component to changing pressure, high gas rates, produced liquids, sand and other solids. Bore size, flow velocity and erosion conditions can therefore influence equipment selection.

Workover and Well Intervention

Workover projects often replace or reconfigure only part of an existing Christmas Tree.

A custom or replacement Tee can restore the required branch while allowing compatible gate valves, adapters and other serviceable equipment to remain in use.

Offshore and Brownfield Wellheads

Offshore surface wellheads often combine limited installation space with strict inspection and documentation requirements.

A compact Studded Tree Tee can reduce the connection envelope while supporting project-specific traceability, NDE, pressure testing and TPI requirements.

Brownfield and mature oilfields present a different challenge. Existing trees can contain obsolete components, legacy flange interfaces or project-specific center-to-face dimensions.

For these projects, SGPE can manufacture a Replacement Christmas Tree Tee from approved drawings or verified field measurements so the new component matches the retained equipment.

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API 6A Wellhead Tee Application and Selection Matrix

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Forged Wellhead Tee Manufacturing and Quality Control

The Tee body carries well pressure through intersecting flow passages. The integrity of the pressure-containing forging and machined connections is therefore critical.

SGPE manufactures project-specific Wellhead Tees using qualified materials and controlled machining processes according to the approved manufacturing requirements.

The manufacturing route can include forging, heat treatment, rough machining, precision CNC machining, dimensional inspection, NDE and pressure testing.

Critical dimensions include the main bore, branch bore, connection faces, RTJ grooves, stud patterns, outlet position and center-to-face dimensions.

When required by the purchase order, SGPE can coordinate third-party inspection according to an approved ITP.

The final manufacturing record package can include MTR/MTC documents, NDE reports, dimensional inspection records, pressure-test reports and other agreed quality documents.

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API 6A Wellhead Tee vs API 6A Wellhead Cross

A Wellhead Tee and Wellhead Cross both provide pressure-containing branches, but they serve different Christmas Tree layouts.

A Tree Tee suits a Christmas Tree that requires one production wing or auxiliary branch.

A Wellhead Cross suits a tree that requires two opposing side connections.

The approved wellhead schematic, mating valves and required flow paths should determine the final choice.

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Replacement API 6A Wellhead Tee

A Replacement API 6A Wellhead Tee usually requires more dimensional review than a Tee for a new Christmas Tree.

Older wellheads can use legacy connections, obsolete components or project-specific center-to-face dimensions. In some cases, the original manufacturer no longer supports the installed equipment.

The replacement review should cover the main bore, branch bore, working pressure, Studded or Flanged connection, RTJ groove, stud pattern, outlet orientation and center-to-face dimensions.

If the original drawing is available, SGPE can review it together with mating valve information.

If no drawing exists, clear photographs, nameplate data and verified field measurements can help define the required interfaces.

Typical requirements include Replacement API 6A Wellhead Tees, Replacement Christmas Tree Tees, Legacy Tree Tees, Obsolete Wellhead Tees, Custom Replacement Tree Tees and brownfield wellhead replacement equipment.

A correctly matched replacement can allow the operator to retain compatible gate valves, wing valves, adapters and other serviceable Christmas Tree components.

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Custom API 6A Wellhead Tee

Not every wellhead follows a standard overall arrangement.

SGPE can manufacture a Custom API 6A Wellhead Tee around project-specific bores, branch sizes, connection combinations, outlet orientation and installation dimensions.

Custom requirements can arise in new Christmas Tree packages, offshore replacement, workover modifications and legacy equipment retrofit.

Before production, the engineering review should confirm the actual mating equipment, especially when the Tee combines different nominal sizes or connects with retained equipment.

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API 6A Wellhead Tee Selection and RFQ Guide

A complete RFQ reduces clarification time and allows the technical team to review the full interface before issuing a quotation.

For replacement equipment, photographs, nameplate information and verified field dimensions are especially useful when the original drawing is unavailable.

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What Affects API 6A Wellhead Tee Price and Lead Time?

The API 6A Wellhead Tee price depends on more than nominal bore and working pressure.

A conventional 5K Flanged Tee follows a different manufacturing route from a 15K Sour Service Studded Tee with CRA overlay.

Cost and lead time depend on main and branch sizes, pressure class, connection type, body material, material class, PSL, temperature requirement, NDE scope and corrosion-protection system.

Custom replacement projects can also require drawing review, dimensional verification and additional engineering.

Order quantity, Alloy 625 or other CRA requirements, third-party inspection and final documentation can further affect the commercial quotation and production schedule.

For an accurate API 6A Wellhead Tee price and quotation, buyers should provide the complete specification, quantity and available drawings.

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Why Choose SGPE for API 6A Wellhead Tee Projects?

SGPE focuses on upstream wellhead, pressure-control and oilfield equipment.

We review a Wellhead Tee as part of the complete Christmas Tree rather than treating it as an isolated industrial fitting.

Our project scope covers 2K, 3K, 5K, 10K and 15K Tree Tees in Studded, Flanged, Equal Bore, Reduced Outlet, Sour Service, CRA-Protected and replacement configurations.

For new equipment, the technical review focuses on bore sizes, working pressure, connection type, materials and actual service conditions.

For brownfield projects, existing drawings, mating valves, photographs and verified dimensions can be reviewed before the replacement configuration is finalized.

SGPE can also support project-specific ITP requirements, third-party inspection, NDE, pressure testing and manufacturing documentation according to the approved purchase order.

This project-based approach supports both single replacement orders and multi-item wellhead equipment packages.

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Related API 6A Wellhead and Christmas Tree Equipment

An API 6A Wellhead Tee normally works with other pressure-containing equipment in the wellhead and Christmas Tree assembly.

Related products include API 6A Wellhead Crosses, Gate Valves, Choke Valves, Casing Heads, Casing Spools, Tubing Heads, Tubing Head Adapters, Adapter Spools, Spacer Spools, Valve Removal Plugs and Back Pressure Valves.

Matching pressure rating, bore size, connection type, RTJ groove, material class and temperature requirements across these components helps maintain compatibility throughout the complete system.

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Frequently Asked Questions About API 6A Wellhead Tee

1. What is an API 6A Wellhead Tee?

An API 6A Wellhead Tee, also known as a Tree Tee, Christmas Tree Tee, Production Tree Tee or Wellhead Tee Block, is a three-way pressure-containing component used in surface wellhead and Christmas Tree systems. Two opposite connections form the main flow path, while the third connection creates a 90-degree side branch.

The branch commonly connects with a wing valve, choke valve, production flowline or another pressure-control component. API 6A Wellhead Tees are used in oil and natural gas production, water and gas injection, well testing, flowback, workover and other upstream applications where the Christmas Tree requires one side outlet.

2. What is the difference between an API 6A Wellhead Tee and a Wellhead Cross?

An API 6A Wellhead Tee has three pressure-containing connections, while an API 6A Wellhead Cross has four. Both designs normally have two opposite connections in the main run, but the Tee provides one side branch and the Cross provides two opposing side outlets.

A Tree Tee is generally selected when the Christmas Tree requires one production wing, injection branch or auxiliary outlet. A Wellhead Cross is more suitable when valves or flow paths are required on both sides of the vertical bore. The final choice should follow the approved Christmas Tree schematic, mating valves, bore arrangement and required flow direction.

3. What pressure ratings are available for API 6A Wellhead Tees?

SGPE supports 2K, 3K, 5K, 10K and 15K API 6A Wellhead Tee requirements, corresponding to 2,000, 3,000, 5,000, 10,000 and 15,000 psi working pressure.

A 5K Tree Tee is commonly used in production, injection and well testing systems, while 10K and 15K High Pressure Wellhead Tees suit more demanding oil and natural gas wells. Pressure rating alone does not determine the final product. Bore size, connection type, material class, PSL, temperature class, RTJ interface and actual well conditions must also match the surrounding equipment.

4. What bore sizes are available for API 6A Tree Tees?

Typical project bore sizes include 1-13/16″, 2-1/16″, 2-9/16″, 3-1/16″, 3-1/8″, 4-1/16″ and 5-1/8″, subject to the selected pressure rating and connection configuration.

An Equal Bore Tree Tee uses similar main and branch bore sizes, while a Reduced Outlet Tree Tee uses a smaller side branch, often for connection to a wing valve, choke or auxiliary outlet. Because not every bore and pressure combination is applicable, buyers should provide both the main bore and branch bore together with the required pressure class when requesting a quotation.

5. What is the difference between an API 6A Studded Tee and a Flanged Tee?

An API 6A Studded Tee uses studded end connections that help create a compact Christmas Tree arrangement. This design is useful where valve spacing, tree height or surrounding structures limit installation space, including high-pressure gas wells, offshore surface wellheads and brownfield replacement projects.

An API 6A Flanged Tee uses integral flange connections for conventional bolted assembly with gate valves, wing valves, adapters and other wellhead equipment. The correct choice depends on the mating equipment, available installation space, RTJ groove, bore size, pressure rating and connection schedule rather than personal preference alone.

6. Can an API 6A Wellhead Tee use API 6B or API 6BX connections?

Yes. Depending on the applicable bore, pressure rating and project configuration, an API 6A Wellhead Tee can use API 6B or API 6BX connections.

Applicable API 6B connections can use R or RX ring-joint sealing arrangements, while API 6BX connections use BX ring gaskets. High-pressure projects are often described in RFQs as 10K 6BX Tree Tee, 15K Wellhead Tee or API 6BX Studded Tee.

For accurate manufacturing and replacement work, the complete connection designation, RTJ groove, ring number, stud or bolt pattern and mating equipment should be confirmed rather than relying on nominal pressure alone.

7. What material classes, PSL and temperature classes can apply to an API 6A Wellhead Tee?

API 6A Wellhead Tee material requirements depend on the pressure rating, service environment and applicable project specification. General-service applications can use AA, BB or CC material classes, while sour-service projects can involve DD, EE, FF or HH, where applicable.

API 6A Tees can use PSL 1, PSL 2, PSL 3 or PSL 4 according to the applicable product and service requirements. Eligible PSL 3 equipment can use the supplemental 3G designation after meeting the applicable additional gas-testing requirements. Temperature classes such as K, L, N, P, S, T, U and V are selected according to actual operating conditions, including cold-climate, offshore and higher-temperature production or injection service.

8. Can SGPE supply an API 6A Wellhead Tee for H2S sour service?

Yes. SGPE can support Sour Service API 6A Wellhead Tee and H2S Tree Tee requirements when the purchaser provides the required service conditions and material specifications.

Sour-service suitability involves more than external coating. The pressure-containing material, heat treatment, hardness and retained fluid-wetted surfaces must suit the specified H2S environment. Where required by the project, material selection can also address NACE MR0175 / ISO 15156 requirements. Sour oil wells, sour natural gas wells, high-pressure gas production and certain injection applications are typical projects where this type of material review becomes particularly important.

9. Can an API 6A Wellhead Tee use CRA or Inconel 625 overlay?

Yes. For corrosive service, SGPE can evaluate a CRA-Protected API 6A Wellhead Tee with corrosion-resistant material on selected retained fluid-wetted areas.

Depending on the approved specification, Alloy 625 or Inconel 625-type weld overlay can protect RTJ grooves, sealing surfaces, internal bores or other selected areas exposed to aggressive fluids. This option can be useful in wells containing H2S, CO2, chlorides or corrosive produced water. The final CRA material, overlay area and inspection requirements should reflect the base material, operating temperature, fluid composition and approved corrosion-control strategy.

10. What inspection and testing can SGPE support for API 6A Wellhead Tees?

SGPE can support inspection and testing according to the approved API 6A Wellhead Tee specification and project quality requirements. Typical controls can include material traceability, dimensional inspection, hardness testing, UT, MT, PT and hydrostatic pressure testing where applicable.

Qualifying projects can also require additional gas testing, CRA overlay inspection or third-party inspection under an approved ITP. This level of quality control is especially important for 10K and 15K Tree Tees, high-pressure gas wells, sour-service equipment, offshore surface wellheads and critical replacement projects. Final documentation can include agreed material, NDE, dimensional and pressure-test records.

11. Can SGPE manufacture a replacement API 6A Tree Tee for obsolete or legacy equipment?

Yes. SGPE supports Replacement API 6A Wellhead Tee, Replacement Christmas Tree Tee, Legacy Tree Tee and brownfield wellhead replacement projects.

Older Christmas Trees can use discontinued components, legacy connections or project-specific center-to-face dimensions. When the original drawing is available, SGPE can review it together with the mating valve information.

If the drawing is unavailable, clear equipment photographs, nameplate data and verified field measurements can help define the main bore, branch bore, RTJ groove, stud pattern, outlet orientation and other critical interfaces. A correctly matched replacement can allow operators to retain compatible valves, adapters and other serviceable wellhead equipment.

12. What information should I provide for an API 6A Wellhead Tee quotation?

For an accurate API 6A Wellhead Tee quotation, buyers should provide the working pressure, main bore, branch bore, Studded or Flanged configuration, API 6B or 6BX connection where applicable, RTJ groove, material requirements, PSL, temperature class, quantity and service conditions.

For sour-service applications, available H2S, CO2, chloride and fluid information can help define the material and CRA requirements. For a custom or replacement Tree Tee, existing drawings, photographs, nameplate information, mating valve details and critical interface dimensions are particularly useful. SGPE can review the submitted specification or RFQ and provide the corresponding technical proposal and commercial quotation.

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Request an API 6A Wellhead Tee Quote from SGPE

Our products support oil and gas production, water and gas injection, high-pressure and sour wells, EOR, well testing, flowback, workover, offshore surface wellheads and brownfield replacement. SGPE can also support custom configurations, replacement engineering, ITP/TPI requirements, inspection and project documentation.

For new projects, send the pressure rating, main and branch bore sizes, connection details, material requirements, PSL, temperature class, quantity and service conditions. For replacement projects, provide available drawings, photographs, nameplate information and critical interface dimensions.

SGPE manufactures and supplies API 6A Wellhead Tees, Studded Tees, Flanged Tees, Christmas Tree Tees, High Pressure Tree Tees, Sour Service Tees, CRA-Protected Tees and Replacement Tree Tees for 2K, 3K, 5K, 10K and 15K wellhead systems. Send SGPE your API 6A Wellhead Tee RFQ, drawing or technical specification. Our team will review the requirements and provide the corresponding technical proposal and quotation.

E-Mail:
info@sgpe.com