Description
pup joints
- High pressure straight pipes have four different types: pressure seal, non-pressure seal, integral type and welding type.
- We can provide 1″~4″ and 1000psi to 15000psi(7MPa to 105MPa) straight pipes. 1m, 1.5m, 2m, 2.5m, 2.8m long integral straight pipes are available. We also provide HP straight pipes with other sizes and pressure ratings as per customers’ requirements.
- First the model of Pressure Seal Type: FIG402 union, FIG602 union, FIG1002 union and FIG1502 union. rated:4000psi(28MPa)~15000psi(105MPa).
- Second the model of Non-pressure Seal Type: FIG206 union, FIG602 union,FIG1002 union and FIG1502 union; rated: 2000psi(14MPa)~15000psi(105MPa).
- Third the model of Conventional Integral Type: FIG602 union, FIG1002 union and FIG1502 union; rated: 6000psi(42MPa)-15000psi(105MPa).
- Fourth the model of Integral Type for H2S environment: FIG602 union, FIG1002 union and FIG1502 union; rated: 5000psi(35MPa)-10000psi(70MPa).
- Fifth the model of Welded Union Type: FIG402 union, Tr union in metric, FIG602 union, FIG1002 union, FIG1502 union; rated: 4000psi(28MPa)-15000psi(105MPa).
- The model of Welded Flange Type: 21/16″flange, 29/16″flange, 31/8″flange, 41/16″flange, 31/16″flange; rated: 3000psi(21MPa)-15000psi(105MPa).
| Description | End Connection FIG | Rated WP | Size(inch) | ||||
|---|---|---|---|---|---|---|---|
| 1” | 1-1/2” | 2” | 3” | 4” | |||
| Pressure Seal Type | 402 union | 4000psi(28MPa) | √ | √ | √ | √ | |
| 602 union | 6000psi(42MPa) | y | y | y | y | ||
| 1002 union | 10000si(70MPa) | y | y | y | y | y | |
| 1502 union | 15000psi(105MPa) | y | y | y | y | ||
| Non–pressure Seal Type | 206 union | 2000psi(14MPa) | y | y | y | ||
| 602 union | 6000psi(42MPa) | y | y | y | |||
| 1002 union | 10000psi(70MPa) | y | y | y | y | ||
| 1502 union | 15000psi(105MPa) | y | y | y | |||
| Conventional Integral Type | 602 union | 6000psi(42MPa) | y | y | y | ||
| 1002 union | 10000psi(70MPa) | y | y | y | |||
| 1502 union | 15000psi(105MPa) | y | y | y | |||
| Integral Type for H2S environment | 602 union | 5000psi(35MPa) | y | y | y | ||
| 1002 union | 7500psi(53MPa) | y | y | y | |||
| 1502 union | 10000psi(70MPa) | y | y | y | |||
| Welded Union Type | 402 union | 4000psi(28MPa) | √ | √ | √ | ||
| Tr union in metric | 5000psi(35MPa) | √ | √ | y | |||
| 602 union | 6000psi(42MPa) | √ | √ | √ | |||
| 1002 union | 10000psi(70MPa) | √ | √ | √√ | |||
| 1502 union | 15000psi(105MPa) | √ | √ | √ | |||
| Welded Flange Type | 2-1/16” flange | 3000,5000,10000,15000psi(21,35,70,105MPa) | √ | ||||
| 2-9/16” flange | 3000,5000,10000,15000psi(21,35,70,105MPa) | √ | √ | ||||
| 3-1/8” flange | 3000,5000psi(21,35MPa) | √ | |||||
| 4-1/16” flange | 3000,5000,10000,15000psi(21,35,70,105MPa) | √ | |||||
| 3-1/16” flange | 10000,15000psi(70,105MPa) | ||||||
FAQ – Pup Joints (High Pressure Straight Pipes)
1) What are pup joints (high pressure straight pipes) used for?
Pup joints, also called high pressure straight pipes, are used to connect and extend high-pressure flowlines and manifolds in oilfield applications such as well testing, cementing, and fracturing operations. They help operators achieve the required spacing and routing while maintaining a reliable pressure-containing connection.
2) What sizes and pressure ratings do you supply for high pressure pup joints?
We supply high pressure pup joints in 1″ to 4″ sizes with pressure ratings from 1000 psi to 15000 psi (7 MPa to 105 MPa). Other sizes and pressure ratings can be manufactured according to customer requirements.
3) What types of high pressure straight pipes (pup joints) do you offer?
We offer multiple types of high pressure straight pipes, including:
-
Pressure Seal Type
-
Non-Pressure Seal Type
-
Conventional Integral Type
-
Integral Type for H₂S (sour service) environment
-
Welded Union Type
-
Welded Flange Type
This range helps match different field conditions, connection preferences, and service environments.
4) Which union models are available for Pressure Seal Type pup joints?
For Pressure Seal Type pup joints, available union models include:
-
FIG402 union
-
FIG602 union
-
FIG1002 union
-
FIG1502 union
Pressure ratings typically cover 4000 psi (28 MPa) to 15000 psi (105 MPa) depending on the selected model.
5) Which union models are available for Non-Pressure Seal Type pup joints?
For Non-Pressure Seal Type pup joints, available union models include:
-
FIG206 union
-
FIG602 union
-
FIG1002 union
-
FIG1502 union
Pressure ratings typically cover 2000 psi (14 MPa) to 15000 psi (105 MPa) depending on the selected model.
6) What is a conventional integral pup joint and what is its pressure range?
A conventional integral pup joint is a one-piece (integral) high pressure straight pipe design commonly used in high-pressure flowline and manifold service. Available models include FIG602, FIG1002, and FIG1502, with typical ratings from 6000 psi (42 MPa) to 15000 psi (105 MPa).
7) Do you supply integral pup joints for H₂S (sour service) environments?
Yes. We supply integral pup joints for H₂S environments (sour service). Available models include FIG602, FIG1002, and FIG1502, with typical pressure ratings of 5000 psi (35 MPa) to 10000 psi (70 MPa). Sour service requirements can be matched to project specifications.
8) What is the welded union type pup joint and what connections are available?
Welded union type pup joints are designed for applications where a welded connection is required while still using union-style end connections. Available models include:
-
FIG402 union
-
Tr union (metric)
-
FIG602 union
-
FIG1002 union
-
FIG1502 union
Typical pressure ratings range from 4000 psi (28 MPa) to 15000 psi (105 MPa) depending on configuration.
9) What flange sizes are available for welded flange type high pressure straight pipes?
For welded flange type high pressure straight pipes, available flange sizes include:
-
2-1/16″ flange
-
2-9/16″ flange
-
3-1/8″ flange
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4-1/16″ flange
-
3-1/16″ flange
Typical pressure ratings range from 3000 psi (21 MPa) to 15000 psi (105 MPa) depending on flange size and class.
10) What standard lengths are available for integral straight pipes (pup joints)?
We offer integral straight pipes in standard lengths including 1m, 1.5m, 2m, 2.5m, and 2.8m. Custom lengths can also be supplied to meet specific field layout and manifold spacing requirements.
11) Can you manufacture pup joints with custom size, pressure rating, and length?
Yes. In addition to standard configurations, we can provide custom pup joints with non-standard sizes, pressure ratings, and lengths based on customer requirements, including special connection preferences (union or flange) and service conditions.
12) What information is needed to select the right pup joint for my project?
To ensure correct selection and quick quotation, please provide:
size (1″–4″), working pressure (1000–15000 psi), type (pressure seal / non-pressure seal / integral / welded), union or flange model (e.g., FIG1502), required length, service condition (standard or H₂S), and quantity.
