1. Product Overview
Pup joints are short high-pressure flowline sections used in oil drilling and production, cementing and fracturing, testing operations, and high-pressure fluid-transfer systems.
Both ends can be configured with threaded, flanged, union, and other connection types. Specifications cover 1 in to 6 in, with rated working pressure from 2,000 psi to 20,000 psi.
Pup joints are available for standard, low-temperature, and H₂S-containing service, and can be selected according to the field manifold system.
The product series includes Integral Pup Joints, Pressure Seal Pup Joints, NPST Pup Joints, Hammer Union End Pup Joints, Integral Flanged Pup Joints and Welded Flanged Pup Joints.
2. Design Features
Pup joints are designed and manufactured according to relevant API 6A requirements and are suitable for high-pressure flowline systems.
The body is made from high-quality alloy structural steel and treated by strengthening and toughening processes to provide good pressure-bearing strength and impact resistance.
The end-union structure eliminates conventional threaded make-up and provides a safer, more reliable connection.
It is easy to install and remove, provides secure connection, and is suitable for frequent assembly and dismantling of field flowline systems.
Multiple sealing structures and high-precision machining help improve overall flowline sealing performance.
3. Pup Joint Main Technical Parameters
1. Hammer Union End Pup Joint (Pressure Seal Pup Joint, NPST Pup Joint, and Integral Pup Joint) Working Pressure: 6,000 psi to 20,000 psi Nominal Bore: 1″ to 5″ Temperature Class: -29 ℃ to 121 ℃ (PU class)
| Pressure Seal Pup Joint | |||||
|---|---|---|---|---|---|
| Model | Specification | Working Pressure | Length (mm) | Connection Type | Service Condition |
| 2" Fig 602 Pressure Seal, 6,000 psi | 2″ | 6,000 psi | 500, 1000, 1500 2000, 2500, 3000 4000, 5000, 6000 | Fig 602 (M×F) | Standard |
| 2" Fig 602 Pressure Seal, 6,000 psi | Fig 602 (M×M) | ||||
| 2" Fig 602 Pressure Seal, 6,000 psi | Fig 602 (F×F) | ||||
| 3" Fig 602 Pressure Seal, 6,000 psi | 3″ | Fig 602 (M×F) | |||
| 3" Fig 602 Pressure Seal, 6,000 psi | Fig 602 (M×M) | ||||
| 3" Fig 602 Pressure Seal, 6,000 psi | Fig 602 (F×F) | ||||
| 4" Fig 602 Pressure Seal, 6,000 psi | 4″ | Fig 602 (M×F) | |||
| 4" Fig 602 Pressure Seal, 6,000 psi | Fig 602 (M×M) | ||||
| 4" Fig 602 Pressure Seal, 6,000 psi | Fig 602 (F×F) | ||||
| 2" Fig 1002 Pressure Seal, 10,000 psi | 2″ | 10,000 psi | Fig 1002 (M×F) | ||
| 2" Fig 1002 Pressure Seal, 10,000 psi | Fig 1002 (M×M) | ||||
| 2" Fig 1002 Pressure Seal, 10,000 psi | Fig 1002 (F×F) | ||||
| 3" Fig 1002 Pressure Seal, 10,000 psi | 3″ | Fig 1002 (M×F) | |||
| 3" Fig 1002 Pressure Seal, 10,000 psi | Fig 1002 (M×M) | ||||
| 3" Fig 1002 Pressure Seal, 10,000 psi | Fig 1002 (F×F) | ||||
| 2" Fig 1502 Pressure Seal, 15,000 psi | 2″ | 15,000 psi | Fig 1502 (M×F) | ||
| 2" Fig 1502 Pressure Seal, 15,000 psi | Fig 1502 (M×M) | ||||
| 2" Fig 1502 Pressure Seal, 15,000 psi | Fig 1502 (F×F) | ||||
| 3" Fig 1502 Pressure Seal, 15,000 psi | 3″ | Fig 1502 (M×F) | |||
| 3" Fig 1502 Pressure Seal, 15,000 psi | Fig 1502 (M×M) | ||||
| 3" Fig 1502 Pressure Seal, 15,000 psi | Fig 1502 (F×F) | ||||
| NPST Pup Joint | |||||
|---|---|---|---|---|---|
| Model | Specification | Working Pressure | Length (mm) | Connection Type | Service Condition |
| 2" Fig 602, 6,000 psi, NPST | 2″ | 6,000 psi | 500, 1000, 1500 2000, 2500, 3000 4000, 5000, 6000 | Fig 602 (M×F) | Standard |
| 2" Fig 602, 6,000 psi, NPST | Fig 602 (M×M) | ||||
| 2" Fig 602, 6,000 psi, NPST | Fig 602 (F×F) | ||||
| 3" Fig 602, 6,000 psi, NPST | 3″ | Fig 602 (M×F) | |||
| 3" Fig 602, 6,000 psi, NPST | Fig 602 (M×M) | ||||
| 3" Fig 602, 6,000 psi, NPST | Fig 602 (F×F) | ||||
| 4" Fig 602, 6,000 psi, NPST | 4″ | Fig 602 (M×F) | |||
| 4" Fig 602, 6,000 psi, NPST | Fig 602 (M×M) | ||||
| 4" Fig 602, 6,000 psi, NPST | Fig 602 (F×F) | ||||
| 2" Fig 1002, 10,000 psi, NPST | 2″ | 10,000 psi | Fig 1002 (M×F) | ||
| 2" Fig 1002, 10,000 psi, NPST | Fig 1002 (M×M) | ||||
| 2" Fig 1002, 10,000 psi, NPST | Fig 1002 (F×F) | ||||
| 2" Fig 1502-TR100×12, 10,000 psi, NPST | 1000 | Fig 1502-TR100×12（M×M） | |||
| 2" TR100×12, 10,000 psi, NPST | 1500 | TR100×12(M×M) | |||
| 2" TR100×12, 10,000 psi, NPST | 2000 | TR100×12(M×F) | |||
| 3" Fig 1002, 10,000 psi, NPST | 3″ | Fig 1002 (M×F) | |||
| 3" Fig 1002, 10,000 psi, NPST | Fig 1002 (M×M) | ||||
| 3" Fig 1002, 10,000 psi, NPST | Fig 1002 (F×F) | ||||
| 2" Fig 602, 15,000 psi, NPST | 2″ | 15,000 psi | 500, 1000, 1500 2000, 2500, 3000 4000, 5000, 6000 | Fig 602 (M×F) | |
| 2" Fig 1502, 15,000 psi, NPST | Fig 1502 (M×M) | ||||
| 2" Fig 1502, 15,000 psi, NPST | Fig 1502 (F×F) | ||||
| 2" TR100×12, 15,000 psi, NPST | 1000, 1500, 2000 | TR100×12(F×F) | |||
| 3" Fig 1502, 15,000 psi, NPST | 3″ | Fig 1502 (M×F) | |||
| 3" Fig 1502, 15,000 psi, NPST | Fig 1502 (M×M) | ||||
| 3" Fig 1502, 15,000 psi, NPST | Fig 1502 (F×F) | ||||
| H2S Service | |||||
| 2" Fig 602 NACE, 6,000 psi, NPST | 2″ | 6,000 psi | 500, 1000, 1500 2000, 2500, 3000 4000, 5000, 6000 | Fig 602 (M×F) | H2S |
| 2" Fig 602 NACE, 6,000 psi, NPST | Fig 602 (M×M) | ||||
| 2" Fig 602 NACE, 6,000 psi, NPST | Fig 602 (F×F) | ||||
| 3" Fig 602 NACE, 6,000 psi, NPST | 3″ | Fig 602 (M×F) | |||
| 3" Fig 602 NACE, 6,000 psi, NPST | Fig 602 (M×M) | ||||
| 3" Fig 602 NACE, 6,000 psi, NPST | Fig 602 (F×F) | ||||
| 2" Fig 602 NACE, 10,000 psi, NPST | 2″ | 10,000 psi | Fig 602 (M×F) | ||
| 2" Fig 602 NACE, 10,000 psi, NPST | Fig 602 (M×M) | ||||
| 2" Fig 602 NACE, 10,000 psi, NPST | Fig 602 (F×F) | ||||
| 3" Fig 1502 NACE, 10,000 psi, NPST | 3″ | Fig 1502 (M×F) | |||
| 3" Fig 1502 NACE, 10,000 psi, NPST | Fig 1502 (M×M) | ||||
| 3" Fig 1502 NACE, 10,000 psi, NPST | Fig 1502 (F×F) | ||||
| Integral Pup Joint | |||||
|---|---|---|---|---|---|
| Model | Specification | Working Pressure | Length (mm) | Connection Type | Service Condition |
| 2" Fig 602, 6,000 psi | 2″ | 6,000 psi | 500, 600, 1000 1500, 2000, 2500 3000, 3500, 4000 | Fig 602 (M×F) | Standard |
| 2" Fig 602, 6,000 psi | Fig 602 (M×M) | ||||
| 2" Fig 602, 6,000 psi | Fig 602 (F×F) | ||||
| 3" Fig 602, 6,000 psi | 3″ | 500, 600, 1000 1500, 2000, 2500 3000 | Fig 602 (M×F) | ||
| 3" Fig 602, 6,000 psi | Fig 602 (M×M) | ||||
| 3" Fig 602, 6,000 psi | Fig 602 (F×F) | ||||
| 4" Fig 602, 6,000 psi | 4″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 602 (M×F) | ||
| 4" Fig 602, 6,000 psi | Fig 602 (M×M) | ||||
| 4" Fig 602, 6,000 psi | Fig 602 (F×F) | ||||
| 2" Fig 1002, 10,000 psi | 2″ | 10,000 psi | 500, 1000, 1500 2000, 2500, 3000 3500, 4000 | Fig 1002 (M×F) | |
| 2" Fig 1002, 10,000 psi | Fig 1002 (M×M) | ||||
| 2" Fig 1002, 10,000 psi | Fig 1002 (F×F) | ||||
| 2" TR100×12, 10,000 psi | TR100X12(M×F) | ||||
| 2" TR100×12, 10,000 psi | TR100X12(M×M) | ||||
| 2" TR100×12, 10,000 psi | TR100X12(F×F) | ||||
| 3" Fig 1002, 10,000 psi | 3″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 1002 (M×F) | ||
| 3" Fig 1002, 10,000 psi | Fig 1002 (M×M) | ||||
| 3" Fig 1002, 10,000 psi | Fig 1002 (F×F) | ||||
| 4" Fig 1002, 10,000 psi | 4″ | Fig 1002 (M×F) | |||
| 4" Fig 1002, 10,000 psi | Fig 1002 (M×M) | ||||
| 4" Fig 1002, 10,000 psi | Fig 1002 (F×F) | ||||
| 2" Fig 1502, 15,000 psi | 2″ | 15,000 psi | 300, 400, 500, 600 700, 800, 1000, 1200 1500, 1800, 2000 2500, 3000, 3500, 4000 | Fig 1502 (M×F) | |
| 2" Fig 1502, 15,000 psi | Fig 1502 (M×M) | ||||
| 2" Fig 1502, 15,000 psi | Fig 1502 (F×F) | ||||
| 3" Fig 1502, 15,000 psi | 3″ | 15,000 psi | 300, 400, 500, 600 1000, 1500, 1700 2000, 2500, 3000 | Fig 1502 (M×F) | |
| 3" Fig 1502, 15,000 psi | Fig 1502 (M×M) | ||||
| 3" Fig 1502, 15,000 psi | Fig 1502 (F×F) | ||||
| 4" Fig 1502, 15,000 psi | 4″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 1502 (M×F) | ||
| 4" Fig 1502, 15,000 psi | Fig 1502 (M×M) | ||||
| 4" Fig 1502, 15,000 psi | Fig 1502 (F×F) | ||||
| 2" Fig 2002, 20,000 psi | 2″ | 20,000 psi | 200, 300, 400 500, 600, 700 800, 1000, 1500 | Fig 2002 (M×F) | |
| 2" Fig 2002, 20,000 psi | Fig 2002 (M×M) | ||||
| 2" Fig 2002, 20,000 psi | Fig 2002 (F×F) | ||||
| 3" Fig 2002, 20,000 psi | 3″ | 500, 800, 1000 1500, 2000, 2500 | Fig 2002 (M×F) | ||
| 3" Fig 2002, 20,000 psi | Fig 2002 (M×M) | ||||
| 3" Fig 2002, 20,000 psi | Fig 2002 (F×F) | ||||
| H2S Service | |||||
| 2" Fig 602 NACE, 6,000 psi | 2″ | 6,000 psi | 500, 1000, 1500 2000, 2500, 3000 3500, 4000 | Fig 602 (M×F) | H2S |
| 2" Fig 602 NACE, 6,000 psi | Fig 602 (M×M) | ||||
| 2" Fig 602 NACE, 6,000 psi | Fig 602 (F×F) | ||||
| 3" Fig 602 NACE, 6,000 psi | 3″ | 300, 400, 500, 1000, 1500 2000, 2500, 3000 | Fig 602 (M×F) | ||
| 3" Fig 602 NACE, 6,000 psi | Fig 602 (M×M) | ||||
| 3" Fig 602 NACE, 6,000 psi | Fig 602 (F×F) | ||||
| 4" Fig 602 NACE, 6,000 psi | 4″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 602 (M×F) | ||
| 4" Fig 602 NACE, 6,000 psi | Fig 602 (M×M) | ||||
| 4" Fig 602 NACE, 6,000 psi | Fig 602 (F×F) | ||||
| 2" Fig 602 NACE, 7,500 psi | 2″ | 7,500 psi | 500, 1000, 1500 2000, 2500, 3000 3500, 4000 | Fig 602 (M×F) | |
| 2" Fig 602 NACE, 7,500 psi | Fig 602 (M×M) | ||||
| 2" Fig 602 NACE, 7,500 psi | Fig 602 (F×F) | ||||
| 3" Fig 1002 NACE, 7,500 psi | 3″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 1002 (M×F) | ||
| 3" Fig 1002 NACE, 7,500 psi | Fig 1002 (M×M) | ||||
| 3" Fig 1002 NACE, 7,500 psi | Fig 1002 (F×F) | ||||
| 4" Fig 1002 NACE, 7,500 psi | 4″ | Fig 1002 (M×F) | |||
| 4" Fig 1002 NACE, 7,500 psi | Fig 1002 (M×M) | ||||
| 4" Fig 1002 NACE, 7,500 psi | Fig 1002 (F×F) | ||||
| 2" Fig 1502 NACE, 10,000 psi | 2″ | 10,000 psi | 700, 1000, 1500 2000, 2500, 3000 3500, 4000 | Fig 1502 (M×F) | |
| 2" Fig 1502 NACE, 10,000 psi | Fig 1502 (M×M) | ||||
| 2" Fig 1502 NACE, 10,000 psi | Fig 1502 (F×F) | ||||
| 3" Fig 1502 NACE, 10,000 psi | 3″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 1502 (M×F) | ||
| 3" Fig 1502 NACE, 10,000 psi | Fig 1502 (M×M) | ||||
| 3" Fig 1502 NACE, 10,000 psi | Fig 1502 (F×F) | ||||
| 4" Fig 1502 NACE, 10,000 psi | 4″ | Fig 1502 (M×F) | |||
| 4" Fig 1502 NACE, 10,000 psi | Fig 1502 (M×M) | ||||
| 4" Fig 1502 NACE, 10,000 psi | Fig 1502 (F×F) | ||||
| 2" Fig 2002 NACE, 15,000 psi | 2″ | 15,000 psi | 500, 1000, 1500 2000, 2500, 3000 3500, 4000 | Fig 2002 (M×F) | |
| 2" Fig 2002 NACE, 15,000 psi | Fig 2002 (M×M) | ||||
| 2" Fig 2002 NACE, 15,000 psi | Fig 2002 (F×F) | ||||
| 3" Fig 2002 NACE, 15,000 psi | 3″ | 500, 1000, 1500 2000, 2500, 3000 | Fig 2002 (M×F) | ||
| 3" Fig 2002 NACE, 15,000 psi | Fig 2002 (M×M) | ||||
| 3" Fig 2002 NACE, 15,000 psi | Fig 2002 (F×F) | ||||
2. Flanged Pup Joint (Integral Flanged Pup Joint and Welded Flanged Pup Joint) Working Pressure: 6,000 psi to 20,000 psi Nominal Bore: 2 1/16″ to 4 1/16″ Material Class: EE Temperature Class: -29 ℃ to 121 ℃ (PU class)
| Integral Flanged Pup Joint | ||||
|---|---|---|---|---|
| Model | Specification | Working Pressure | Length L (mm) | Ring Gasket No. |
| 2 1/16", 5,000 psi | 2 1/16″ | 5,000 psi | 500, 1000, 1500 2000, 2500, 3000 | R24 |
| 2 9/16", 5,000 psi | 2 9/16″ | R27 | ||
| 3 1/8", 5,000 psi | 3 1/8″ | R35 | ||
| 4 1/16", 5,000 psi | 4 1/16″ | R39 | ||
| 2 1/16", 10,000 psi | 2 1/16″ | 10,000 psi | BX152 | |
| 2 9/16", 10,000 psi | 2 9/16″ | BX153 | ||
| 3 1/8", 10,000 psi | 3 1/16″ | BX154 | ||
| 4 1/16", 10,000 psi | 4 1/16″ | BX155 | ||
| 2 1/16", 15,000 psi | 2 1/16″ | 15,000 psi | BX152 | |
| 2 9/16", 10,000 psi | 2 9/16″ | BX153 | ||
| 3 1/8", 10,000 psi | 3 1/16″ | BX154 | ||
| 4 1/16", 10,000 psi | 4 1/16″ | BX155 | ||
| Welded Flanged Pup Joint | ||||
|---|---|---|---|---|
| Model | Specification | Working Pressure | Length L (mm) | Ring Gasket No. |
| 2 1/16", 5,000 psi | 2 1/16″ | 5,000 psi | 500, 1000, 1500 2000, 2500, 3000 | R24 |
| 2 9/16", 5,000 psi | 2 9/16″ | R27 | ||
| 3 1/8", 5,000 psi | 3 1/8″ | R35 | ||
| 4 1/16", 5,000 psi | 4 1/16″ | R39 | ||
| 2 1/16", 10,000 psi | 2 1/16″ | 10,000 psi | BX152 | |
| 2 9/16", 10,000 psi | 2 9/16″ | BX153 | ||
| 3 1/8", 10,000 psi | 3 1/16″ | BX154 | ||
| 4 1/16", 10,000 psi | 4 1/16″ | BX155 | ||
4. Operation and Maintenance Notes
Before use, check the nameplate information and confirm that the pressure rating, specification, temperature range, and connection type match the field pup joint / flowline system.
Before service and after dismantling or repair, perform hydrostatic testing and seal inspection according to operating procedures. Put the product into high-pressure service only after confirming there is no leakage.
During service, regularly inspect wall thickness, sealing faces, and connection areas. Replace the product promptly if wear, erosion, or insufficient effective wall thickness is found.
Avoid impact, rain exposure, and contact with corrosive media during transportation and storage. Keep products clean and dry, and manage them by specification.
