1. Product Overview
A swivel joint is a high-pressure flowline connector used in cementing, fracturing, acidizing, and well-test lines. It is mainly used to change line direction and improve the flexibility and installation efficiency of high-pressure manifold layouts.
The product uses a ball-bearing swivel structure for smooth rotation within the rated pressure range and is suitable for high-pressure discharge lines, inlet lines, temporary flowlines, and other high-pressure transfer systems.
The long-radius design provides a smooth bore, reducing flow resistance at bends and minimizing erosion wear. For limited installation space or specific low-pressure service, short-radius configurations can also be selected according to site requirements.
The company supplies 2 in to 4 in products rated from 6,000 psi to 20,000 psi for standard and sour-service conditions, with standard and H₂S service long-radius repair kits available.
2. Design Features
Technical parameters and performance are designed and manufactured according to relevant API 6A requirements. Product Specification Level is PSL 3 and Performance Requirement is PR 2. The product can be used with compatible pup joint connectors.
The body is forged from high-strength alloy structural steel. After heat treatment, it provides good pressure-bearing strength, impact resistance, and wear resistance for long-term use in high-pressure oilfield operations.
The 90-degree configuration with hammer union connections offers flexible installation and enables quick tightening, dismantling, transportation, and field storage.
The long-radius series uses a three-row raceway design to withstand higher radial loads and maintain stable rotation under high-pressure transfer and line-vibration conditions.
Connection dimensions match common interfaces used on cementing and fracturing equipment, making flowline selection, replacement, and maintenance easier.
Uniform wall thickness and a smooth flow path help reduce flow resistance, minimize erosion at bends, and extend service life.
HNBR seals combined with a multi-seal structure meet common sealing requirements for pup joint systems.
The metal bleed-off ring and pressure-relief hole design can release pressure in the event of abnormal sealing, reducing pressure build-up in the raceway cavity and improving field safety.
Routine maintenance mainly consists of lubrication and condition inspection, supporting quick field servicing and stable continuous operation.
3. Swivel Joint Main Technical Parameters
1. 90-degree swivel joints are available in Style 10, Style 20, Style 30, Style 50, Style 60, Style 80, and Style 100 configurations. Connection combinations include M×M, F×M, and F×F. Common model and connection combinations include Style 10 (M×M), Style 10 (F×M), Style 20 (F×M), Style 30 (F×M), Style 50 (F×M), Style 50 (F×F), Style 60 (M×M), Style 80 (F×M), Style 100 (F×M), and Style 100 (M×M).
2. Common swivel joint specifications/models and overall dimensions are listed below. Users may select according to working pressure, bore size, connection type, and service conditions.
Style 10 Long-Radius Swivel Joint
| Model | Specification | Working Pressure | Overall Dimensions | Connection Type | Service Condition | ||
|---|---|---|---|---|---|---|---|
| A | B | C | |||||
| 2" Fig 602, Style 10, 6,000 psi, F × M | 2″ | 6,000 psi | 279 | 277 | 273 | Fig 602 (F×M) | Standard |
| 3" Fig 602, Style 10, 6,000 psi, F × M | 3″ | 368 | 368 | 416 | Fig 602 (F×M) | Standard | |
| 3" Fig 602, Style 10, 6,000 psi, M × M | 3″ | 368 | 368 | 416 | Fig 602 (M×M) | Standard | |
| 4" Fig 602, Style 10, 6,000 psi, F × M | 4″ | 408 | 408 | 484 | Fig 602 (F×M) | Standard | |
| 2" Fig 1002, Style 10, 10,000 psi, F × M | 2″ | 10,000 psi | 279 | 277 | 273 | Fig 1002 (F×M) | Standard |
| 3" Fig 1002, Style 10, 10,000 psi, F × M | 3″ | 368 | 368 | 416 | Fig 1002 (F×M) | Standard | |
| 4" Fig 1002, Style 10, 10,000 psi, F × M | 4″ | 408 | 408 | 484 | Fig 1002 (F×M) | Standard | |
| 2" Fig 1502, Style 10, 15,000 psi, F × M | 2″ | 15,000 psi | 279 | 277 | 273 | Fig 1502 (F×M) | Standard |
| 2" Fig 1502, Style 10, 15,000 psi, M × M | 2″ | 279 | 279 | 273 | Fig 1502 (M×M) | Standard | |
| 3" Fig 1502, Style 10, 15,000 psi, F × M | 3″ | 368 | 368 | 416 | Fig 1502 (F×M) | Standard | |
| 3" Fig 1502, Style 10, 15,000 psi, M × M | 3″ | 368 | 368 | 416 | Fig 1502 (M×M) | Standard | |
| 3" Fig 2002, Style 10, 20,000 psi, F × M | 3″ | 20,000 psi | 514 | 516 | 540 | Fig 2002 (F×M) | Standard |
| 2" Fig 602, Style 10, 6,000 psi, F × M, NACE | 2″ | 6,000 psi | 279 | 277 | 273 | Fig 602 (F×M) | H2S |
| 3" Fig 602, Style 10, 6,000 psi, F × M, NACE | 3″ | 368 | 368 | 416 | Fig 602 (F×M) | H2S | |
| 2" Fig 1502, Style 10, 10,000 psi, F × M, NACE | 2″ | 10,000 psi | 279 | 277 | 273 | Fig 1502 (F×M) | H2S |
| 3" Fig 1502, Style 10, 10,000 psi, F × M, NACE | 3″ | 368 | 368 | 416 | Fig 1502 (F×M) | H2S | |
Style 20 Long-Radius Swivel Joint
| Model | Specification | Working Pressure | Overall DimensionsL(mm) | Connection Type | Service Condition |
|---|---|---|---|---|---|
| 2" Fig 602, Style 20, 6,000 psi, F × M | 2″ | 6,000 psi | 283 | Fig 602 (F×M) | Standard |
| 3" Fig 602, Style 20, 6,000 psi, F × M | 3″ | 321 | Fig 602 (F×M) | Standard | |
| 2" Fig 1002, Style 20, 10,000 psi, F × M | 2″ | 10,000 psi | 283 | Fig 1002 (F×M) | Standard |
| 3" Fig 1002, Style 20, 10,000 psi, F × M | 3″ | 321 | Fig 1002 (F×M) | Standard | |
| 4" Fig 1002, Style 20, 10,000 psi, F × M | 4″ | 327.5 | Fig 1002 (F×M) | Standard | |
| 2" Fig 1502, Style 20, 15,000 psi, F × M | 2″ | 15,000 psi | 283 | Fig 1502 (F×M) | Standard |
| 3" Fig 1502, Style 20, 15,000 psi, F × M | 3″ | 321 | Fig 1502 (F×M) | Standard | |
| 3" Fig 2002, Style 20, 20,000 psi, F × M | 3″ | 20,000 psi | 490 | Fig 2002 (F×M) | Standard |
| 2" Fig 602, Style 20, 6,000 psi, F × M, NACE | 2″ | 6,000 psi | 283 | Fig 602 (F×M) | H2S |
| 3" Fig 602, Style 20, 6,000 psi, F × M, NACE | 3″ | 321 | Fig 602 (F×M) | H2S | |
| 2" Fig 1502, Style 20, 10,000 psi, F × M, NACE | 2″ | 10,000 psi | 283 | Fig 1502 (F×M) | H2S |
| 3" Fig 1502, Style 20, 10,000 psi, F × M, NACE | 3″ | 321 | Fig 1502 (F×M) | H2S |
Style 30 Long-Radius Swivel Joint
| Model | Specification | Working Pressure | Overall DimensionsL(mm) | Connection Type | Service Condition | |
|---|---|---|---|---|---|---|
| A | B | |||||
| 2" Fig 602, Style 30, 6,000 psi, F × M | 2″ | 6,000 psi | 281 | 140 | Fig 602 (F×M) | Standard |
| 3" Fig 602, Style 30, 6,000 psi, F × M | 3″ | 368.5 | 202 | Fig 602 (F×M) | Standard | |
| 2" Fig 1002, Style 30, 10,000 psi, F × M | 2″ | 10,000 psi | 281 | 140 | Fig 1002 (F×M) | Standard |
| 3" Fig 1002, Style 30, 10,000 psi, F × M | 3″ | 368.5 | 202 | Fig 1002 (F×M) | Standard | |
| 4" Fig 1002, Style 30, 10,000 psi, F × M | 4″ | 406 | 236 | Fig 1002 (F×M) | Standard | |
| 2" Fig 1502, Style 30, 15,000 psi, F × M | 2″ | 15,000 psi | 281 | 140 | Fig 1502 (F×M) | Standard |
| 3" Fig 1502, Style 30, 15,000 psi, M × M | 3″ | 368.5 | 202 | Fig 1502 (M×M) | Standard | |
| 3" Fig 1502, Style 30, 20,000 psi, F × M | 3″ | 20,000 psi | 524 | 258 | Fig 1502 (F×M) | Standard |
| 2" Fig 602, Style 30, 6,000 psi, F × M, NACE | 2″ | 6,000 psi | 281 | 140 | Fig 602 (F×M) | H2S |
| 3" Fig 602, Style 30, 6,000 psi, F × M, NACE | 3″ | 368.5 | 202 | Fig 602 (F×M) | H2S | |
| 2" Fig 1502, Style 30, 10,000 psi, F × M, NACE | 2″ | 10,000 psi | 281 | 140 | Fig 1502 (F×M) | H2S |
| 3" Fig 1502, Style 30, 10,000 psi, F × M, NACE | 3″ | 368.5 | 202 | Fig 1502 (F×M) | H2S | |
Style 50 Long-Radius Swivel Joint
| Model | Specification | Working Pressure | Overall DimensionsL(mm) | Connection Type | Service Condition | ||
|---|---|---|---|---|---|---|---|
| A | B | C | |||||
| 2" Fig 602, Style 50, 6,000 psi, F × M | 2″ | 6,000 psi | 140 | 277 | 277 | Fig 602 (F×M) | Standard |
| 3" Fig 602, Style 50, 6,000 psi, F × M | 3″ | 202 | 368 | 416 | Fig 602 (F×M) | Standard | |
| 2" Fig 1002, Style 50, 10,000 psi, F × M | 2″ | 10,000 psi | 140 | 277 | 277 | Fig 1002 (F×M) | Standard |
| 3" Fig 1002, Style 50, 10,000 psi, F × M | 3″ | 202 | 368 | 416 | Fig 1002 (F×M) | Standard | |
| 4" Fig 1002, Style 50, 10,000 psi, F × M | 4″ | 236 | 406 | 481 | Fig 1002 (F×M) | Standard | |
| 2" Fig 1502, Style 50, 15,000 psi, F × M | 2″ | 15,000 psi | 140 | 277 | 277 | Fig 1502 (F×M) | Standard |
| 3" Fig 1502, Style 50, 15,000 psi, F × M | 3″ | 202 | 368 | 416 | Fig 1502 (F×M) | Standard | |
| 3" Fig 2002, Style 50, 20,000 psi, F × M | 3″ | 20,000 psi | 258 | 516 | 540 | Fig 2002 (F×M) | Standard |
| 2" Fig 602, Style 50, 6,000 psi, F × M, NACE | 2″ | 6,000 psi | 140 | 277 | 277 | Fig 602 (F×M) | H2S |
| 3" Fig 602, Style 50, 6,000 psi, F × M, NACE | 3″ | 202 | 368 | 416 | Fig 602 (F×M) | H2S | |
| 2" Fig 1502, Style 50, 10,000 psi, F × M, NACE | 2″ | 10,000 psi | 140 | 277 | 277 | Fig 1502 (F×M) | H2S |
| 3" Fig 1502, Style 50, 10,000 psi, F × M, NACE | 3″ | 202 | 368 | 416 | Fig 1502 (F×M) | H2S | |
Style 80 Long-Radius Swivel Joint
| Model | Specification | Working Pressure | Overall DimensionsL(mm) | Connection Type | Service Condition | |||
|---|---|---|---|---|---|---|---|---|
| A | B | C | D | |||||
| 2" Fig 602, Style 80, 6,000 psi, F × M | 2″ | 6,000 psi | 277 | 277 | 273 | 140 | Fig 602 (F×M) | Standard |
| 3" Fig 602, Style 80, 6,000 psi, F × M | 3″ | 416 | 368 | 416 | 202 | Fig 602 (F×M) | Standard | |
| 2" Fig 1002, Style 80, 10,000 psi, F × M | 2″ | 10,000 psi | 277 | 277 | 273 | 140 | Fig 1002 (F×M) | Standard |
| 3" Fig 1002, Style 80, 10,000 psi, F × M | 3″ | 416 | 368 | 416 | 202 | Fig 1002 (F×M) | Standard | |
| 4" Fig 1002, Style 80, 10,000 psi, F × M | 4″ | 406 | 406 | 408 | 236 | Fig 1002 (F×M) | Standard | |
| 2" Fig 1502, Style 80, 15,000 psi, F × M | 2″ | 15,000 psi | 277 | 277 | 273 | 140 | Fig 1502 (F×M) | Standard |
| 3" Fig 1502, Style 80, 15,000 psi, F × M | 3″ | 416 | 368 | 416 | 202 | Fig 1502 (F×M) | Standard | |
| 3" Fig 2002, Style 80, 20,000 psi, F × M | 3″ | 20,000 psi | 540 | 516 | 540 | 258 | Fig 2002 (F×M) | Standard |
| 2" Fig 602, Style 80, 6,000 psi, F × M, NACE | 2″ | 6,000 psi | 277 | 277 | 273 | 140 | Fig 602 (F×M) | H2S |
| 3" Fig 602, Style 80, 6,000 psi, F × M, NACE | 3″ | 416 | 368 | 416 | 202 | Fig 602 (F×M) | H2S | |
| 2" Fig 1502, Style 80, 10,000 psi, F × M, NACE | 2″ | 10,000 psi | 277 | 277 | 273 | 140 | Fig 1502 (F×M) | H2S |
| 3" Fig 1502, Style 80, 10,000 psi, F × M, NACE | 3″ | 416 | 368 | 416 | 202 | Fig 1502 (F×M) | H2S | |
Style 100 Long-Radius Swivel Joint
| Model | Specification | Working Pressure | Overall DimensionsL(mm) | Connection Type | Service Condition | |||
|---|---|---|---|---|---|---|---|---|
| A | B | C | D | |||||
| 2" Fig 602, Style 100, 6,000 psi, F × M | 2″ | 6,000 psi | 273 | 277 | 273 | 279 | Fig 602 (F×M) | Standard |
| 3" Fig 602, Style 100, 6,000 psi, F × M | 3″ | 416 | 368 | 416 | 368 | Fig 602 (F×M) | Standard | |
| 2" Fig 1002, Style 100, 10,000 psi, F × M | 2″ | 10,000 psi | 273 | 277 | 273 | 279 | Fig 1002 (F×M) | Standard |
| 3" Fig 1002, Style 100, 10,000 psi, F × M | 3″ | 416 | 368 | 416 | 368 | Fig 1002 (F×M) | Standard | |
| 4" Fig 1002, Style 100, 10,000 psi, F × M | 4″ | 408 | 406 | 408 | 327.5 | Fig 1002 (F×M) | Standard | |
| 2" Fig 1502, Style 100, 15,000 psi, F × M | 2″ | 15,000 psi | 273 | 277 | 273 | 279 | Fig 1502 (F×M) | Standard |
| 3" Fig 1502, Style 100, 15,000 psi, F × M | 3″ | 416 | 368 | 416 | 368 | Fig 1502 (F×M) | Standard | |
| 3" Fig 2002, Style 100, 20,000 psi, F × M | 3″ | 20,000 psi | 540 | 516 | 540 | 516 | Fig 2002 (F×M) | Standard |
| 2" Fig 602, Style 100, 6,000 psi, F × M, NACE | 2″ | 6,000 psi | 273 | 277 | 273 | 279 | Fig 602 (F×M) | H2S |
| 3" Fig 602, Style 100, 6,000 psi, F × M, NACE | 3″ | 416 | 368 | 416 | 368 | Fig 602 (F×M) | H2S | |
| 2" Fig 1502, Style 100, 10,000 psi, F × M, NACE | 2″ | 10,000 psi | 273 | 277 | 273 | 279 | Fig 1502 (F×M) | H2S |
| 3" Fig 1502, Style 100, 10,000 psi, F × M, NACE | 3″ | 416 | 368 | 416 | 368 | Fig 1502 (F×M) | H2S | |
3. Example: 3" Fig 1502 15,000 psi Style 10 (M×M) 90-Degree Swivel Joint Exploded View and Parts List
| No. | Name | Quantity | No. | Name | Quantity | No. | Name | Quantity |
|---|---|---|---|---|---|---|---|---|
| 1 | WN elbow connector | 1 | 6 | Union seal ring | 3 | 11 | Three-lug wing nut | 2 |
| 2 | Grease retainer ring | 3 | 7 | Packing | 3 | 12 | Ball plug | 6 |
| 3 | WQ straight connector | 1 | 8 | NQ straight connector | 1 | 13 | O-ring | 3 |
| 4 | Steel ball | 297 | 9 | Retaining ring | 2 | 14 | Internal retaining ring | 6 |
| 5 | Grease plug | 9 | 10 | Spring retaining ring | 2 |
4. Swivel Joint Repair Kits and Parts Lists
① Grease retainer ring ② O-ring ③ Packing ④ Internal retaining ring ⑤ Ball plug ⑥ Steel ball ⑦ Grease plug
① Grease retainer ring ② Outer race bushing ③ Inner race bushing ④ O-ring I ⑤ Packing ⑥ Internal retaining ring ⑦ O-ring II ⑧ Ball plug ⑨ Steel ball ⑩ Grease plug
| Standard Service Repair Kit Parts List | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Specification | Grease retainer ring | O-ring | Packing (pcs) | Internal retaining ring (pcs) | Grease plug | Ball plug (pcs) | Steel ball (pcs) | ||
| O-ring | O-ring I | O-ring II | |||||||
| 2″×6,000 psi | 1 | 1 | - | - | 1 | 3 | 1 | 3 | 24（φ3/8″） |
| 3″×6,000 psi | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 3 | 33（φ3/8″） |
| 2″×10,000 psi | 1 | 1 | - | - | 1 | 3 | 1 | 3 | 24（φ3/8″） |
| 3″×10,000 psi | 1 | - | - | - | 1 | 2 | 2 | 3 | 33（φ3/8″） |
| 4″×10,000 psi | 1 | 1 | - | - | 1 | 3 | 1 | 3 | 27（φ1/2″） |
| 2″×15,000 psi | 1 | 1 | - | - | 1 | 3 | 1 | 3 | 24（φ3/8″） |
| 3″×15,000 psi | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 3 | 33（φ3/8″） |
| 3″×20,000 psi | 1 | 1 | - | - | 1 | 3 | 1 | 3 | 27（φ5/8″） |
| H₂S Service Repair Kit Parts List | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Specification | Grease retainer ring (pcs) | O-ring | Outer race bushing (pcs) | Inner race bushing (pcs) | Packing (pcs) | Internal retaining ring (pcs) | Ball plug (pcs) | Steel ball (pcs) | Grease plug | |
| O-ring I | O-ring II | |||||||||
| 2″×6,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 28（φ8） | 1 |
| 3″×6,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 38（φ3/8″） | 1 |
| 2″×10,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 28（φ8） | 1 |
| 3″×10,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 38（φ3/8″） | 1 |
4. Operation and Maintenance Notes
Before use, check the nameplate pressure rating, size, temperature range, and connection type to ensure they match the field service conditions.
Before installation, inspect the connection areas, seals, and swivel mechanism, replenish grease, and confirm smooth rotation without sticking.
Do not dismantle, tighten, or replace seals while the system is under pressure. Never operate beyond the rated working pressure or temperature range.
During service, regularly inspect wall thickness, sealing condition, and rotating parts. Replace the product promptly if wear, deformation, leakage, or sticking is found.
Avoid impact, rain exposure, and corrosive media during transportation and storage. Keep the product in a dry, ventilated area.
