1. Product Overview
A swivel joint is a high-pressure flowline connector for cementing, fracturing, acidizing, and well-test lines. It changes flowline direction while improving flexibility and installation efficiency in high-pressure manifold layouts.
The ball-race structure permits articulation for rig-up and alignment. It is not intended for continuous rotation, and adjustment under pressure is prohibited unless expressly approved for the specific model.
The long-radius design provides a smooth bore to reduce bend resistance and erosion. Short-radius configurations are also available where installation space is limited or the service pressure allows.
Sizes cover 2 in to 4 in, with cold working pressures from 6,000 psi to 20,000 psi. Standard- and sour-service configurations use different pressure ratings and material/seal selections; for sour service, materials must be verified against NACE MR0175/ISO 15156 for the stated environment. Matching repair kits are available by model.
2. Design Features
The swivel joint is manufactured and tested to the approved product specification. API 6A flanged interfaces, where supplied, follow the applicable API Spec 6A dimensional requirements; this does not assign an API 6A PSL or PR to the complete swivel joint.
The body is forged from the specified alloy steel and heat-treated to the required mechanical-property and impact-toughness values for the rated service.
The 90-degree articulated body provides a direction change during rig-up, while hammer-union ends support make-up and break-out after the line is isolated and depressurized.
The long-radius series uses a multi-row raceway to carry the specified radial and bending loads while allowing articulation for rig-up. This does not authorize continuous rotation or repositioning under pressure.
Connection compatibility must be verified by nominal size, Fig designation, CWP, seal profile and approved mating dimensions.
The forged pressure boundary and smooth bore are designed for the stated flowline duty; bend-area erosion and minimum remaining wall thickness require periodic inspection.
HNBR and other seal materials are supplied by ordered temperature, fluid and service environment.
A cavity vent/bleed feature may indicate or release trapped raceway-cavity pressure for the specified design. It is not a process relief valve; follow the model-specific isolation and depressurization procedure before maintenance.
Routine maintenance includes lubrication, seal inspection, raceway inspection and confirmation of free articulation in accordance with the model-specific procedure.
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 | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Service | ||
|---|---|---|---|---|---|---|---|
| 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 | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Service |
|---|---|---|---|---|---|
| 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 | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Service | |
|---|---|---|---|---|---|---|
| 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 2002, Style 30, 20,000 psi, F × M | 3″ | 20,000 psi | 524 | 258 | Fig 2002 (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 | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Service | ||
|---|---|---|---|---|---|---|---|
| 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 | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Service | |||
|---|---|---|---|---|---|---|---|---|
| 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 | Nominal Size | Cold Working Pressure | Overall Dimensions (mm) | Connection Type | Service | |||
|---|---|---|---|---|---|---|---|---|
| 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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size × CWP | 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 (Ø3/8″) |
| 3″×6,000 psi | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 3 | 33 (Ø3/8″) |
| 2″×10,000 psi | 1 | 1 | — | — | 1 | 3 | 1 | 3 | 24 (Ø3/8″) |
| 3″×10,000 psi | 1 | — | — | — | 1 | 2 | 2 | 3 | 33 (Ø3/8″) |
| 4″×10,000 psi | 1 | 1 | — | — | 1 | 3 | 1 | 3 | 27 (Ø1/2″) |
| 2″×15,000 psi | 1 | 1 | — | — | 1 | 3 | 1 | 3 | 24 (Ø3/8″) |
| 3″×15,000 psi | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 3 | 33 (Ø3/8″) |
| 3″×20,000 psi | 1 | 1 | — | — | 1 | 3 | 1 | 3 | 27 (Ø5/8″) |
| H₂S Service Repair Kit Parts List | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size × CWP | 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 (Ø8 mm) | 1 |
| 3″×6,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 38 (Ø3/8″) | 1 |
| 2″×10,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 28 (Ø8 mm) | 1 |
| 3″×10,000 psi | 1 | 1 | 1 | 3 | 3 | 1 | 3 | 3 | 38 (Ø3/8″) | 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 swivel joint promptly if wear, deformation, leakage, or sticking is found.
During transportation and storage, avoid impact, rain exposure, and corrosive media. Keep swivel joints clean, dry, and well ventilated.
