Fluid control specifications
Technical Specifications – Fluid Control Product Data
The following tables provide specifications for our primary fluid control product categories. For detailed dimensional drawings and material certifications, please contact our engineering team.
High-Pressure Manifolds – General Specifications
| Parameter | Low Pressure | Medium Pressure | High Pressure | Ultra-High Pressure |
|---|---|---|---|---|
| Pressure rating (psi) | 2,000–3,000 | 5,000–7,500 | 10,000–15,000 | 15,000–20,000 |
| Pressure rating (MPa) | 14–21 | 35–52 | 70–105 | 105–140 |
| Nominal bore sizes | 2″ – 3″ | 2″ – 4″ | 2″ – 5″ | 3″ – 4″ |
| API standard | API 6A (PSL 1–2) | API 6A/16C (PSL 2–3) | API 6A/16C (PSL 3–4) | API 6A/16C (PSL 4) |
| Material class | AA–BB (non-corrosive) | BB–DD (sweet service) | DD–HH (sour service) | EE–HH (severe sour) |
| Temperature class | P (-29°C to +82°C) | P / L (-46°C to +82°C) | L / U (-46°C to +121°C) | X / Y (up to +345°C) |
| Connection type | Fig 206, Fig 100 | Fig 1502, FIG 602 | Fig 1502, FIG 2002 | FIG 2002, FIG 2202 |
| PR level | PR1 | PR1 | PR2 (gas-tested) | PR2 (gas-tested) |
Plug Valve Series – Specifications
| Model | OD / Size | Connection | Working Pressure (psi) | Working Pressure (MPa) | Application |
|---|---|---|---|---|---|
| 2″ standard | 50.8 mm (2.0″) | FIG 1502 | 5,000–10,000 | 35–70 | Standard fracturing/cementing |
| 2″ LW | 50.8 mm (2.0″) | FIG 1502 | 10,000–15,000 | 70–105 | Non-shock cold working |
| 2″ 1502 | 50.8 mm | FIG 1502 | 10,000–15,000 | 70–105 | High-rate stimulation |
| 3″ 1502 | 76.2 mm | FIG 1502 | 10,000–15,000 | 70–105 | Fracturing manifold service |
| 4″ 1502 | 101.6 mm | FIG 1502 | 10,000–15,000 | 70–105 | Large-bore fracturing |
| 2‑1/16″ | 52.4 mm | API 6A flange | 2,000–15,000 | 14–105 | Wellhead/Christmas tree |
| 4‑1/16″ | 103.1 mm | API 6A flange | 2,000–15,000 | 14–105 | Large-bore well control |
Plug valve specifications: all quarter-turn isolation valves; precision-machined components for reliable sealing; low-torque design; replaceable seal kits available.
Choke Valve Series – Specifications
| Parameter | Fixed Choke | Adjustable Choke | Cage Choke |
|---|---|---|---|
| Nominal bore | 2‑1/16″ – 4‑1/16″ | 2‑1/16″ – 4‑1/16″ | 2‑1/16″ – 3‑1/8″ |
| Pressure rating | 2,000–15,000 psi | 2,000–15,000 psi | 5,000–15,000 psi |
| API standard | API 6A / 16C | API 6A / 16C | API 6A / 16C |
| Trim material | Tungsten carbide | Tungsten carbide / Ceramic | Tungsten carbide |
| Erosion resistance | High (fixed orifice) | Moderate–high (variable) | Very high (cage design) |
| Adjustment mechanism | N/A (change choke bean) | Needle/threaded stem | Rotating cage |
| Typical application | Well testing, choke manifold | Well control, fracturing | High-erosion service |
Combination Manifolds – Common Configurations
| Manifold Type | Nominal Bore | Pressure Rating | Typical Applications |
|---|---|---|---|
| Choke and kill manifold | 2″ – 5″ | 5,000–15,000 psi | Well control, blowout prevention, circulating bottomhole fluids |
| Drilling mud manifold | 3″ – 5″ | 3,000–7,500 psi | Pump suction, ground distribution, standpipe |
| Cementing manifold | 2″ – 3″ | 5,000–10,000 psi | Cement truck/skid integration |
| Fracturing manifold skid (dual-channel) | 3″ – 4″ | 10,000–15,000 psi | High-rate hydraulic fracturing (≤93 MPa pump pressure) |
| Fracturing manifold skid (triple-channel) | 3″ – 4″ | 15,000–20,000 psi | Ultra-high-pressure fracturing (above 93 MPa) |
| High/low pressure combination manifold | Mixed | Mixed | Acidizing/fracturing with low-pressure chemical injection |
| BOP manifold system | 2″ – 3″ | 3,000–10,000 psi | Annular and ram BOP control |
| Wellhead test device | 2″ – 5″ | 5,000–15,000 psi | Flow testing, production testing |
"SJ has already supplied hundreds of complete set of drilling mud manifolds, choke & kill manifolds, BOP manifold system, and cementing manifolds for offshore rigs.”
Swivel Joint – Specifications
| Parameter | Standard Swivel | High-Pressure Swivel | Sour Service Swivel |
|---|---|---|---|
| Bore size | 2″ – 3″ | 2″ – 4″ | 2″ – 3″ |
| Pressure rating | 3,000–10,000 psi | 10,000–15,000 psi | 5,000–10,000 psi |
| Connection | FIG 1502 / 206 | FIG 1502 / 2002 | FIG 1502, H₂S-resistant |
| Ball material | Chrome-plated carbon steel | Stainless steel | Inconel / Monel |
| Seal material | Nitrile | Viton / Aflas | HNBR / FFKM (H₂S-resistant) |
| Temperature range | -20°C to +82°C | -29°C to +121°C | -29°C to +93°C |
Swivel joints are available in multiple configurations — long-radius, short-radius, and multi-joint articulated assemblies for manifold flexibility.
Kelly Cock / Drill Pipe Safety Valve – Specifications
| Model | OD (mm / in) | Connection | ID (mm / in) | Working Pressure |
|---|---|---|---|---|
| Upper Kelly Cock – standard | 86 mm (3‑3/8″) | NC26 | 30 mm (1‑3/16″) | 5,000–10,000 psi |
| Upper Kelly Cock – high pressure | 86 mm (3‑3/8″) | NC26 | 30 mm | 10,000–15,000 psi |
| Lower Kelly Cock (API) | As per pipe size | Rotary shouldered | Full bore | 5,000–15,000 psi |
*Kelly valves are manually operated ball-type valves located within the drill string. They allow free passage of drilling fluid without pressure loss when open and provide effective blowout or mud loss control when closed. Available in 5,000 psi, 10,000 psi, and 15,000 psi working pressure ratings.*
Product Types – Fluid Control Equipment Portfolio
Our fluid control products are organized into the following categories:
1. High-Pressure Fluid Control Components (168 Types)
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Unions (Fig 100, Fig 1502, Fig 2002, Fig 206)
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Plug valves (low-torque, quarter-turn, replaceable seat)
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Swivel joints (standard, high-pressure, multi-joint)
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Check valves (spring-loaded, swing-check, ball-check)
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Safety valves (overpressure relief)
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Choke valves (adjustable, fixed, cage)
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Gate valves (API 6A slab and expanding gate)
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Integral connections and crossovers
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Straight pipes and nipples
2. Combination Manifolds (100+ Configurations)
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Choke and kill manifolds (Class A manufacturer for CNPC)
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Drilling mud manifolds (pump, ground, standpipe)
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Cementing manifolds
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Fracturing manifold skids (dual-channel, triple-channel)
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BOP manifold systems
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High/low pressure combination manifolds
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Wellhead test devices
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Wax bead and chemical injection manifolds
3. Well Control Equipment
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Choke and kill manifolds (surface and subsea)
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Articulated choke and kill lines
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BOP control manifolds
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Wellhead test devices
4. Drill String Fluid Control Valves
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Kelly cocks (upper and lower)
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Drill pipe safety valves
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Float valves (non-return valves)
Application Fields – Where Our Fluid Control Specifications Are Used
🛢️ Drilling Operations
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Mud circulation manifolds on drilling rigs — directing drilling fluid from mud pumps to standpipe and down the drill string
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Standpipe manifolds — controlling flow rate and pressure to the top drive
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BOP manifolds — supplying hydraulic control fluid to annular and ram BOPs
💥 Well Control and Blowout Prevention
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Choke and kill manifolds — the primary well control system that allows controlled release of pressure during a kick or well control event
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Articulated choke and kill lines — flexible connections for mud gas separators and flare lines
🔧 Hydraulic Fracturing and Stimulation
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Fracturing manifold skids — distributing proppant-laden fracturing fluid from pump trucks to the wellhead at pressures up to 15,000–20,000 psi
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Plug valves and high-pressure connections — rated for the erosive wear of sand-laden fracturing fluids
⚡ Cementing Operations
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Cementing manifolds — mixing and distributing cement slurry from mixing units to the wellhead
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Check valves — preventing backflow when setting cement plugs
📊 Well Testing and Flow Evaluation
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Wellhead test devices — controlling flow rate during production testing
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Choke manifolds — regulating wellhead pressure and flow during flowback
🌊 Offshore Platforms and Rigs
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Offshore-combination manifolds supplied to Philips, Kerr-McGee, Nanbao, and Weizhou platforms — as well as the Luda 6000m modular rig and offshore rigs exported to Cuba
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Subsea choke and kill systems meeting API 16C requirements
🧊 Arctic and High-Temperature Environments
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Low-temperature material class rated to -46°C for Siberian and Canadian Arctic drilling
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High-temperature material class rated to +345°C for thermal recovery and steam injection wells
Why Choose SJ Petro for Fluid Control Specifications?
🏭 API 6A & 16C Certification – The Industry Standard
SJ Petro holds API 6A and 16C certifications, along with production licenses for National Special Equipment and drilling fluid manifolds. We are ranked No.1 in the SINOPEC group for well control equipment manufacturing and are the only Class A manufacturer of choke and kill manifolds for CNPC — a distinction that speaks to our quality and reliability.
As one of China Top 500 manufacturers, we are rated AAA by China Petrochemical Industry and Banks and hold API, ISO9001, and HSE management system certifications.
🔧 Over 40 Years of Fluid Control Engineering Experience
SJ Petro began manufacturing petroleum drilling and production equipment in the late 1970s. Our Manifold Branch has dedicated engineering staff, including a HP Manifold Research Room, and we have successfully supplied hundreds of complete manifold systems for both land and offshore rigs.
🌍 Global Export Track Record – Interchangeable with World-Leading Brands
Our high-pressure manifolds and fluid control products are dimensionally and functionally interchangeable with world-leading manifolds from American and European manufacturers. They are currently in use on rigs and well service equipment in China, Russia, Kazakhstan, the United States, Canada, the Middle East, Cuba, and offshore platforms worldwide.
📦 One-Stop Supply – 12 Component Families + 100+ Manifold Configurations
You do not need to source unions from one supplier, valves from another, and manifold assemblies from a third. SJ Petro manufactures the entire high-pressure fluid control system — from individual components to fully assembled manifold skids — under one roof.
🧪 Custom Engineering for Special Applications
Need a non-standard manifold configuration? Operating under extreme temperature or sour service conditions? Require special material certifications for H₂S service? Our engineering team can design and manufacture custom fluid control assemblies to meet your specific well environment and pressure rating requirements.
Frequently Asked Questions (FAQ)
Q1: What API standards do your fluid control products meet?
A: Our high-pressure fluid control products are manufactured to API 6A (specification for wellhead and tree equipment) and API 16C (specification for choke and kill equipment). The API 6A:2018 standard covers design, materials, testing, inspection, marking, and storage requirements for up to 14 equipment types, defining four Product Specification Levels (PSL 1-4), 8 material classes (AA-HH), and temperature/pressure ratings. API 16C covers surface and subsea choke and kill equipment for drilling operations.
Q2: What pressure ratings do you offer?
A: We manufacture components and manifolds rated from 2,000 psi through 20,000 psi (14 MPa through 140 MPa). Standard drilling and fracturing manifolds are typically 5,000 psi to 15,000 psi, with ultra-high-pressure systems available at 20,000 psi (140 MPa) for HP/HT wells.
Q3: What is the difference between API 6A and API 16C?
A: API 6A applies to wellhead equipment, trees, valves, flanges, and other components used in producing wells and for well control at the surface. API 16C applies specifically to choke and kill manifolds and articulated lines used during drilling for well control — handling higher flows and more dynamic operating conditions. We hold certifications for both standards.
Q4: What are PSL levels, and why do they matter?
A: Product Specification Levels (PSL) define the rigor of design, material, and testing requirements. PSL 1 is the least rigorous (suitable for low-risk wells). PSL 2 adds additional material testing. PSL 3 and PSL 4 include more stringent design validation, nondestructive examination, and documentation requirements. For HP/HT and sour service wells, higher PSL levels (3 or 4) are often required. We supply PSL 2 through PSL 4, with customer-specified material classes.
Q5: Do your products work with equipment from other manufacturers?
A: Yes. Our high-pressure fluid control components are designed for dimensional and functional interchangeability with world-leading manifolds from American manufacturers (SPM, FMC, NOV, etc.). Same flange patterns, same hub dimensions, same connection types, same pressure ratings. You can replace a failed component from another brand with our part without modifying the manifold layout.
Q6: What material classes do you offer for sour service (H₂S)?
A: We manufacture to material classes EE, FF, and HH for sour service applications. HH is the highest sour service class, suitable for wells with up to 20% H₂S by volume. Material traceability from mill certification through final heat treatment is maintained, and we can provide third-party verification of chemical and mechanical properties upon request.
Q7: Can you build custom manifolds for my specific wellsite layout?
A: Absolutely. Our Manifold Branch has designed and manufactured over 100 different types of combination manifolds for drilling, cementing, fracturing, well testing, and offshore operations. We take your wellsite layout, piping requirements, and equipment connections and design a custom manifold assembly that minimizes connection points, leak risks, and pressure drop. Contact our engineering team with your specifications.
Q8: What is the typical lead time for high-pressure fluid control products?
A: Lead times vary by product and current order volume:
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Standard valves and fittings: 6–8 weeks
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Custom combination manifolds: 12–16 weeks, depending on complexity
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Large-scale fracturing manifold skids: 16–20 weeks
Expedite options are available for priority orders. We recommend ordering 12 months ahead of your planned operation for large-scale manifold systems.
Q9: Do you provide certifications for international shipping and customs?
A: Yes. Every product shipment includes a complete certification package: material test reports (mill certificates), dimensional inspection reports, hydrostatic test certificates, API monogram license documentation, and any applicable third-party inspection certificates. For Russian/Eurasian markets, we can provide GOST certification packages upon request.
Q10: What is your warranty policy on fluid control products?
A: Our standard warranty is 12 months from date of shipment against defects in material and workmanship. Warranty covers repair or replacement of defective parts; it does not cover damage from misuse, improper installation, erosion from abrasive fluids beyond specified parameters, or failure due to operation above rated pressure/temperature.
