High Pressure Fluid Control Products

Technical Specifications – Pressure, Size, Temperature, and Materials

Parameter	Standard Range	Extended / Custom Options
Pressure Rating	21–140 MPa (3,000–20,000 psi)	Up to 175 MPa (25,000 psi) for specialized applications
Nominal Bore (Valves & Manifolds)	2″, 3″, 4″, 5″	1″ to 6″ on request
Nominal Bore (Flanges)	2-1/16″, 3-1/8″, 4-1/16″, 5-1/8″, 7-1/16″	Up to 13-5/8″ API 6A
Temperature Range	-29°C to +121°C (-20°F to +250°F)	Low temperature (L) down to -46°C; high temperature (U) to +180°C
Material (Valve Bodies)	Low alloy carbon steel (API 6A 75K/60K)	Stainless steel (316, 17-4PH), Inconel, Monel for sour service
Material (Manifold Piping)	Seamless alloy steel – AISI 4130/4140 normalized and tempered	316L stainless steel for corrosion resistance
Trim Material	Standard steel alloy	Tungsten carbide, Stellite, stainless steel for severe service
Sour Service Compliance	NACE MR0175 / ISO 15156 compliant	Full H₂S service up to 140 MPa
End Connections	Hammer union (Fig. 602/1002/1502/2002), API 6A flanges, threaded, integral connections	Custom adapter flanges per customer specification
API Monogram	4F, 6A, 7K, 8C, 16C	All pressure-containing components API-monogrammed
Inspection & Testing	Pressure test to 1.5x working pressure, NDE (MT, UT, PT, RT)	Third-party inspection available (DNV, ABS, Lloyd's, CCS)

Key Technical Advantages – Why SJ High Pressure Products Perform Differently

1. Full-Stack Manufacturing – We Cast, Forge, Machine, Weld, Test, and Assemble

Many fluid control "manufacturers” are assembly houses. They buy cast valve bodies from a foundry, buy trim components from another supplier, and bolt them together. When something fails, you're chasing three different warranties.

SJ is different. We have a complete production facility spanning 296,000 square meters of industrial construction area, equipped with more than 2,100 precision machines including welding, forging, casting, riveting, heat treatment, machining, assembly, and post-treatment lines. We operate dedicated production lines for high pressure manifolds, plunger pumps, gearboxes, masts, drawworks, cylinders, and post-treatment.

That means we own quality from raw steel to finished manifold. No finger-pointing. No "the casting was bad, ask the foundry.”

2. API Certified – 4F, 6A, 7K, 8C, and 16C Monograms

SJ first obtained API monogram authorization in 1994. Since then, we've maintained API certifications for 4F (drilling structures), 6A (wellhead and Christmas tree equipment), 7K (drilling and well servicing equipment), 8C (hoisting equipment), and 16C (choke and kill manifolds). We were the first enterprise in China to obtain the API SPEC 16D logo for choke manifold systems. Additionally, we hold ISO 9001, ISO 14001, OHSAS 18001, and international certifications including CE, ABS, GOST (CU-TR), and OTTC.

What this means for you: Every pressure-containing product carries an API monogram and full material traceability. Your third-party inspector can audit our records from steel mill certificate through final pressure test.

3. Interchangeable with World-Leading Brands – Drop-In Replacement

SJ's high pressure manifolds and components are designed to be dimensionally and functionally interchangeable with leading international brands. If you’re running a manifold from any major Western manufacturer, SJ's unions, valves, fittings, and even complete manifold sections will bolt up with no modification.

This isn’t "close enough.” We maintain exact dimensional specifications to ensure field crews can swap components without specialized adapters or re-work.

4. Pressure Rating Coverage from 21 MPa to 175 MPa – One Supplier for All Pressures

From standard mud manifolds at 21 MPa to ultra-high pressure fracturing components at 175 MPa, SJ covers the entire oilfield pressure range. You don't need three suppliers for different pressure classes. We build components for every pressure rating you’ll encounter – from drilling circulation through well control to hydraulic fracturing.

5. Sour Service & High Temperature Configurations

Standard components are suitable for sweet service. But we also build for the tough environments: H₂S-rich fields (NACE MR0175 fully compliant), high-temperature thermal recovery operations (up to 180°C), and arctic conditions (-46°C low temperature trim). Our sour service components undergo additional hardness testing and use stainless steel or corrosion-resistant alloys in all wetted parts.

6. Fully Traceable Quality System – Backed by Sinopec

Our quality management system includes:

• Raw material certification: Every steel mill certificate logged and retained

• In-process inspection: Visual, dimensional, and NDE at every manufacturing stage – forging/machining/welding/assembly

• Pressure testing: Each component tested to 1.5x working pressure (minimum), with automatic data recording

• Third-party witness: Your inspector or any classification society (DNV, ABS, CCS, Lloyd's) can witness every stage

• Final documentation: Complete traceability package delivered with every product

7. Complete Manifold Engineering – Not Just Valves, But Systems

Many suppliers stop at individual valves and fittings. SJ engineers complete manifold systems – custom layouts designed for your specific equipment and platform constraints. We provide:

• P&IDs and 3D assembly drawings

• Pressure vessel calculations and stress analysis (where applicable)

• Full assembly and testing at our 50,000 m² rig assembly yard

• On-site commissioning support for manifold installation

Applications – Where SJ High Pressure Fluid Control Products Are Used

Application	Products Used	Typical Pressure
Drilling Operations	Mud manifolds, standpipe manifolds, plug valves, hammer unions, swivel joints	21–52 MPa (3,000–7,500 psi)
Cementing	Cementing manifolds, check valves, plug valves, high pressure hose loops	35–70 MPa (5,000–10,000 psi)
Fracturing & Stimulation	Fracturing manifolds, zipper frac systems, plug valves, swivel joints, fracturing quintaplex pumps	70–140 MPa (10,000–20,000 psi)
Well Control	Choke & kill manifolds, gate valves, choke valves, relief valves	35–105 MPa (5,000–15,000 psi)
Well Testing	Wellhead test devices, plug valves, safety relief valves, check valves	21–70 MPa (3,000–10,000 psi)
Coiled Tubing	High pressure hose loops, swivel joints, check valves, plug valves	35–70 MPa
Sand Control & Gravel Packing	High pressure manifolds with abrasive-resistant trim, plug valves	21–52 MPa
Offshore Fixed Platforms	All of the above, with C5-M marine corrosion protection and stainless steel trim	21–105 MPa depending on operation
Snubbing & Live Well Intervention	Choke manifolds, plug valves, check valves, high pressure hose	21–70 MPa

Field-Proven Installations

SJ high pressure fluid control products are not lab experiments. They are in the field, right now:

• Bohai Bay, China: Complete mud manifold systems and choke & kill manifolds on multiple fixed platform drilling rigs

• South China Sea: BOP manifold systems and cementing manifolds for deepwater fixed platforms

• Middle East: Choke manifolds and fracturing components operating under 50°C+ temperatures

• Africa: Cementing manifolds and high pressure fittings for land drilling fleets

• Kazakhstan & Russia: Low-temperature components for arctic operations

• Saudi Arabia: Ultra-large diameter pipes (up to 2,032mm diameter, 18m length) for seawater desalination – 100% qualification rate

OEM Customized Solutions – We Build to Your Spec, Not a Catalog

Because high pressure fluid control requirements vary widely by operation, rig design, and regional standards, SJ treats every manifold and component order as a semi-custom engineering project.

What we customize:

Your Requirement	Our Engineering Solution
Custom pressure rating	Components from 21 MPa up to 175 MPa
Non-standard end connections	Any transition – hammer union to API flange, threaded to welded, metric to imperial
Specific material requirements	Stainless steel, Inconel, Monel, 17-4PH, or other corrosion-resistant alloys
Sour service (H₂S)	NACE MR0175 compliant – all wetted parts undergo hardness testing, non-ferrous trim
Low temperature (arctic)	Special impact-tested materials, low-temp seals, -46°C certification
High temperature (thermal recovery)	High-temp seals and trim materials, up to 180°C continuous operation
Marine / offshore environment	C5-M coating, stainless steel external fittings, 316L wetted parts on request
Space-constrained layouts	Compact manifold design – shoehorning high pressure components into tight platform footprints
Multi-well fracturing (zipper frac)	Custom-designed zipper manifolds with remote-operated plug valves, sized for your pump spread
Integration with existing equipment	Reverse-engineer connection points to match your existing manifold system – no re-piping

How our customization process works:

Step 1 – Requirements: You send us operating pressures, flow rates, fluid type (mud, cement, frac fluid, produced water, etc.), connection types, and space constraints.

Step 2 – Engineering: Our manifold engineering team (dedicated HP Manifold Research Room with specialized engineers) produces a P&ID, 3D model, and bill of materials.

Step 3 – Review: We present the design for your approval, including material selection and API monogram coverage.

Step 4 – Fabrication: Components manufactured on our dedicated manifold production line. All valves and fittings built in-house, not outsourced.

Step 5 – Assembly & testing: Complete manifold assembled and pressure tested to 1.5x working pressure. Your inspector or third-party agency can witness.

Step 6 – Documentation: Full traceability package – mill certificates, NDE reports, pressure test records, API monogram certificates.

Step 7 – Delivery: Skid-mounted manifold ready for installation.

Why Choose SJ Petroleum Machinery for High Pressure Fluid Control Products?

Reason	What You Actually Gain
Sinopec Group ownership	Core equipment manufacturing enterprise of China Petrochemical Corporation. We're not a trading company – we own the factory. Founded 1941, 2,000+ employees, 663,000 m² campus.
Complete in-house manufacturing	2,100+ precision machines covering forging, casting, heat treat, welding, machining, and assembly. We don't outsource critical operations.
Five API monograms	4F, 6A, 7K, 8C, and 16C – with the industry’s first API 16D license in China.
12 families, 168+ component types	Whatever you need – valves, unions, swivels, fittings, complete manifolds – one supplier.
Annual production capacity	150,000 high pressure manifolds plus 700+ pumps, 100 drilling rigs, 100 workover rigs, 120 cementing units, 80 fracturing units.
50,000 m² rig assembly yard	24 rig-up positions, 750-ton test capability. Full manifold load testing before shipment.
Global quality recognition	ISO 9001, ISO 14001, OHSAS 18001, CE, ABS, GOST, OTTC, plus Chinese national certifications.
Third-party inspection ready	Your inspector or DNV, ABS, Lloyd's, CCS can witness manufacturing, testing, and final acceptance.
Complete system solutions	We build the drilling rig AND the manifolds that go on it. Single responsibility from equipment to fluid control.

Frequently Asked Questions (FAQ)

Q1: What API certifications do your high pressure products carry?

A: SJ holds API monograms for 4F (drilling structures), 6A (wellhead equipment), 7K (drilling equipment), 8C (hoisting equipment), and 16C (choke and kill manifolds). We were the first Chinese manufacturer to obtain API 16D certification.

Q2: What pressure ratings are available?

A: Standard products range from 21 MPa (3,000 psi) to 140 MPa (20,000 psi). For specialized applications, we manufacture components up to 175 MPa (25,000 psi).

Q3: Are your products compatible with [brand name] manifolds?

A: Yes – our high pressure manifolds and components are designed for dimensional and functional interchangeability with world-leading brands. Our hammer unions, plug valves, and swivel joints will interface with existing systems.

Q4: How many different types of components do you manufacture?

A: 12 families and over 168 types of high pressure fluid control components, including unions, plug valves, swivel joints, check valves, safety valves, choke valves, gate valves, integral connections, and straight pipes.

Q5: What is your annual production capacity for high pressure manifolds?

A: We can supply over 700 pumps and 150,000 high pressure manifolds annually.

Q6: Can you manufacture manifolds for sour service (H₂S)?

A: Yes – all sour service components are manufactured to NACE MR0175 / ISO 15156 standards with full material certification.

Q7: What sizes do you manufacture?

A: Sizes from 1″ through 6″, with nominal bore standard of 2″–5″ for most components. Larger sizes available for special orders.

Q8: What's the typical lead time for custom manifolds?

A: Standard manifold assemblies: 8–12 weeks. Custom engineered manifolds with non-standard materials: 14–20 weeks. Rush options available.

Q9: Do you provide on-site commissioning support?

A: Yes – our field service engineers can supervise manifold installation, pressure testing, and commissioning on your platform or rig site.

Q10: How do I get a quote?

A: Email hp@sjpetro.com with:

• Operating pressure and flow rate requirements

• Fluid type (drilling mud, cement slurry, fracturing fluid, etc.)

• Connection types needed (hammer union size/fig, API flange, threaded, etc.)

• Any material or sour service requirements

• Rough sketch or P&ID of intended layout

We'll respond within 5–7 working days with a technical proposal and budget estimate.

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