Pipe Fittings

Industrial Pipe Fittings Manufacturer & OEM Supplier

We supply carbon steel, stainless steel, alloy steel, and forged pipe fittings for industrial piping systems, process plants, water treatment facilities, and mechanical equipment. Product options include butt-weld elbows, tees, reducers, caps, forged threaded fittings, and socket-weld fittings in a range of sizes, material grades, wall thicknesses, and end connections.
For project procurement and distribution orders, specifications can be reviewed against the applicable ASME, ASTM, MSS, or EN requirements. Material documentation, inspection reports, testing, and custom manufacturing options should be confirmed according to the selected product, purchase specification, and order requirements.

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Product Range

Product Type	Available Configurations	Key Selection Parameters	Applicable Standards to Confirm
Butt-Weld Elbows	45°, 90°, 180°, short-radius (SR) and long-radius (LR)	NPS/DN, schedule, material grade, radius, end preparation	ASME B16.9; applicable material specifications
Equal and Reducing Tees	Equal tees and reducing tees	Run and branch sizes, wall thickness, material grade	ASME B16.9 or applicable project standard
Concentric and Eccentric Reducers	Concentric and eccentric designs	Large and small end sizes, length, wall thickness, orientation	ASME B16.9 or applicable project standard
Pipe Caps	Butt-weld end caps	Pipe size, schedule, material, forming and heat treatment requirements	ASME B16.9 or applicable project standard
Forged Threaded Fittings	Elbows, tees, couplings, unions and other configurations	Size, pressure class, thread type and material	ASME B16.11 and applicable material specifications
Forged Socket-Weld Fittings	Socket-weld elbows, tees, couplings and related fittings	Size, pressure class, socket dimensions and material	ASME B16.11 and applicable material specifications
Malleable Iron Fittings	Elbows, tees, unions, couplings and adapters	Nominal size, fitting configuration, thread standard and pressure requirements	Applicable standards, such as ASME B16.3, where specified

Materials and Technical Specifications

Material Group	Example Grades	Key Procurement Considerations
Carbon Steel	ASTM A234 WPB, WPC	Material specification, wall thickness, forming and heat treatment requirements
Low-Temperature Carbon Steel	ASTM A420 WPL6, WPL3	Minimum design temperature, required impact properties and test temperature
Stainless Steel	ASTM A403 WP304/304L, WP316/316L, WP321, WP347	Corrosion conditions, grade, heat treatment and applicable supplementary tests
Duplex and Super Duplex Stainless Steel	UNS S31803 (2205), UNS S32750 (2507)	Grade verification, corrosion requirements, heat treatment and project-specific testing
Alloy Steel	ASTM A234 WP5, WP9, WP11, WP22, WP91	Service temperature, material grade, heat treatment and applicable inspection requirements
Forged Carbon Steel	ASTM A105, where applicable to the fitting product specification	Forging grade, fitting standard, pressure class and material documentation

Dimensional and End-Preparation Requirements

Dimensions: Confirm center-to-end dimensions, outside diameter, fitting angle, branch dimensions, and other requirements against the applicable product standard and approved drawing.

Wall thickness: Specify the required schedule or nominal wall thickness. Acceptance criteria for minimum wall thickness must follow the applicable standard and purchase specification.

Bevel preparation: Butt-weld ends may be prepared to ASME B16.25 where specified. Bevel angle, root face, and end preparation must be confirmed for the actual wall thickness and welding requirements.

Roundness and alignment: Dimensional tolerances should be stated according to the applicable fitting standard and inspection requirements.

Custom dimensions: Non-standard diameters, heavy-wall configurations, and special end preparations require engineering review before acceptance.

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Manufacturing and Quality Control

The manufacturing route depends on the fitting type, material, size, and production method. A typical route for formed or forged fittings may include:
Raw Material Verification → Forming or Forging → Heat Treatment, Where Required → Machining and Bevel Preparation → Dimensional Inspection → Specified NDT and Mechanical Testing → Marking and Final Inspection → Packaging and Documentation.

Inspection and Testing Options
Positive Material Identification (PMI): Handheld XRF analyzers verify alloy content before and after machining.

Non-Destructive Testing (NDT): Radiographic Testing (RT) on welded seams, Ultrasonic Testing (UT) on raw pipe stock, and Magnetic Particle Inspection (MT) on forged surfaces.

Mechanical & Metallurgical Testing: Tensile strength, yield point, elongation, Charpy V-notch impact testing at low temperatures (-46°C), and hardness testing.

Dimensional Inspection: Coordinate measuring machines (CMM) and digital calipers verify wall thickness, center-to-end dimensions, and bevel angles.

Traceability: Heat numbers are hard-stamped on each fitting and linked directly to EN 10204 3.1 Mill Test Reports (MTR).

Customization and Supply Options

Custom Wall Thicknesses & Non-Standard Diameters

Heavy-wall fittings up to 80mm wall thickness and custom reductions.

Surface Treatments

Hot-dip galvanizing (ASTM A153), black phosphate coating, anti-corrosion varnish, epoxy lining, and pickling/passivation for stainless steel.

End Connections

Threaded (NPT, BSPT, BSPP), Socket-Weld, Flanged transition ends, and custom weld prep angles.

Packaging & Logistics

ISPM 15 compliant wooden cases, steel-framed crates with end cap protectors, color-coded hard-stamping, and custom barcode labeling for inventory management.

Our Factory

FAQ

Q: How do I specify the correct wall thickness for a butt-weld fitting?

A: Provide the nominal pipe size, required schedule or wall thickness, material grade, applicable dimensional standard, and design conditions. The fitting dimensions and wall-thickness acceptance criteria should be confirmed against the applicable standard and purchase specification.

Q: Which standards apply to industrial pipe fittings?

A: The applicable standard depends on the fitting type. ASME B16.9 is commonly used for factory-made wrought butt-welding fittings, while ASME B16.11 covers forged fittings such as threaded and socket-weld types. Other product and material standards may apply to particular fitting categories. Confirm the governing standard in the project specification before ordering.

Q: Can you provide material traceability and inspection reports?

A: Documentation depends on the order requirements and the supplier's verified capabilities. Buyers should specify the required material certificate type, traceability information, mechanical and chemical test records, dimensional reports, and NDT scope before production. Availability of EN 10204 Type 3.1 or Type 3.2 documentation should be confirmed for the selected order.

Q: Which testing methods are required for pipe fittings?

A: Testing requirements depend on the material, fitting type, manufacturing route, applicable standard, and service conditions. Possible requirements include chemical analysis, mechanical testing, dimensional inspection, PMI, UT, RT, or MT. Not every method applies to every fitting, so the inspection and test plan should be agreed before manufacture.

Q: Can you supply fittings for low-temperature or corrosive service?

A: Material selection must be based on the design temperature, conveyed medium, corrosion conditions, and applicable code. Grades such as ASTM A420 WPL6 or suitable stainless and duplex grades may be considered where their specifications meet the project requirements. Required impact testing, corrosion testing, and other supplementary requirements must be confirmed for the selected grade and application.

Q: What information is needed for a bulk project quotation?

A: Please provide the fitting type, nominal size, wall thickness or schedule, material grade, dimensional standard, quantity, end preparation, applicable testing and documentation requirements, surface treatment, delivery destination, and required delivery schedule. Drawings and a project material specification are helpful for non-standard items.

Request a Technical Quotation

Send your piping specifications or bill of materials for review. Our team can assess the requested product range and confirm applicable manufacturing options, technical requirements, documentation, pricing, and lead time.
Contact: anzhiyuan@yhmadeinprc.com.cn — please verify the correct sales email address before publication.

Information required for quotation:
Product type and applicable standard.
NPS/DN, schedule or wall thickness.
Material grade and service conditions.
Quantity and delivery destination.
Required testing, inspection, and certification documents.
Surface treatment, marking, and packaging requirements.
Drawings or project specifications for non-standard fittings.

We're well-known as one of the most experienced pipe fittings manufacturers in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy discount pipe fittings in stock here from our factory. Contact us for pricelist and free sample.