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WP304 / WP304L / WP304H Stainless Steel Pipe Fittings custom

WP304 / WP304L / WP304H Stainless Steel Pipe Fittings Manufacturers

-- Steady & Reliable Manufacturer --

Material & Manufacturing Process

WP304, WP304L and WP304H are widely used austenitic stainless steel grades known for good corrosion resistance, weldability and mechanical performance. At GX Fitting, these materials are processed through controlled forming, heat treatment, machining and finishing procedures according to applicable standards and project requirements. Our production process includes raw material verification, forming, heat treatment, dimensional inspection and final surface finishing. Chemical composition can be verified by spectrometer analysis, while mechanical testing and NDT can be performed according to customer specifications. For project applications, fittings can be supplied with EN 10204 3.1 material certificates and full material traceability. With manufacturing experience since 1993, GX Fitting supports both standard and customized stainless steel pipe fitting requirements.

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WP304 / WP304L / WP304H Technical Specifications

ParameterSpecification Detail
Material GradeASTM A182 F304/F304L/F304H, ASTM A403 WP304/WP304L/WP304H
Design StandardASME B16.9, ASME B16.11
Size RangeDN15 - DN3800 (1/2" - 150")
Wall ThicknessSCH5S to XXS, heavy-wall on request
DocumentationEN 10204 3.1 Material Certificates, full traceability
CertificationPED, AD2000, DNV, ABS, BV, ISO

Specification Range

GX Fitting manufactures WP304/304L/304H pipe fittings from DN15 to DN3800 (150"), with particular experience in large-diameter and heavy-wall components. Our product range includes elbows, tees, concentric reducers, eccentric reducers, caps, stub ends, crosses and customized fittings. Dimensions and wall thicknesses can be manufactured according to applicable ASME/ASTM standards, customer drawings and project specifications. Large-diameter, heavy-wall and non-standard fittings can be evaluated by our engineering team before production. Depending on project requirements, products can be supplied with material certificates, dimensional inspection reports, chemical and mechanical test results and specified NDT documentation.

Product Advantages

WP304/304L/304H fittings offer a practical combination of corrosion resistance, strength, fabrication performance and cost efficiency for many industrial piping systems.

  • Grade Selection Flexibility: WP304 is widely used for general stainless steel applications, while WP304L is particularly suitable for welded components where low carbon content is required. WP304H is designed for applications involving elevated-temperature service.
  • Specialized Manufacturing Experience: GX Fitting combines these material characteristics with more than 30 years of specialized pressure pipe fitting manufacturing experience.
  • Large-Diameter Manufacturing Capability: Our capabilities include large-diameter fittings up to DN3800, heavy-wall production and customized project solutions.
  • Comprehensive Quality Control: Quality control includes raw material verification, chemical analysis, dimensional inspection, heat treatment and mechanical testing, with UT, RT, PT or MT available according to project requirements.

Applications

WP304/304L/304H pipe fittings are widely used in applications requiring reliable stainless steel performance and general corrosion resistance. Typical industries include chemical processing, petrochemical, food processing, pharmaceutical, water treatment, power generation, oil & gas and general industrial piping. WP304 is commonly selected for general-purpose stainless steel piping, while WP304L is widely used in welded piping systems. WP304H can be considered for higher-temperature applications where the grade is specified by the project. GX Fitting supports EPC contractors, distributors and industrial end users with standard, large-diameter, heavy-wall and customized fittings. Our engineering team can review material grade, dimensions, wall thickness, applicable standards, heat treatment, inspection and documentation requirements to provide a complete project-oriented supply solution.

  • Q: What is the difference between WP304 and WP304L?
  • A: WP304L has a lower carbon content than standard WP304, reducing the risk of sensitization during welding and making it more suitable for welded piping systems.
  • Q: Can WP304H fittings be used for elevated-temperature service?
  • A: Yes, WP304H is designed for applications involving elevated-temperature service where higher mechanical strength at temperature is required compared with standard WP304.
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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As WP304 / WP304L / WP304H Stainless Steel Pipe Fittings Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

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