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Flanged Piping Connections Butt Weld Stub Ends custom

Flanged Piping Connections Butt Weld Stub Ends Manufacturers

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Material & Manufacturing Process

Butt Weld Stub Ends for Flexible & Cost-Efficient Flanged Piping Connections.GX Fitting manufactures butt weld stub ends for piping systems requiring reliable flanged connections, easy maintenance and efficient material utilization. Our stub ends are available in carbon steel, alloy steel, stainless steel, Duplex, Super Duplex, 254SMO, nickel alloys, Hastelloy, titanium and other special materials. Depending on size, material and wall thickness, production may involve hot forming, pressing, forging or customized fabrication, followed by heat treatment, machining and surface finishing. Particular attention is given to flange-facing geometry, welding ends, wall thickness and dimensional accuracy. Material identification, chemical analysis, mechanical testing and NDT inspections can be performed according to project requirements. With pressure piping manufacturing experience since 1993, GX Fitting provides customized stub end solutions for demanding EPC projects.

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Butt Weld Stub Ends Technical Specifications

Parameter Specification Detail
Material Grade Duplex, Super Duplex, 254SMO, Hastelloy
Design Standard ASME B16.9, ASME B16.5
Size Range DN15 to DN3800 (150")
Certification PED, AD2000, DNV, NORSOK M-650, ABS, BV, ISO
Testing / Inspection Ultrasonic (UT), Radiographic (RT), Magnetic Particle (MT), Penetrant (PT)

Specification Range

GX Fitting supplies butt weld stub ends from DN15 to DN3800 (150"), covering standard sizes as well as large-diameter and customized configurations. Products can be manufactured in different lengths, wall thicknesses, radii and end preparations according to piping design requirements. Our range includes short pattern and long pattern stub ends, with configurations suitable for different lap joint flange assemblies. Manufacturing can follow applicable standards including ASME B16.9, ASME B16.5, MSS, ASTM, EN, DIN, JIS, GB/T and customer-specific specifications, depending on the project. Our technical team can review drawings and specifications for non-standard requirements. Complete material traceability, EN 10204 3.1 certificates, dimensional reports and inspection documentation can be provided.

Product Advantages

Butt weld stub ends offer an efficient solution for systems where flange connections require frequent assembly, alignment or maintenance

  • Simplified Installation & Alignment: When used with lap joint flanges, the loose flange can rotate around the stub end, simplifying bolt-hole alignment during installation
  • Rigorous Testing & Inspection: GX Fitting combines precision forming, machining and material expertise to manufacture reliable stub ends for standard and demanding applications
  • Large-Diameter Manufacturing Capability: Our large-diameter capability up to DN3800 and experience with heavy-wall and special alloy components allow us to handle challenging project requirements
  • Comprehensive Quality Control: Quality control covers raw material verification, forming, heat treatment, dimensional inspection and final testing
  • Proven Manufacturing Capability: UT, RT, PT, MT and third-party inspection can be arranged when required
  • International Certification: International certifications include DNV, NORSOK M-650, PED, AD2000, ABS, BV and ISO systems.

Applications

Butt weld stub ends are widely used in piping systems where flexible flange connections and convenient maintenance are important. Typical applications include oil & gas, petrochemical, refinery, chemical processing, offshore, marine engineering, water treatment, food processing and pharmaceutical facilities. They are particularly useful for corrosive services where expensive alloy pipe or fittings are combined with a compatible stub end and a more economical backing flange. GX Fitting supports carbon steel, stainless steel, Duplex, Super Duplex and nickel alloy solutions according to operating conditions. Our team works with EPC contractors, engineering companies, distributors and industrial users to provide material selection, technical clarification, customized manufacturing and inspection support. From small-diameter process lines to DN3800 large-diameter systems, GX Fitting provides project-oriented stub end solutions.

  • Q: What size and pressure range is available for Butt Weld Stub Ends?
  • A: We supply Butt Weld Stub Ends covering sizes from DN15 to DN3800 (150"), manufactured according to project specifications.
  • Q: What materials and standards apply to Butt Weld Stub Ends?
  • A: We manufacture Butt Weld Stub Ends in materials such as Duplex, Super Duplex, 254SMO, Hastelloy and to standards including ASME B16.9, ASME B16.5, with full material traceability available on request.
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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 Flanged Piping Connections Butt Weld Stub Ends 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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