• TOBO STEEL GROUP CHINA
    Brazil---Aimee
    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
  • TOBO STEEL GROUP CHINA
    Thailand ---Dave Mulroy
    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
  • TOBO STEEL GROUP CHINA
    USA ---Alfaro
    ASTM A182 F55 Super Duplex Flange ,Good quality , we like that ! And delivery time in time also ,very professional.
Contact Person : Joy Wang
Phone Number : 0086-21-31261985
WhatsApp : +8613524668060

Butt-welding Pipe Fittings Short Type Stub End Stainless Steel ASTM A403 WP304 ASME B16.9

Place of Origin Shanghai,China
Brand Name TOBO
Certification ISO/TUV/SGS
Model Number Butt Welding Fitting
Minimum Order Quantity 1PC
Price Negotiable
Packaging Details Standard Shipping Package
Delivery Time 15-30 Workdays
Payment Terms T/T,Western Union
Supply Ability 10Ton/Month
Product Details
Connection Flange Usage Oil Gas Water Industrial
Head Code Round Stander ANSI B16.9
Packing Wooden Case Corrosion Resistance High
Tolerances ASME B16.9 Productname Butt Weld Fittings
Manufacturingprocess Forging, Casting, Machining Thickness STD
Tolerance ±1% Surface Finish Polished
Degree 90D,45D,180D Or As Request Temperature Rating Up To 1200°F
Material Grade Copper Nickel 70/30
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stainless steel stub end fittings

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ASTM A403 WP304 pipe fittings

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ASME B16.9 short type stub end

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Product Description

Butt-welding Pipe Fittings Short Type Stub End Stainless Steel  ASTM A403 WP304 ASME B16.9  

1. Product Description

This product is a stainless steel short-type butt-welding stub end, manufactured in strict compliance with ASTM A403 and ASME B16.9 standards, and generally meets MSS SP-43 requirements as well. It is a forged or wrought butt-welding fitting designed to be used with a Lap Joint Flange, forming a detachable lap joint connection. The material is ASTM A403 WP304 stainless steel, offering excellent corrosion resistance and mechanical properties.

2. Key Product Parameters



Parameter Details / Range
Design Standard ASTM A403, ASME B16.9, MSS SP-43
Material Grade WP304 (UNS S30400), equivalent to AISI 304
Size Range 1/2" – 24" (DN15 – DN600)
Schedule / Thickness Sch 10S, Sch 40S, Sch 80S, SCH160, XXS, etc.
Type Short Type
Critical Dimensions (Short Type) Length F: 51mm – 152mm (varies by size); Radius R: per standard
Surface Finish Pickled, sandblasted, or polished as required
Pressure Ratings Class 150, 300, 600, 900, 1500, 2500 PSI

3. Application / Usage

  • Extensively used in petrochemical, chemical, natural gas, power generation, and other industrial pipeline systems.

  • Ideal for pipelines that require frequent maintenance, cleaning, or periodic inspection.

  • Commonly applied to connect metallic pipes to non-metallic or dissimilar metal pipes.

4. Advantages

  • Cost-Effective: Only the stub end needs to be made of stainless steel; the companion lap joint flange can be manufactured from carbon steel, significantly reducing overall system costs.

  • Easy Installation & Maintenance: The lap joint flange can rotate freely, making bolt-hole alignment simple without rotating heavy pipes. Disassembly does not require cutting the pipe.

  • Superior Corrosion Resistance: WP304 stainless steel ensures outstanding durability and longevity in corrosive environments.

5. Functions

Provides a reliable, leak-tight detachable connection point within the piping system. When the plain end is butt-welded to the pipe, the lapped (flanged) face forms a seal with the lap joint flange and a gasket, ensuring pressure integrity and preventing leakage.

6. Installation Instructions

  1. Cleaning: Remove all dirt, grease, oil, or debris from the weld areas of both the pipe end and the stub end.

  2. Alignment: Accurately align the plain (non-flanged) end of the stub end with the pipe end.

  3. Welding: Perform butt-welding following the approved Welding Procedure Specification (WPS), using certified and qualified welders.

  4. Assembly: Slide the lap joint flange over the stub end, place a suitable gasket between the lapped faces, and tighten the bolts evenly in a cross-torque sequence.

7. Precautions

  • Rating Verification: Always verify that the size, schedule, and pressure rating (Class) match the system design requirements before installation.

  • Proper Welding: Welding must be carried out by qualified personnel in strict compliance with standard welding procedures.

  • Avoid Overloading: Do not exceed the recommended torque during bolt tightening to avoid gasket extrusion or damage to the lapped face.

8. Shipping & Delivery

  • Standard delivery time is typically 15–30 days, subject to order quantity, specific sizes, and material availability.

9. Payment Terms

  • We accept common international payment methods, including T/T (Telegraphic Transfer) and L/C at sight (Letter of Credit) . Other terms can be negotiated.

10. Packaging

  • Packaging Method: Products are securely packed in non-fumigation plywood cases or wooden crates, with proper internal cushioning to ensure safe transportation and prevent damage during transit.

11. After-Sales / Return & Warranty Policy

  • All products undergo 100% strict quality inspection before shipment.

  • In case of any quality issues, please retain the original packaging and provide relevant photos or third-party inspection reports for prompt assistance.

  • Specific return, exchange, and warranty terms will be subject to the final sales contract agreement.

Butt-welding Pipe Fittings Short Type Stub End Stainless Steel  ASTM A403 WP304 ASME B16.9Butt-welding Pipe Fittings Short Type Stub End Stainless Steel  ASTM A403 WP304 ASME B16.9

FAQ

1. Are you trading company or manufacturer ?
    We are manufacturer ,You can see the certification.
2. How long is your delivery time?
    Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
    Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
    Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.