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

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

1. Product Description

This product is a stainless steel long-type butt-welding stub end, manufactured in strict accordance with ASTM A403 and ASME B16.9 standards. It is a critical connecting component in piping systems, designed to be used with a Lap Joint Flange to form a detachable lap joint connection, which is ideal for systems requiring frequent disassembly.

2. Key Product Parameters

3. Application / Usage

• Widely used in petrochemical, chemical, power generation, and metallurgical pipeline systems.

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

• Suitable for connecting metallic pipes to non-metallic or dissimilar metal pipes.

4. Advantages

• Cost-Effective: Only the stub end needs to be made of alloy materials; the companion flange can be carbon steel, significantly reducing overall costs.

• Easy Installation: The lap joint flange can rotate freely, simplifying bolt-hole alignment without rotating heavy pipes.

• Superior Corrosion Resistance: Stainless steel construction ensures excellent durability in aggressive environments.

5. Functions

Provides a reliable, leak-tight detachable connection point. When welded to the pipe end, the stub end's lapped surface forms a seal with the lap joint flange, ensuring pressure integrity and preventing leakage.

6. Instruction / Installation Guide

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

2. Alignment: Accurately align the plain end of the stub end with the pipe end.

3. Welding: Perform butt-welding following the approved Welding Procedure Specification (WPS) with certified welders.

4. Assembly: Slide the lap joint flange over the stub end, place a gasket between the lapped faces, and tighten the bolts evenly.

7. Precautions

• Rating Verification: Always verify that the size and pressure rating match the system requirements before installation.

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

• Avoid Overloading: Do not exceed the recommended torque during bolt tightening to prevent gasket or flange face damage.

8. Shipping & Delivery

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

9. Payment Terms

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

10. Packaging

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

11. After-Sales / Return & Warranty Policy

• All products undergo strict quality inspection before shipment.

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

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

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.