Carbon Steel A234 WPB Butt Weld Caps are essential pipe fittings designed to seal the ends of piping systems securely and effectively. Manufactured from ASTM A234 WPB (the most commonly used carbon steel grade for high-temperature service), these caps provide a robust, leak-proof, and permanent closure for pipes. Shanxi Xinshunda Flange Manufacturing Co., Ltd. specializes in producing high-quality butt weld caps that meet or exceed international standards such as ASME B16.9 and ASME B16.28. Utilizing premium carbon steel and advanced forming technologies, our caps ensure exceptional dimensional accuracy, superior mechanical strength, and outstanding welding performance. They are engineered to withstand demanding operational conditions, making them a reliable choice for critical industrial applications. Full material traceability and comprehensive Mill Test Reports are guaranteed with every shipment.
Production Details
Our ASTM A193 bolts are produced using state-of-the-art CNC machinery to ensure every thread and hexagonal head meets precise engineering drawings. The raw materials undergo strict chemical composition analysis before entering the production line. Each fastener is subjected to rigorous surface inspection to ensure the absence of defects such as cracks, laps, or improper coating. The dimensional accuracy is verified using advanced measuring instruments, ensuring a perfect match with your mating flanges.
Product Properties and Application
Product Properties
Superior Mechanical Strength: Made from ASTM A234 WPB carbon steel, offering excellent tensile and yield strength to withstand high pressure and extreme temperatures.
Optimal Sealing Performance: Engineered to provide a permanent, leak-proof seal that fully protects the pipeline from external contaminants and corrosion.
Excellent Weldability: The precisely machined beveled edges allow for full-penetration butt welding, creating a monolithic joint as strong as the pipe itself.
High Durability: Features outstanding resistance to impact, vibration, and mechanical stress, ensuring a long service life even in harsh industrial environments.
Application
Carbon Steel A234 WPB Butt Weld Caps are extensively used to terminate piping systems in various heavy-duty industries. Key applications include Oil & Gas Transmission Pipelines, Petrochemical Refineries, Chemical Processing Plants, and Power Generation Facilities (both thermal and nuclear). They are also widely utilized in Water Treatment Plants, Marine and Shipbuilding, and HVAC Systems to securely seal pipe ends during maintenance or at the termination of a pipeline run.
|
Parameter |
Specification |
|
Standard |
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, DIN 2617, JIS B2312 |
|
Product Type |
Butt Weld Cap (End Cap / Pipe Cap) |
|
Material |
Carbon Steel (ASTM A234 WPB, A420 WPL6, API 5L X52/X60/X65) |
|
Size Range |
1/2" to 48" (DN15 to DN1200) |
|
Wall Thickness |
SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS |
|
End Connection |
Beveled End (BW) prepared for butt welding |
|
Manufacturing Method |
Seamless / Longitudinal Welded (ERW) |
|
Surface Finish |
Black Paint, Rust-Proof Oil, Hot-Dip Galvanized (HDG), or Pickled & Oiled |
|
Packing |
Plywood Cases, Wooden Pallets, or Custom Export Packaging |
Physical Properties
|
Property |
Value (Carbon Steel A234 WPB) |
|
Tensile Strength |
≥ 415 MPa (60,000 psi) |
|
Yield Strength |
≥ 240 MPa (35,000 psi) |
|
Elongation |
≥ 22% |
|
Hardness |
≤ 197 HB (Brinell) |
|
Impact Toughness |
≥ 27 J (at room temperature) |
QA & QC
At Shanxi Xinshunda, we implement a rigorous Quality Control system for our Carbon Steel A234 WPB Butt Weld Caps. Every cap undergoes strict dimensional inspections using calibrated templates and ultrasonic thickness gauges to ensure compliance with ASME and other international standards. We perform Hydrostatic or Pneumatic pressure tests to verify structural integrity and leak tightness. Surface defects are thoroughly checked via Magnetic Particle Inspection (MPI) or Dye Penetrant Testing (DPT). Material composition is verified through spectroscopic analysis (PMI), and Mill Test Certificates (EN 10204 3.1) are provided with every shipment.
Packing, Storage, Handling and Transportation
To protect the product during transit, each butt weld cap is carefully cleaned and the beveled end is coated with rust-preventative oil. Smaller caps are individually wrapped in plastic bags or bubble wrap, while larger sizes are stacked and securely fixed on strong plywood pallets. For international shipping, products are packed in sturdy plywood cases with ample cushioning to prevent movement and surface damage. Each package is clearly labeled with the size, material, wall thickness, quantity, and batch number. Store in a dry, well-ventilated area to prevent corrosion.
Strategic Partners with Shanxi Xinshunda
With over 15 years of manufacturing expertise, Shanxi Xinshunda Flange Manufacturing Co., Ltd. has proudly supplied premium industrial piping components to 3,800+ global customers across 70+ countries. We are committed to delivering robust and reliable solutions that ensure the safety and efficiency of your infrastructure projects worldwide, making us your trusted partner in the global energy and processing industries.
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