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WPL6 Low Temperature Carbon Steel Butt Weld Pipe Caps custom

WPL6 Low Temperature Carbon Steel Butt Weld Pipe Caps Manufacturers

-- Steady & Reliable Manufacturer --

Low-Temperature Terminal Solutions

In cold-climate regions and cryogenic processing, standard carbon steel can become brittle and prone to fracture. Our WPL6 Low Temperature Carbon Steel (LTCS) Butt Weld Pipe Caps are specifically engineered to maintain their ductility and impact toughness at temperatures as low as -45°C (-50°F). Manufactured from aluminum-killed steel with a fine grain structure, these caps undergo normalized heat treatment to ensure safety in sub-zero operational environments. As a professional manufacturer, we ensure that every cap provides a perfect, leak-proof seal for the ends of your piping system. Whether used for permanent closure or as a placeholder for future expansion, our WPL6 caps meet the strict Charpy V-notch impact testing requirements, making them the standard choice for the oil, gas, and petrochemical industries operating in northern latitudes or cryogenic process loops.

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LTCS Specification Table

ParameterWPL6 Specification Detail
Material GradeASTM A420 WPL6
Impact Test Temp-45°C (-50°F) per ASTM A420
Manufacturing StandardASME B16.9, MSS SP-75
Size Range1/2" to 48" (DN15 - DN1200)
Wall ThicknessSch 40, Sch 80, Sch 160, Sch XXS
Surface TreatmentBlack Painting, Zinc-Rich Primer, Cold Galvanized

Cryogenic & Cold Climate Applications

WPL6 pipe caps are the primary choice for midstream oil and gas pipelines in arctic or sub-arctic environments where ambient temperatures drop significantly. They are widely used in LNG (Liquefied Natural Gas) terminals and ethylene plants for low-temperature process piping. In the energy sector, these caps are utilized in offshore platforms in the North Sea and other cold-water regions. They are also essential for compressed gas storage facilities and CO2 transport systems. Beyond energy, they are used in industrial refrigeration systems and cold-storage infrastructure. The robust impact resistance of WPL6 makes these caps suitable for any application where thermal shock or rapid decompression cooling is a risk, ensuring that the piping terminal remains secure even under extreme thermal stress.

Material & Safety Advantages

  • Superior Impact Toughness: Guaranteed Charpy V-notch performance at low temperatures ensures the fitting will not undergo brittle fracture.
  • Enhanced Ductility: Specialized heat treatment (Normalizing) refines the grain structure, providing excellent weldability and toughness.
  • Reliable Sealing: Seamless construction ensures there are no weld seams that could act as stress concentrators in cold service.
  • Full Compliance: Manufactured and tested to meet ASTM A420 standards, the benchmark for low-temperature piping components.

Trade & Export Logistics

We support payments via T/T and Irrevocable L/C. For large pipeline projects, we provide staggered deliveries to match the site construction phases. Each WPL6 cap is coated with a low-temperature resistant black primer or anti-rust oil and packed in seaworthy wooden cases with moisture-proof linings. We provide a full 3.1 Mill Test Certificate for every batch, including the specific Charpy V-notch impact test values as required by ASTM A420. Our logistics team handles shipping to major energy hubs worldwide, ensuring all export documentation is prepared for rapid customs clearance. We maintain a significant inventory of standard sizes for immediate dispatch to support winter maintenance and emergency repair needs in cold-climate regions.

  • Q: Why is WPL6 used instead of standard WPB for low temperatures?
  • A: Standard WPB carbon steel becomes brittle and loses its impact resistance as temperatures drop. WPL6 is specifically alloyed and heat-treated to remain tough and ductile at -45°C.
  • Q: Do these caps require post-weld heat treatment (PWHT)?
  • A: While WPL6 itself is normalized, the need for PWHT depends on the thickness and the specific welding code (e.g., ASME B31.3) of the overall piping system.
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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 WPL6 Low Temperature Carbon Steel Butt Weld Pipe Caps 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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