ASTM A671 CA55 Pipe
ASTM A671 CA55 Pipe | Electric-Fusion-Welded Carbon Steel Pipe for Pressure Service | Low-Temperature Performance Solutions
Hebei Longma Group manufactures ASTM A671 CA55 Pipe using electric-fusion-welding technology and pressure vessel quality steel plate. We have over 20 years of manufacturing expertise and the ability to produce over 1,000,000 tons annually in our 230,000 square metre plant. We specialise in the manufacture of large diameter, thick wall welded pipes for demanding industrial applications. This pipe grade has good mechanical capabilities for atmospheric and low temperature service situations. Available in outer diameter from 60.3mm to 2032mm and wall thickness from 4mm to 100mm. Our quality control system guarantees total traceability from raw material selection to final product delivery.
Technical Specifications of ASTM A671 CA55 Pipe
The manufacturing process utilizes pressure vessel quality steel plate combined with controlled welding procedures. Our production parameters meet strict international standards for pressure piping applications.
| Specification | Details |
|---|---|
| Standard | ASTM A671 |
| Grade | CA55 |
| Outer Diameter | 60.3mm - 2032mm (2" - 80") |
| Wall Thickness | 4mm - 100mm |
| Manufacturing Process | Electric-Fusion-Welded (EFW) |
| Base Material | Pressure Vessel Quality Plate |
| Inspection Options | Radiographic Testing (RT), Ultrasonic Testing (UT) |
| Delivery Condition | Heat Treated or As-Welded |
| Length | Cut-to-length as per project requirements |
Performance Advantages for Industrial Applications
The pipe demonstrates exceptional toughness retention in cold climate operations. Low-temperature service requires materials that resist brittle failure, which this grade achieves through controlled steel chemistry and post-weld heat treatment options.
For large-diameter pipeline projects, you gain significant cost advantages compared to seamless alternatives. Heavy-wall specifications become economically feasible without compromising structural integrity or pressure-containing capability.
The electric-fusion-welding process creates consistent weld quality throughout production. Every weld undergoes rigorous non-destructive examination to verify integrity. Our inspection protocols include full radiographic testing or ultrasonic testing based on your project specifications.
Hebei Longma Group strictly meets the criteria of ASTM A671. This accreditation means that your pipe system passes safety criteria for important industrial areas like oil and gas facilities, power generating plants, and chemical processing sites.
Complete Quality Documentation and Traceability
Your procurement process benefits from comprehensive documentation support. We provide Material Test Certificates with heat number traceability, chemical composition analysis, and mechanical test reports showing tensile strength, yield strength, elongation, and impact test results at specified temperatures.
Hydrostatic test records accompany every order. Pressure testing at 1.5 times design pressure confirms zero-leakage performance before shipment. Weld inspection reports include radiographic or ultrasonic examination data according to the specified class requirements.
Dimensional inspection records verify that outer diameter, wall thickness, and length meet your purchase order specifications. Visual inspection documentation confirms surface quality standards.
Third-party inspection coordination is available for ASTM A671 CA55 Pipe through agencies such as Bureau Veritas, TÜV, or Intertek. Positive Material Identification and additional non-destructive testing can be arranged according to your quality plan.
Customization Capabilities for Project Requirements
Flexibility in manufacturing allows us to match your specific needs. Diameter and wall thickness combinations adapt to your pressure calculations and flow requirements. Cut-to-length supply eliminates field cutting operations and reduces installation time.
We have a 230,000 m² facility, huge quantities of manufacturing with the shortest delivery, such as 7 days for standard standards. We provide a stable supply to building programmes underway with an annual capacity of more than 1 million tons.
Base metal qualities are compatible with raw materials received from major Chinese steel mills including HBIS, Baosteel, and Shougang. Upon arrival each steel plate is inspected before entering manufacturing.
Advanced heat treatment equipment allows precise control of post-weld thermal cycles. Stress relief heat treatment improves dimensional stability and enhances weld zone toughness for Class 22 applications.
Value-Added Fabrication and Protection Services
Beyond pipe manufacturing, we offer comprehensive fabrication services. Welding joints, perforating sections, and expansion processing prepare your pipe for direct installation. End treatment options accommodate flanged connections, beveled edges, or threaded configurations.
Anti-corrosion protection increases longevity in tough situations. Hot-dip galvanising offers cathodic protection for subterranean pipes. The fusion bonded epoxy (FBE) layer provides exceptional chemical resistance. Two layer polypropylene (2PP) and three layer polyethylene (3LPE/3PE) coatings provide corrosion protection and mechanical durability.
The finishes are added to your project parameters at the production stage. Get completed pipe ready for installation, minimising on-site prep work and speeding project completion.
Global Supply Experience and Standards Compliance
Our facility's products have made their way to clients in 90+ countries across the globe. Experience in working internationally with engineering contractors, steel distributors, stockists and direct importers across a wide range of sectors.
Manufacturingcapabilities include ASTM A671 and API 5L (grades B through X80), ISO 3183, EN10219, ASTM A53/A500/A252/A672/A691, and AS/NZS 1163 standards. This flexibility enables us to serve numerous pipeline specifications in a single project scope.
Quality management certifications include ISO 9001, ISO 14001, ISO 18001, API 5L and Factory Production Control certificates. These certificates are a testament to our dedication to rigorous quality control and continual development.
FAQ
Q：Why should buyers choose the product for low-temperature and pressure service applications?
A: This pipe grade has outstanding performance at low temperatures and high pressure capabilities. The electric-fusion-welding technology can produce bigger diameters and heavier wall thicknesses than seamless fabrication . This makes the process suited for large scale industrial applications. The strength of pressure vessel grade steel is steady and structurally reliable. Strict quality control throughout the production process guaranties constant weld quality, providing dependable performance in LNG terminals, petrochemical plants, power generation, and key infrastructure projects.
Q：What quality inspections should buyers require when purchasing products?
A：Comprehensive inspection documentation should include Material Test Certificates with heat number traceability, chemical composition analysis, and mechanical test reports covering tensile strength, yield strength, elongation, and impact testing at specified temperatures. Hydrostatic test records verify pressure-containing integrity. Weld inspection reports with radiographic or ultrasonic testing data confirm joint quality. Dimensional inspection validates geometry compliance. Visual inspection records document surface condition. Depending on project criticality, third-party inspection, Positive Material Identification, and additional non-destructive testing provide further verification.
Q：How should buyers select a reliable product supplier?
A：Evaluate manufacturing capability including experience with electric-fusion-welded pipe production and capacity to meet required dimensions. Assess the quality control system covering raw material selection, welding procedures, non-destructive testing capability, and full traceability. Consider project support capabilities such as production capacity, delivery reliability, technical communication quality, and documentation support. A qualified supplier provides more than compliant pipes—they deliver complete supply solutions minimizing project risks and supporting safe execution.
Contact Us
Whether you need standard ASTM A671 CA55 Pipe configurations or specialized requirements for challenging service conditions, we deliver quality products backed by comprehensive documentation. Reach us at info@longma-group.com to request quotations, technical data sheets, or project consultation.
