Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of q355 low alloy erw hfw straight pipe od76-660mm heavy load project in China. Welcome to buy discount q355 low alloy erw hfw straight pipe od76-660mm heavy load project made in China here from our factory. Quality products and low price are available.
Product introduction
Product Overview
Q355 low alloy ERW and HFW straight welded steel pipe is a high-strength heavy-load structural tube specially developed for large-scale, high-load and high-stability engineering projects. Covering an outer diameter range from 76mm to 660mm, this product adopts premium Q355 low alloy structural steel as raw material, featuring higher yield strength, better toughness and stronger compression resistance compared with ordinary carbon steel pipes.
Manufactured by advanced ERW resistance welding and HFW high-frequency induction welding technology, the pipe body features uniform structure, high weld integrity and excellent overall rigidity. It is widely used for heavy-load building frames, large steel structure supports, bridge engineering, heavy machinery bases, port infrastructure and industrial heavy-duty support systems. Available with black uncoated, anti-rust oil and hot-dip galvanized surface treatment, Q355 low alloy welded pipes fully meet long-term heavy pressure, anti-deformation and high safety requirements of key national and international engineering projects.
Production Process
Q355 Low Alloy Raw Material Inspection: Adopt standard Q355 low alloy steel coils with strictly controlled chemical composition and mechanical indicators to ensure high strength, low temperature toughness and stable load-bearing performance.
Precision Slitting: Steel strips are cut to uniform width with precise tolerance to guarantee consistent wall thickness and balanced force bearing of heavy-duty pipes.
Heavy-Duty Cold Forming: Multi-pass heavy rolling forming ensures compact pipe structure, perfect roundness and ultra-high straightness, avoiding structural deformation under heavy load.
ERW / HFW High Strength Welding: Optimized high-load welding parameters deliver deep fusion and high-strength weld seams. HFW welding provides narrower heat-affected zones and uniform weld texture, matching the high mechanical performance of Q355 base metal.
Full Weld Bead Removal: Internal and external welding beads are completely polished to eliminate stress concentration, ensuring uniform force distribution for heavy-load operation.
Precision Sizing & Straightening: Secondary precision calibration ensures ultra-low dimensional tolerance, meeting high-standard installation and structural matching requirements of heavy engineering.
100% NDT & Hydrostatic Test: Every pipe passes eddy current ultrasonic flaw detection and high-pressure hydrostatic test to eliminate internal defects and ensure overall structural safety.
Custom Fixed-Length Cutting: Standard 6m/12m lengths and customized 1.5–18m fixed lengths are available for different heavy-load project designs.
Professional Surface Treatment: Optional anti-rust oil coating or hot-dip galvanized treatment improves outdoor weather resistance and long-term structural durability.
Strict Batch Sampling Test: Conduct tensile, compression, bending, impact and hardness tests to verify heavy-load performance, ensuring full compliance with project structural design standards.
Technical Specifications
Basic Parameters
Product Name: Q355 Low Alloy ERW HFW Straight Welded Steel Pipe Material Grade: Q355 Low Alloy Structural Steel Welding Process: ERW Electric Resistance Welding / HFW High Frequency Welding Core Application: Heavy-load structural engineering, large steel frame, bridge and infrastructure projects Surface Treatment: Black uncoated, anti-rust oil, hot-dip galvanized Executive Standards: GB/T, ISO, ASTM, EN standard for low alloy structural steel tubes
Dimension Range
Outer Diameter: 76mm – 660mm Wall Thickness: 2.0mm – 25.4mm, thick-wall customization for super heavy-load projects Length: Standard 6m/12m; customized fixed length 1.5m–18m
Product Advantages
High-Strength Heavy-Load Capacity: Q355 low alloy material provides 30% higher yield strength than ordinary Q235 steel, perfectly suitable for super heavy-load support and large-span structural engineering.
Excellent Structural Stability: Uniform pipe body and high-integrity HFW/ERW welds ensure overall force balance, effectively resisting pressure, vibration and impact in complex working conditions.
Superior Low-Temperature Performance: Good low-temperature toughness prevents brittle fracture in cold regions, suitable for high-latitude and outdoor open-air heavy engineering.
Strong Deformation Resistance: High rigidity and tensile strength ensure no bending or sinking under long-term heavy load, greatly improving project safety factor.
Full-Size Coverage: Complete OD 76–660mm specifications meet all sizes of main and secondary heavy-load structural pipes for large projects.
Custom Engineering Solution: Support thick-wall, super-long, special tolerance and customized pipe end processing to adapt to personalized heavy-duty project requirements.
Long Service Life: Stable physical and chemical properties, strong atmospheric corrosion resistance, reducing later maintenance cost of key projects.
Application Fields
Large-scale high-rise building heavy steel frame structures
Bridge, viaduct and large-span municipal infrastructure support projects
Port, dock and terminal heavy-load bearing structural engineering
Heavy industry factory frame, workshop steel structure and equipment base support
Large venue, stadium and exhibition center steel truss structures
Mining heavy support structures and large mechanical equipment supporting tubes
National key infrastructure and large EPC heavy-load engineering projects
Packaging & Delivery
Q355 low alloy heavy-load steel pipes are bundled with high-strength steel strips. Standard plastic end caps are installed to protect pipe ends. Custom anti-rust oil and waterproof packaging are available for long-distance sea transportation. Support FCL container loading and bulk vessel shipment for large project orders. Custom shipping marks, bundle weight and export packaging can be provided according to client engineering standards.
Quality Assurance & Service
All Q355 heavy-load pipes are produced under strict ISO quality control system. Complete Mill Test Certificates, mechanical property test reports, NDT inspection records and batch quality certificates are provided. Third-party inspection such as SGS, BV is acceptable. We support long-term framework contracts and large-batch project orders, providing one-stop services including technical confirmation, production tracking, inspection arrangement and full export document support.
About us
Hebei Huayang Steel Pipe Co., Ltd. was founded in 2005, with a registered capital of 500 million yuan. The company covers an area of more than 1,000 mu, with annual sales of 10 billion yuan, more than 600 employees and an annual productivity of 2.75 million tons. The company has 17 new automatic steel pipe production lines and 14 high-frequency production lines, with a diameter of 73-660 mm; Three double-sided submerged arc welded steel pipe production lines with diameters of 406.4-1422.4mm;; 24 hot tube expanding production lines, with a diameter of 230-820mm; Two anticorrosion steel pipe production lines with a diameter of 73-1626 mm; 2 automatic painting production lines. With 3 branches and 5 offices, the products are sold to various cities and exported to more than 80 countries such as Southeast Asia, Middle East, Europe and America.
Packaging, transportation and delivery
Packaging, transportation and delivery
At Hebei Huayang Steel Pipe Co., Ltd., we apply standardized and reliable packaging solutions for all our steel pipe products. Our pipes can be securely packed by hexagonal bundling or circular bundling according to product diameter, wall thickness and customer requirements. Each pipe end is protected with high‑strength plastic pipe caps to avoid collision damage, dust and moisture during transportation and storage. The whole bundle is firmly wrapped with durable woven bags to enhance stability and prevent scratches or deformation.
We support a complete range of transportation methods to satisfy global customers, including road transportation, railway transportation, sea freight and container shipping. Based on our strategic location in Cangzhou, Hebei Province, we enjoy convenient access to major ports such as Tianjin Port, which greatly improves logistics efficiency and reduces transportation costs.
For standard specifications and normal order quantities, the general delivery time is about 30 days after order confirmation and deposit receipt. For large‑scale orders, special sizes or customized processing requirements, our production and sales team will formulate a detailed production plan and provide an accurate delivery schedule accordingly to ensure on‑time supply and stable performance for projects and clients worldwide.
Strict quality control
1. During and after the production, experienced quality inspectors randomly check the products to ensure that each steel pipe is qualified for production and application.
2. A nationally recognized laboratory with CNAS certification and certification by French Classification Society.
3. Have CNOOC access certificate, KOC oil company access network, ADNOC Abu Dhabi oil company access network, Petrobras access network, etc.
4. Accept the inspection by the third party designated/paid by the buyer, such as SGS and BV.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
Hot Tags: q355 low alloy erw hfw straight pipe od76-660mm heavy load project, China q355 low alloy erw hfw straight pipe od76-660mm heavy load project manufacturers, suppliers, factory, 610 Straight Seam Steel Pipe Petroleum Pipeline Steel, Api 5l X52, EN10217 ERW CARBON ROUND STEEL PIPE, ERW Steel Pipe, Erw Tube Suppliers, Q390C ERW STEEL PIPE
