Name: China Q235B Fluid Transport Pipeline Manufacturers Suppliers Factory - Huayang Steel Pipe
Brand: Huayang
SKU: 305316227

Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of q235b fluid transport pipeline in China. Welcome to buy discount q235b fluid transport pipeline made in China here from our factory. Quality products and low price are available.

Product introduction

Product Description

Q235B Fluid Transport Pipeline is a mainstream high-frequency ERW straight seam welded steel pipe specially developed for civil and industrial low-to-medium pressure fluid transmission projects. Made of premium Q235B carbon steel with stable chemical composition and excellent ductility, this pipeline features uniform wall thickness, smooth inner and outer surfaces, firm weld structure and reliable overall stability. It is the most cost-effective general-purpose fluid steel pipe widely recognized in global pipeline engineering.

All Q235B fluid transport pipelines are manufactured in strict accordance with GB/T 3091, ASTM A53 and international fluid pipeline standards. Each finished pipe undergoes 100% hydrostatic pressure testing, weld non-destructive flaw detection and dimensional calibration to ensure zero leakage and stable pressure resistance. Available in complete specifications and multiple anti-corrosion treatments, it is widely applicable for water supply, gas transmission, sewage drainage and general industrial fluid delivery systems, suitable for buried, overhead and indoor laying environments.

1. Basic Product Specifications

Product Name: Q235B Fluid Transport Pipeline
Steel Grade: Q235B Carbon Steel (Standard fluid pipeline grade)
Executive Standards: GB/T 3091-2015, ASTM A53 Gr.B, EN 10217, ISO 65
Production Process: High-frequency Electric Resistance Welding (ERW), straight seam integral forming, weld stress relief treatment
Size Range: Outer diameter 21.3mm–610mm, full conventional and custom sizes available
Wall Thickness: 1.5mm–20mm, SCH40/SCH80/STD customizable
Standard Length: 6m, 9m, 12m; custom fixed length support
Applicable Media: Tap water, domestic gas, industrial circulating water, rainwater, sewage, non-corrosive low-pressure fluid
Working Pressure: ≤1.6MPa, suitable for all low and medium-pressure fluid transmission systems
Pipe End Treatment: Plain ends / beveled welding ends, plastic anti-collision end caps
Surface Treatment: Black anti-rust oil, hot dip galvanized, 2PE/3PE external anti-corrosion, internal epoxy coating optional
Core Features: Stable material performance, high airtightness, full size coverage, easy installation, ultra-high cost performance, universal for fluid transportation

2. Core Product Advantages

2.1 Stable Q235B Material Performance

Q235B is a mature general-purpose carbon steel grade with balanced toughness, plasticity and structural strength. It has excellent cold bending, welding and processing performance, no brittle fracture under conventional construction and service conditions, and can adapt to most municipal and industrial fluid pipeline operating environments, with stable long-term service performance.

2.2 Excellent Weld Quality & Zero Fluid Leakage

Adopting advanced high-frequency ERW automatic welding technology, the weld and pipe body form an integrated metallurgical structure without cracks, slag inclusions or tiny gaps. Full-length hydrostatic pressure test and ultrasonic weld inspection effectively eliminate fluid leakage risks, ensuring safe and stable transmission of water, gas and other media.

2.3 Smooth Inner Wall & Low Transmission Resistance

The pipe inner wall is smooth and burr-free after precision deburring treatment, which greatly reduces fluid friction resistance, avoids sediment accumulation and pipeline blockage, maintains stable flow and pressure during long-term operation, and effectively reduces energy consumption of fluid transmission equipment.

2.4 Full Size Compatibility & Easy Construction

Complete size coverage from small to large caliber, fully matching standard elbows, tees, flanges, valves and all supporting pipe fittings on the market. The pipe body is easy to cut, weld and install, adapting to various laying methods such as buried, overhead and pipe gallery installation, greatly improving project construction efficiency.

2.5 Ultra-High Cost Performance for Engineering Projects

Compared with alloy steel pipes and seamless pipes, Q235B ERW fluid pipelines have lower procurement cost while fully meeting low and medium-pressure fluid transmission standards. With low failure rate and almost no daily maintenance cost, it is the preferred bulk pipeline material for municipal renovation, industrial supporting and civil engineering projects.

3. Dimensional Tolerance Standard

Inspection Item	Standard Tolerance
Outer Diameter	±0.75% (OD ≤168.3mm); ±1.0% (OD >168.3mm)
Wall Thickness	+12% / −10%
Straightness	≤1.5mm per meter
Out-of-Roundness	≤1.0% of outer diameter
Pipe Length	+100mm / −0mm

4. Mechanical & Chemical Properties

4.1 Mechanical Properties

Steel Grade	Min. Yield Strength	Tensile Strength	Min. Elongation	Hydrostatic Test
Q235B	≥235MPa	375–500MPa	≥26%	100% full-length tested

4.2 Chemical Composition (Max)

C	Si	Mn	P	S
0.22%	0.35%	1.40%	0.030%	0.030%

Note: All pipes pass flattening test, cold bending test and weld tightness test to meet fluid transmission engineering standards.

5. Manufacturing Process

Raw Material Inspection: Select qualified Q235B hot-rolled steel strips, strictly test chemical composition and mechanical properties to ensure compliance with fluid pipeline standards.
Precision Continuous Forming: Multi-roll gradual rolling forming to ensure uniform roundness and consistent wall thickness of the pipe blank.
High-Frequency ERW Welding: Automatic closed-loop welding parameter control to realize integrated forming of weld and pipe body.
Internal & External Burr Removal: Thoroughly remove welding burrs to ensure smooth inner wall and reduce fluid transmission resistance.
Weld Stress Relief: Online heat treatment eliminates welding residual stress, improving pipe toughness and preventing weld cracking.
Sizing & Straightening: Precision sizing and straightening to guarantee accurate dimensional tolerance and pipe linearity.
Fixed-Length Cutting: Custom fixed-length cutting with neat, burr-free pipe ends.
Full Quality Inspection: 100% hydrostatic pressure test, weld ultrasonic flaw detection and full dimensional re-inspection.
Surface Treatment & Marking: Anti-rust oil coating or customized anti-corrosion treatment, permanent laser marking of product information.
Export Standard Packaging: PE film wrapping, steel strip bundling, plastic end caps for safe long-distance transportation.

6. Main Application Scope

Municipal engineering: Urban water supply and gas transmission branch pipeline networks
Construction engineering: Building domestic water, fire protection water and ventilation supporting pipelines
Industrial engineering: Factory circulating water, process water and low-pressure gas transmission pipelines
Water conservancy projects: Rural water reform, irrigation and water delivery supporting pipelines
Environmental protection projects: Urban sewage and rainwater drainage pipeline systems
General infrastructure: Low-pressure fluid transmission pipelines for various civil and industrial projects

7. Quality Inspection & Certification

Compliant with GB/T 3091, ASTM A53, EN 10217 international fluid pipeline standards
100% full-length hydrostatic pressure test and weld non-destructive inspection
Qualified bending, flattening and impact resistance tests
Complete factory MTR test reports and official qualification certificates
Support SGS/BV/TUV third-party sampling inspection and project acceptance
ISO 9001 quality management system certified production

8. Packaging & Delivery

Packaging: Anti-rust oil treatment, waterproof PE film wrapping, high-strength steel strip bundling, plastic anti-collision end caps for pipe ends.
Product Marking: Laser marking including steel grade, standard, specification, batch number and production date.
Trade Terms: FOB, CIF, CFR, DAP global delivery support
Shipping Ports: Tianjin, Qingdao, Shanghai, Ningbo
Customization: Custom fixed length, hot dip galvanized, 2PE/3PE anti-corrosion, special pipe end processing
Delivery Cycle: Conventional stock specifications 3–7 working days, customized products 7–15 working days

9. Why Choose Our Q235B Fluid Transport Pipeline

Standard Q235B Raw Material: Pure national standard steel source, stable material performance, no fake or inferior raw materials
Reliable Fluid-Grade Quality: Strict airtightness and pressure resistance testing, zero leakage for long-term fluid delivery
Full Specification Coverage: Complete sizes to meet all low and medium-pressure fluid project needs
Fine Processing Technology: Smooth pipe wall, accurate size, convenient and efficient construction
High Cost Performance: Factory direct sales, low engineering comprehensive cost, suitable for bulk procurement
Strict Quality Control: Full-process inspection to ensure 100% qualified delivery

About us

Company gate (overlooking view)

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

Steel pipe packaging and loading scene

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.