Name: China ASTM A53 GR.B ERW Steel Pipe DN300 For Low Pressure Fluid Manufacturers Suppliers Factory - Huayang Steel Pipe
Brand: Huayang
SKU: 302818629

Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of astm a53 gr.b erw steel pipe dn300 for low pressure fluid in China. Welcome to buy discount astm a53 gr.b erw steel pipe dn300 for low pressure fluid made in China here from our factory. Quality products and low price are available.

Product introduction

Product Description

ASTM A53 GR.B ERW Steel Pipe DN300 is high‑quality electric resistance welded steel pipe manufactured strictly to ASTM A53 Grade B standard, specially designed for low‑pressure fluid transmission, municipal water supply, fire‑fighting pipelines, general industrial water circulation, irrigation and non‑corrosive medium delivery projects. Adopting premium Grade B carbon steel strips and high‑frequency ERW welding technology, this DN300 (outer diameter 323.9 mm) pipe features stable mechanical performance, reliable weld integrity, good pressure resistance and excellent economy. Widely used in above‑ground and buried low‑pressure fluid pipeline systems worldwide, it provides safe, standard‑compliant and cost‑effective pipeline solutions for general engineering and municipal infrastructure projects.

Basic Product Specifications

Product Name: ASTM A53 GR.B ERW Steel Pipe DN300 For Low Pressure Fluid

Executive Standard: ASTM A53 Grade B, ERW type, compatible with API 5L Gr.B, GB/T 3091

Manufacturing Process: ERW (Electric Resistance Welding), strip cold forming, high‑frequency welding, weld annealing, bead trimming, hydrostatic test

Steel Grade: ASTM A53 Grade B

Nominal Diameter (DN): 300 mm

Outer Diameter (OD): 323.9 mm

Wall Thickness (WT): 6 mm – 12 mm, custom thick‑wall up to 14 mm for higher low‑pressure service

Standard Length: 6 m, 12 m, custom fixed lengths available

Delivery Condition: As‑welded / normalized, stress‑relieved optional

Surface Finish: Black bare steel with anti‑rust oil; hot‑dip galvanized, 3PE anti‑corrosion coating for buried use

Pipe End: Plain ends for flange connection; 30°‑45° beveled ends for field welding

Application: Low‑pressure water supply, fire‑fighting pipelines, industrial circulating water, irrigation pipelines, sewage drainage, general fluid transmission pipelines

Grade & Process Explanation

ASTM A53 Grade B Performance: Grade B is the most widely used carbon steel grade under ASTM A53 standard, with minimum yield strength ≥241 MPa and tensile strength 415–544 MPa. It has stable chemical composition, good weldability and moderate corrosion resistance, perfectly matching low‑pressure fluid transmission requirements such as water and fire‑fighting water.

ERW Process Advantages: High‑frequency continuous ERW welding forms dense full‑length welds without filler metal. Post‑weld annealing eliminates residual stress, ensuring weld mechanical properties match base metal. Smooth inner wall reduces fluid resistance and scaling, ideal for long‑term low‑pressure service. High production efficiency makes it highly cost‑effective for large‑volume low‑pressure pipeline projects.

Low‑Pressure‑Oriented Design: DN300 (323.9 mm OD) is a mainstream medium‑caliber specification for low‑pressure fluid pipelines. Strict dimensional tolerance ensures stable connection with flanges, valves and fittings. Optional anti‑corrosion coatings adapt to underground soil and humid environments, extending service life over 25 years.

Dimensional Tolerance (ASTM A53 Standard)

Item	Tolerance (DN300, OD 323.9 mm)
Outer Diameter	±1.0% of nominal OD
Wall Thickness	+12% / −10% of nominal WT
Out‑of‑Roundness	≤1.0% of outer diameter
Straightness	≤2.0 mm per meter
Length	+200 mm / −0 mm

Mechanical Properties (ASTM A53 Grade B)

Property	Standard Requirement
Minimum Yield Strength	≥241 MPa
Tensile Strength	415 – 544 MPa
Elongation	≥20%
Hydrostatic Test	100% tested at 1.5× working pressure, no leakage
Flattening / Bend Test	No cracks or weld separation

Note: Charpy impact test is optional for cold‑region low‑pressure pipeline projects.

Chemical Composition (Max. %, ASTM A53 Grade B)

Element	C	Mn	P	S	Si
Grade B	≤0.30	≤1.20	≤0.045	≤0.045	≤0.10

Residual elements: Cu ≤0.30%, Ni ≤0.30%, Cr ≤0.30%. Strict impurity control prevents rust and scaling in low‑pressure water and general fluid service.

Manufacturing Process

Raw Material Inspection: Strict chemical and mechanical test for ASTM A53 Gr.B steel strips.

Strip Cold Forming: Precision forming to ensure uniform wall thickness and high roundness.

High‑Frequency ERW Welding: Continuous full‑penetration welding + online bead trimming.

Weld Annealing: Eliminate residual stress and improve weld toughness.

100% UT Inspection: Ultrasonic testing for internal weld defects.

Hydrostatic Pressure Test: Full‑line pressure testing per ASTM A53 standard.

Anti‑Corrosion Treatment: Hot‑dip galvanizing or 3PE coating optional for buried pipelines.

Finishing: End processing, anti‑rust oil coating, standard marking.

Product Advantages

ASTM A53 Gr.B Standard Compliance: Globally recognized standard for low‑pressure fluid pipes, widely accepted in municipal and general industrial projects.

Excellent Low‑Pressure Bearing Performance: Suitable for working pressure ≤1.6 MPa water and fluid transmission.

Stable ERW Weld Quality: Dense weld seam, low defect rate, long‑term reliable service.

DN300 Mainstream Specification: Perfect for urban water supply, fire‑fighting and irrigation trunk lines.

High Cost‑Effectiveness: ERW production efficiency high, suitable for large‑scale low‑pressure pipeline construction.

Complete Quality Traceability: MTR test reports, third‑party inspection (SGS/BV) available.

Main Applications

Municipal low‑pressure water supply and fire‑fighting pipelines

Industrial circulating water and general process fluid pipelines

Farmland irrigation and water conservancy delivery pipelines

Underground buried low‑pressure drainage pipelines

Residential district water supply main pipelines

General non‑corrosive medium transmission engineering

Quality Inspection & Certification

Full dimensional inspection of OD, wall thickness, length, straightness and roundness

Tensile, flattening, bend and hydrostatic pressure tests

100% ultrasonic weld inspection

Heat‑batch chemical composition analysis

ASTM standard Mill Test Report (MTR), third‑party inspection available

Packaging & Delivery

Packaging: Bundled with heavy‑duty steel strips, wrapped in waterproof woven cloth, plastic end caps for protection

Marking: ASTM A53 GR.B, ERW, DN300, 323.9×WT, heat number, batch number, "Low Pressure Fluid Pipe"

Trade Terms: FOB, CIF, CFR, DAP

Shipping Ports: Tianjin, Qingdao, Shanghai, Ningbo

Customization: Custom wall thickness, anti‑corrosion coating, length and pipe‑end forms supported

Contact Us

For quotation, stock availability, delivery schedule and customized solutions of ASTM A53 GR.B ERW Steel Pipe DN300 For Low Pressure Fluid, please contact our sales team. We provide ASTM‑compliant ERW steel pipes and professional technical support for your low‑pressure fluid transmission and municipal engineering projects.

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.