Name: China ASTM A672 Optional HFW Straight Pipe 76~660mm Medium Temperature Service Tube Manufacturers Suppliers Factory - Huayang Steel Pipe
Brand: Huayang
SKU: 308915137

Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of astm a672 optional hfw straight pipe 76~660mm medium temperature service tube in China. Welcome to buy discount astm a672 optional hfw straight pipe 76~660mm medium temperature service tube made in China here from our factory. Quality products and low price are available.

Product introduction

1. Product Overview

Product Name

ASTM A672 Optional HFW Straight Pipe 76~660mm Medium Temperature Service Tube

Core Standard

ASTM A672 / A672M Standard Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures

Core Definition

This series medium temperature service tube adopts HFW High-Frequency Longitudinal Welding technology, matched with pressure vessel grade carbon steel plate, fully compliant with ASTM A672 code for moderate temperature & high-pressure working conditions. Our production range covers outer diameter 76mm to 660mm, fills the small & medium diameter blank of traditional A672 submerged arc welded pipe, balancing dimensional accuracy, welding stability and engineering cost-effectiveness.

2. Key Technical Specifications

2.1 Dimension Range

Outer Diameter: 76 mm ~ 660 mm

Wall Thickness: 3.0 mm ~ 22 mm (custom thick wall available upon request)

Standard Length: 6m / 12m, random length 5.8–11.8m, fixed cut length support

Tolerance: Strict OD, WT, straightness, ovality tolerance per ASTM A672M

2.2 Available Material Grades (ASTM A672)

Grade	Base Plate Standard	Min Tensile Strength	Min Yield Strength	Main Service Temp
B55	A285 Gr.C	379 MPa	207 MPa	≤340℃
B60	A515 Gr.60	414 MPa	221 MPa	≤370℃
C60	A516 Gr.60	414 MPa	221 MPa	≤400℃
C65	A516 Gr.65	448 MPa	241 MPa	≤400℃
C70	A516 Gr.70	483 MPa	262 MPa	≤427℃

2.3 Working Condition Parameter

Operating Temperature Range: -29℃ ~ 427℃ (-20℉ ~ 800℉)

Service Type: Medium temperature high-pressure fluid conveying

Heat Treatment Option: As-welded / Normalized / Normalized & Tempered (Class 1/2/3 per A672)

3. Manufacturing Process (HFW High Frequency Welding)

Raw Material Inspection: Pressure vessel grade hot rolled coil/plate, full heat chemical analysis

Continuous Forming: Precision roll forming to circular tube blank

HFW Solid-State Welding: High-frequency induction heating, pressure forge welding without filler metal; narrow heat affected zone, uniform metallurgical combination between weld & base metal

Weld Internal & External Burr Removal: Smooth inner surface, reduce fluid flow resistance

Heat Treatment (Optional): Normalizing or tempering to eliminate welding stress, stabilize mechanical property for medium temperature service

Sizing & Straightening: Control ovality, straightness within ASTM tolerance

Cutting & End Facing: Square pipe ends, chamfer for welding installation

Full-Range Nondestructive Testing

4. Strict Quality Inspection & NDT Standards (ASTM A672 Mandatory)

Chemical Composition Test: Each heat batch plate & weld metal deposit analysis

Mechanical Performance Test

Tensile test per production lot

Transverse guided weld bend test (2 specimens per lot)

Full-Length Weld Inspection

100% UT Ultrasonic Testing for weld seam

Optional 100% RT Radiographic Examination (supplementary requirement for critical projects)

Hydrostatic Pressure Test: Every pipe hydro test per A672 pressure standard

Dimension & Visual Inspection: OD, wall thickness, length, surface defect full check

Third-Party Inspection Acceptable: SGS, BV, TÜV, Lloyd's certification

5. Outstanding Product Advantages

Wide Size Coverage 76–660mm OD Break the limitation that traditional ASTM A672 EFW pipe starts at 400mm OD; HFW production realizes small & medium diameter medium temperature pressure pipe supply, more flexible for small-bore branch pipelines.

Superior HFW Weld Performance Solid-state forge welding, no weld porosity/slag inclusion risk; weld mechanical strength ≥90% base metal, stable long-term operation under medium temperature cyclic pressure load.

Stable Medium Temperature Mechanical Property Matched with A516/A285 pressure vessel steel, excellent high-temperature tensile & creep resistance, no plastic deformation under long-term 300–427℃ working state.

High Dimensional Precision Roll forming + online sizing control, wall thickness tolerance ±0.3mm, small ovality, convenient flange & butt welding construction on site.

Cost & Delivery Advantage Continuous HFW production line with high efficiency, shorter lead time than LSAW seamless pipe; obvious cost advantage for large-volume industrial piping projects.

Customization Support Custom wall thickness, fixed length, heat treatment mode, surface anti-corrosion coating (black varnish, 3PE, epoxy coating) and pipe end processing (bevel, plain end, thread).

6. Main Application Scenarios

Power Industry: Power plant feedwater pipe, medium-temperature steam pipeline, boiler auxiliary circulation tube

Petrochemical Refinery: Medium temperature process fluid transfer line, heat exchanger connecting pipe, oil & gas medium pressure delivery pipeline

Chemical Plant: Medium temperature coolant, medium-pressure industrial gas transmission piping

Pressure Vessel Auxiliary: Supporting connecting pipe for medium temperature pressure vessels

Central Heating & Industrial Furnace: High-temperature hot water, flue gas medium pressure pipeline

7. Surface Treatment & Packaging

Surface Options

Black anti-rust varnish (standard delivery)

Shot blasting SA2.5 for coating pretreatment

External 3PE / 2PE anti-corrosion coating

Internal epoxy coating for clean medium transport

Packaging

Small diameter pipes: Bundled with steel strips, plastic end caps for anti-dust & anti-rust

Large diameter pipes: Separated by wooden support, waterproof tarpaulin wrapping

Custom marking: ASTM A672 grade, OD×WT, heat number, batch number, manufacturer logo (Hebei Huayang) printed on pipe body

8. Manufacturer Strength | Hebei Huayang Steel Pipe

Professional HFW production lines covering OD76–660mm, annual output 300,000 tons

Complete ASTM A672 full-grade production capacity, independent heat treatment workshop

Full internal testing laboratory with UT, RT, tensile, bending, hydro test equipment

Rich export experience for Middle East, Southeast Asia petrochemical & power projects, comply with international engineering procurement standards

Provide one-stop service: Technical drawing support, third-party inspection, loading supervision, custom anti-corrosion processing

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.