Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of 76~660mm black hfw pipe raw material for further processing steel tube in China. Welcome to buy discount 76~660mm black hfw pipe raw material for further processing steel tube made in China here from our factory. Quality products and low price are available.
Product introduction
1. Product Overview
Product Name
76~660mm Black HFW Pipe Raw Material For Further Processing Steel Tube
Brief Introduction
This series black HFW pipe is unfinished bare high-frequency welded carbon steel tube, produced from premium hot-rolled steel coils as raw stock. The black matte surface comes from natural iron oxide layer formed after HFW welding & online heat treatment, without anti-corrosion coating. It is specially manufactured as blank raw material for post secondary processing, including galvanizing, 3LPE/FBE anti-corrosion coating, threading, bending, machining, cutting, pipe fitting fabrication and deep mechanical processing. Our HFW production line adopts 100–500kHz high-frequency induction welding technology, narrow heat-affected zone (HAZ), uniform wall thickness, precise outer diameter tolerance and stable weld integrity. All pipes pass full inline NDT inspection before delivery, ideal for factories, coating plants, machinery manufacturers and pipeline fabricators to conduct customized reprocessing.
2. Core Advantages For Secondary Processing
Stable Weld Quality For Deep Machining High-frequency squeeze welding removes internal & external weld flash completely online; narrow HAZ avoids weld hardening, supporting cold bending, rolling, tapping and mechanical cutting without cracking. 100% UT eddy current testing eliminates hidden weld defects, reducing scrap rate during customer reprocessing.
Uniform Black Bare Surface, Easy Post Coating Natural black oxide surface without oil, paint or galvanized layer; easy pickling, sand blasting and adhesion for 3PE, FBE, epoxy, zinc coating and paint finishing, no coating peeling risk.
Ultra Precise Dimensional Tolerance OD range strictly controlled 76–660mm, wall thickness evenness ±0.15mm, straightness & ovality meet API/ASTM standard; ensures consistent machining precision for finished pipe products.
Controllable Raw Material Metallurgy Low C/P/S hot rolled coil raw material, balanced carbon equivalent, excellent weldability and formability; customizable steel grades for high-strength forming or low-pressure processing demand.
Flexible Custom Blank Sizes Custom cut length, plain end/bevel end options; bulk raw tube supply for mass secondary processing, stable factory delivery capacity.
3. Full Technical Specification Table
|
Item |
Standard Parameter |
Customizable Range |
|
Outer Diameter (OD) |
76mm – 660mm |
All intermediate sizes supported |
|
Wall Thickness (WT) |
3.0mm – 20mm |
Custom thin/thick wall per drawing |
|
Standard Length |
6m, 12m (DRL) |
0.5–18m fixed random length, cut-to-length |
|
Surface Finish |
Black bare uncoated (natural iron oxide black surface) |
Light anti-rust oil optional for storage |
|
Pipe End Type |
Plain square cut ends |
Beveled ends, deburred ends |
|
Welding Process |
HFW High Frequency Induction Welding |
Flash trimmed inside & outside |
|
Main Steel Grades |
API 5L Gr.B, X42, X52, X60, X65 ASTM A53 Gr.A/Gr.B, A500 Gr.B/C EN10219 S275JR, S355JRH |
Q235B, Q355B custom low alloy grades |
|
Executed Standards |
API 5L PSL1/PSL2, ASTM A53, ASTM A252, EN10217, GB/T3091 |
JIS, BS, AS international standards available |
|
Raw Material Source |
Prime hot rolled carbon steel coils |
Low impurity coil with chemical inspection report |
4. Complete Manufacturing Process
Raw Material Incoming Inspection: Hot rolled coil chemical composition & mechanical test, surface flaw UT scanning
Uncoiling & Strip Levelling: Eliminate coil deformation for uniform forming
Continuous Roll Forming: Gradual rolling strip into circular tube blank
HFW High Frequency Welding: 100–500kHz induction heating, squeeze roll metallurgical bonding
Internal & External Weld Flash Trimming: Smooth weld seam for post processing
Online Weld Heat Annealing: Eliminate welding stress, improve forming toughness
Straightening & Sizing: Strict OD, roundness, straightness calibration
Full NDT Inspection: Ultrasonic + Eddy current test for weld defect 100%
Hydrostatic Pressure Test: Standard water pressure tightness inspection
Fixed Length Cutting, End Deburr & Finishing
Final Dimension & Surface Inspection → Black bare finished raw tube
5. Strict Quality Test Items
All black HFW raw tubes for further processing complete full batch testing with EN10204 3.1B mill test certificate:
Chemical composition analysis of steel coil raw material
Mechanical test: Tensile strength, yield strength, elongation, hardness
Flattening test, cold bending test, guided bend test for weld performance
Inline ultrasonic weld flaw detection, eddy current inspection
Hydrostatic pressure leak test
Dimension measurement: OD, wall thickness, length, ovality, straightness
Visual surface inspection, weld seam smoothness check
6. Main Application Scenarios (Further Processing Fields)
This black HFW raw tube is blank base material for downstream reprocessing factories:
Anti-corrosion Coating Processing Plant Raw tube for 3PE, FBE, coal tar epoxy, internal epoxy coating finished pipeline for oil & gas, water transmission
Galvanizing Factory Hot-dip galvanized steel pipe for construction frame, fire fighting, municipal gas pipelines
Pipe Fitting & Machining Workshop Threading, tapping, flange welding, bending, stamping for mechanical parts, support brackets
Machinery Manufacturing Processing into roller tubes, mechanical housing, engineering structural steel tubes
Construction & Prefabrication Cut, bent, welded for building steel frames, guardrails, scaffolding base tubes
Low-pressure Fluid Pipeline Fabrication Post-process finished tubes for water, gas, steam conveying engineering
7. Packing & Delivery Solution
Small diameter (76–219mm): Bundled with steel strips, plastic end caps to prevent end scratch, waterproof paper wrapped outside bundle
Large diameter (219–660mm): Bulk loading in container/vessel, separate rubber cushion between layers to avoid surface collision damage
Custom packing: Wooden frame fixed, anti-rust oil coating on surface for long sea transportation
Delivery cycle: 7–15 working days for mass order, spot stock available for regular sizes 76–426mm
8. Company Advantage – Hebei Huayang Steel Pipe
Professional HFW pipe manufacturer with 12+ years production experience, annual output over 1 million tons
6 fully automatic HFW production lines, covering full OD range 76–660mm to meet all secondary processing raw material demand
Independent raw coil purchasing & inspection workshop, stable material quality control
Export experience to Middle East, Southeast Asia, Central Asia, Europe; supply raw tube for local coating & machining factories
Full certification: API 5L, ISO9001, CE, third-party SGS/BV inspection acceptable
Custom technical support: Adjust steel grade, wall thickness, mechanical performance according to customer secondary processing technology
FAQ
Q1: Why choose black bare HFW pipe instead of finished coated pipe as processing raw material?
A: Black HFW pipe has no pre-coated anti-rust layer. Customers can conduct self-customized galvanizing, 3PE, epoxy coating or mechanical machining without removing old coating layer, saving labor & material cost and guarantee coating adhesion effect.
Q2: Can you adjust weld hardness for cold bending processing?
A: Yes, we add online weld annealing procedure during production upon request, reduce weld zone hardness to support large-angle cold bending without crack.
Q3: What certificates can you provide for raw material reprocessing?
A: EN10204 3.1B mill test certificate with coil chemical & mechanical data, UT test report, hydrostatic test record; SGS/BV third-party inspection certificate support.
Q4: Is light anti-rust oil available for long sea transport?
A: Optional thin transparent anti-rust oil coating on surface, easy to remove by pickling/sand blasting before secondary coating processing.
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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
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