Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of high frequency straight welded pipe 76-660mm mine ventilation steel pipe in China. Welcome to buy discount high frequency straight welded pipe 76-660mm mine ventilation steel pipe made in China here from our factory. Quality products and low price are available.
Product introduction
Product Overview
Our 76–660mm high frequency straight welded (HFW) mine ventilation steel pipes are professional pipeline solutions specially designed for underground mining ventilation, gas extraction, and dust removal systems. Manufactured with advanced high-frequency induction welding technology, these rigid steel pipes feature airtight welds, low air resistance, high structural rigidity and excellent impact resistance, fully adapting to harsh underground mining environments with dampness, dust, and corrosive gas.
This series of mine ventilation pipes adopts standardized round tube design with complete outer diameter specifications ranging from 76mm to 660mm. The smooth inner wall effectively reduces wind resistance, ensures stable air supply and exhaust efficiency, and avoids dust accumulation and airflow turbulence. With strict compliance with mine safety specifications, the pipes deliver outstanding pressure resistance, deformation resistance and air tightness, widely applicable to coal mines, metal mines, tunnel excavation and underground roadway ventilation projects. Factory direct bulk supply supports customized size and end treatment for various mine engineering procurement needs.
Production Process
Qualified Raw Material Selection: Adopt high-quality low-carbon steel strips with stable mechanical properties and chemical composition, meeting mining pipeline structural safety standards, with good toughness and anti-deformation ability for underground harsh working conditions.
Precision Continuous Forming: Steel strips are rolled and formed through multi-pass precision rolling units to ensure uniform roundness, consistent wall thickness and smooth pipe body, avoiding local deformation that affects ventilation efficiency.
HFW High-Frequency Straight Welding: Non-contact high-frequency induction welding technology realizes narrow heat-affected zone and uniform weld structure. The integrated weld strength is close to the base metal, effectively preventing air leakage and cracking under long-term airflow impact and underground pressure.
Internal & External Weld Bead Trimming: Fully polish internal and external welding beads to eliminate protrusions and gaps, ensure smooth inner and outer pipe walls, reduce airflow resistance and prevent dust and debris deposition.
Online Sizing & Straightening: Precision sizing and straightening process controls pipe straightness and dimensional tolerance within standard range, ensuring accurate pipeline docking and flat laying in mine roadways.
Full-Range Non-Destructive Testing: Each pipe undergoes eddy current flaw detection and air tightness test to eliminate hidden welding defects, ensuring zero air leakage for ventilation and gas extraction systems.
Fixed & Random Length Cutting: Standard 6m/12m random lengths are available, with customized fixed lengths from 1.5m to 18m to adapt to different roadway layout and installation requirements.
Surface Treatment & Finishing: Optional black uncoated finish or anti-rust oil coating; customized anti-corrosion treatment is available for humid and corrosive mine environments to extend service life.
Batch Sampling Inspection: Conduct professional tests on pipe rigidity, impact resistance, air tightness and flattening performance before delivery to meet mine safety acceptance standards.
Technical Specifications
Executive Standards
Welding Process: HFW High-Frequency Induction Straight Welded Core Application: Underground mine ventilation, gas drainage, dust exhaust and tunnel air supply pipelines Applicable Standards: National mine ventilation pipeline specifications, ISO industrial pipeline standards, customized compliance for regional mining safety codes Structural Feature: High airtightness, low wind resistance, anti-deformation, impact resistant
Dimension Scope
Outer Diameter: 76mm – 660mm (complete specifications for mine main and branch ventilation pipelines) Wall Thickness: 2.0mm – 25.4mm, support customized thick wall for high-pressure and deep well mine working conditions Standard Length: 6m, 12m standard random lengths; customizable fixed length 1.5m–18m Dimensional Tolerance: Strict mine pipeline tolerance standard, ensuring seamless on-site assembly and stable pipeline layout
Structural & Air Performance
Air Tightness: Zero air leakage under rated working pressure, ensuring efficient ventilation and gas extraction Wind Resistance: Ultra-smooth inner wall, low airflow friction, stable long-distance air delivery Deformation Resistance: High structural rigidity, resistant to extrusion and impact in narrow roadways Safety Performance: No brittle cracking, adapt to underground temperature and humidity changes
Mechanical Performance
Minimum Yield Strength: 290MPa Minimum Tensile Strength: 400MPa Excellent toughness and bending resistance, pass flattening and impact tests without cracks Stable mechanical performance, suitable for long-term continuous operation in underground mining environments
Product Advantages
Excellent Airtight Ventilation Performance: Integrated HFW straight weld with full NDT inspection completely avoids weld air leakage. The smooth inner wall minimizes wind resistance, ensuring efficient and stable fresh air supply, harmful gas exhaust and dust removal for mine roadways.
High Structural Safety for Mining Conditions: High-strength steel body and rigid welding structure resist underground rock impact, roadway extrusion and vibration deformation, effectively avoiding pipeline damage and ventilation system failure, meeting mine safety operation requirements.
Complete Size Matching: Full OD range of 76–660mm covers all common specifications of mine main ventilation pipelines, branch pipelines and gas extraction pipelines, realizing one-stop procurement for mine ventilation system construction and renovation.
Flexible On-Site Installation: Support customized pipe end processing such as beveling, grooving and threading, compatible with flange, clamp and quick connection methods, improving on-site installation efficiency and reducing construction cycle.
Durable & Low Maintenance: Resist damp corrosion, mine dust abrasion and gas erosion. Stable overall performance reduces later inspection, maintenance and replacement costs of underground ventilation systems.
Mass Factory Stable Supply: Automatic HFW production lines support large-batch customized orders for mine engineering projects, with stable delivery cycle and sufficient inventory to meet centralized construction demand.
Strong Environmental Adaptability: Adapt to dark, humid, dusty and weakly corrosive underground mining environments, suitable for long-term continuous operation in various coal, metal and non-metal mines.
Application Fields
Underground coal mine fresh air supply and waste gas exhaust main pipelines
Mine methane and harmful gas extraction and drainage pipeline systems
Underground roadway dust removal and ventilation auxiliary pipelines
Metal mine and non-metal mine underground ventilation engineering
Tunnel and underground excavation construction temporary ventilation pipelines
Mine underground fire prevention and air pressure balance pipeline system
Large mining project ventilation system upgrading and supporting pipeline facilities
Packaging & Shipment
Standard Packaging: Bundled with high-strength steel strips; plastic protective caps installed at both pipe ends to prevent dust, foreign matter entry and pipe end deformation.
Surface Protection: Optional anti-rust oil coating for long-distance sea transportation and humid storage environments; original black finish for conventional engineering orders.
Shipping Mode: FCL container shipment for medium and small batch orders; bulk vessel loading for large-scale mine project bulk orders.
Loading Protection: Adopt soft buffer pads during loading and transportation to avoid pipe body scratching, extrusion deformation and weld damage.
Custom Service: Support customized bundle weight, project exclusive marks, export standard shipping labels and special packaging for mining engineering EPC projects.
Quality Assurance & Service
Implement full ISO quality management system throughout raw material inspection, production processing and finished product testing to ensure stable batch quality.
Provide complete mill test certificates (MTC), air tightness test reports, NDT inspection records and mechanical performance test documents for each batch of goods.
Support third-party professional inspections such as SGS and BV to meet overseas mining project acceptance standards.
Flexible MOQ, support mixed-specification container orders and long-term fixed-supply framework contracts for mining contractors.
Professional foreign trade team provides one-stop services including professional quotation, production progress tracking, inspection arrangement and complete export document 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.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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