China Factory ERW High Frequency Pipe 76-660mm Different Length Customized

Product Description

China Factory ERW High Frequency Pipe 76-660mm Different Length Customized is universal multi-scenario high-frequency straight seam welded carbon steel pipe independently produced by Chinese professional pipe factory, covering full outer diameter range of 76mm to 660mm. Adopting advanced HFW/ERW high-frequency solid-state welding technology, the product complies with global mainstream standards including GB/T3091, ASTM A53, API 5L, EN10219, EN10217, supporting fully customized arbitrary fixed length within 12 meters, solving unified length limitation of standard pipes for diversified engineering design.

Available steel grades include Q195, Q235B, S235JR, ASTM A53 Grade B, L245, X42, S355JR to match structural, fluid, oilfield, fire protection and municipal pipeline projects. Weld realizes complete metallurgical fusion with base metal, equipped with online internal & external flash removal and weld normalization stress relief heat treatment to eliminate welding residual stress. All finished pipes pass 100% full-length hydrostatic tightness test and full weld ultrasonic/eddy current non-destructive inspection to guarantee stable airtight and bearing performance. Multiple surface treatments are optional: black anti-rust oil, hot dip galvanized, 3PE/FBE anti-corrosion, internal epoxy lining, and diversified pipe end processing including plain, beveled, grooved and threaded ends. Supported flexible length customization makes it widely applicable to construction, agriculture, municipal, energy and machinery industries, with complete inspection certificates and factory direct bulk supply for global purchasers.

## 1. Basic Product Specifications - \\Product Name\\: China Factory ERW High Frequency Pipe 76-660mm Different Length Customized - \\Executive Standards\\: GB/T3091, ASTM A53 Type E, API Spec 5L, EN10219, EN10217 - \\Outer Diameter Range\\: 76mm ~ 660mm full series medium & large diameter ERW pipe - \\Wall Thickness Range\\: 2.0mm – 22mm, standard wall STD/SCH40/SCH80 + custom thick wall drawing support - \\Optional Steel Grades\\: Q195, Q235B, S235JR, ASTM A53 Grade B, L245, X42, S355JR - \\Core Custom Advantage\\: Unlimited length customization, arbitrary fixed length within 0.5m–12m, no extra high surcharge for non-standard length - \\Production Process\\: Hot rolled coil slitting → multi-roll precision forming → HFW high-frequency ERW welding → internal & external burr removal → weld normalization heat treatment → sizing & straightening → custom fixed-length cutting → full standard inspection - \\Standard Reference Length\\: 6m / 9m / 12m (stock conventional sizes) - \\Custom Length Range\\: 0.5m ~ 12m, support mixed multiple lengths in one batch order - \\Applicable Scenarios & Media\\: Municipal water/gas pipeline, fire fighting pipeline, oilfield auxiliary pipeline, greenhouse skeleton, building scaffolding, heavy machinery structural support, industrial circulating fluid delivery - \\Design Working Pressure\\: 0.6–6.4MPa (adjustable by wall thickness customization) - \\Pipe End Options\\: Plain flat ends, 30°~37.5° welding beveled ends, grooved ends, NPT/BSP threaded ends, plastic anti-collision protective caps - \\Surface Treatment Choices\\: Black anti-rust oil, red fire epoxy paint, hot dip galvanized, 3PE three-layer anti-corrosion, double FBE coating, food-grade internal epoxy lining - \\Core Features\\: China integrated ERW factory supply, full 76–660mm OD series, fully customizable arbitrary pipe length, multiple steel grade matching, stress-relieved defect-free weld, 100% hydrostatic & NDT inspection, multi-type anti-corrosion & pipe end customization, universal for all engineering fields

## 2. Core Product Advantages ### 2.1 Flexible Full Custom Length Service, Solve Engineering Dimensional Matching Problems Different from most suppliers only providing fixed 6/9/12m standard pipes, our factory equips multi-mode numerical control cutting equipment to realize arbitrary length customization between 0.5m and 12m. Support mixed shipment of multiple different lengths in one container, avoid secondary on-site cutting waste, reduce labor cost and construction time loss, perfectly match complex design drawings of high-rise buildings, oilfield stations, large greenhouses and municipal renovation projects. Short small-length pipes and ultra-long near-12m pipes are both available for mass production.

2.2 Complete 76–660mm Outer Diameter Series, One-Stop Centralized Procurement

Covers all mainstream medium and large diameter ERW pipe specifications for global construction, energy, agriculture and municipal engineering, fully compatible with GB, ASTM, API, EN standard pipe fittings, elbows, tees and flanges. Buyers can complete all caliber and mixed-length procurement from single Chinese factory, simplify multi-supplier communication and logistics links, cut overall purchasing cost and shorten project delivery cycle.

2.3 Independent Chinese Factory Full Production Line, Strict Quality Control

Self-owned hot rolled coil storage warehouse, automatic HFW high-frequency welding production line and independent anti-corrosion processing workshop, all production links finished in-house without outsourcing processing. Raw material incoming inspection, online forming monitoring, weld heat treatment, finished pipe pressure test and NDT inspection form full closed-loop quality control system, avoid intermediate dealers markup, offer competitive ex-factory bulk price for large orders.

2.4 Multi-Grade Steel Matching, Adapt To All Working Conditions

Rich steel grade selection covers light load structural (Q195), conventional fluid transmission (Q235B/S235JR), petroleum oilfield (L245/X42) and heavy high-pressure heavy load (S355JR) materials. Customers can freely select steel grade according to project load, pressure and temperature requirements, balance cost and service performance, applicable to indoor overhead, underground buried, coastal salt fog, desert saline soil and cold northern low-temperature environments.

2.5 Advanced HFW Weld + Weld Normalization, Stable Long-Term Service Performance

Flux-free high-frequency induction concentrated heating forms narrow heat-affected zone without coarse grain embrittlement. Online weld normalization heat treatment eliminates massive residual stress generated during welding, effectively prevent weld cracking under long-term alternating pressure, soil extrusion and pipeline vibration. 100% full-length hydrostatic tightness test and full weld ultrasonic scanning NDT eliminate leakage hidden danger of fluid pipelines and structural fracture risk of load-bearing pipes.

2.6 Diversified Supporting Customization, One-Stop Processing Solution

Besides core length customization, we provide integrated supporting customization including wall thickness, pipe end processing and anti-corrosion coating. No need to cooperate with multiple processing factories separately; all finished pipes can be delivered directly to construction sites after one-stop factory processing, greatly simplifying customer procurement and construction management work. Complete official MTR test reports and third-party inspection documents support global project acceptance.

## 3. Dimensional Tolerance Standard | Inspection Item | Standard Tolerance | | ---- | ---- | | Outer Diameter (76mm–168mm) | ±0.8% nominal OD | | Outer Diameter (168mm–660mm) | ±1.0% nominal OD | | Wall Thickness | +12% / −10% nominal thickness; tight tolerance for high-pressure thick wall | | Pipe Straightness | ≤1.5mm per meter | | Out-of-Roundness | ≤1.0% of outer diameter | | Custom Cutting Length | +50mm / 0mm (higher precision for custom length compared to standard pipes) |

## 4. Mechanical & Chemical Properties ### 4.1 Mechanical Properties | Steel Grade | Min. Yield Strength | Tensile Strength | Min. Elongation | Mandatory Factory Test | | ---- | ---- | ---- | ---- | ---- | | Q195 | ≥195MPa | 315–430MPa | ≥27% | Flattening test, cold bending test, weld NDT | | Q235B / S235JR | ≥235MPa | 360–510MPa | ≥26% | 100% hydrostatic test, full weld UT/ET inspection, 180° cold bending test | | ASTM A53 Grade B | ≥240MPa | ≥415MPa | ≥20% | Hydrostatic tightness test, reverse bend test | | L245 | ≥245MPa | 415–655MPa | ≥20% | Full weld scanning, optional low-temperature impact test | | S355JR | ≥355MPa | 470–630MPa | ≥21% | Impact sampling inspection, enhanced hydrostatic test |

4.2 Maximum Allowable Chemical Composition (Mass %)

Note: All pipes pass flattening and cold bending test without crack; low-temperature Charpy impact test report can be customized for cold region projects.

## 5. Complete Manufacturing & Custom Cutting Process 1. \\Raw Material Inspection\\: Inspect chemical composition and mechanical performance of hot rolled steel coils, screen qualified raw materials matching customer steel grade requirements. 2. \\Slitting & Edge Levelling\\: Precision slitting according to target wall thickness, polish strip edge oxide scale to ensure stable uniform welding gap. 3. \\Multi-Roll Continuous Precision Forming\\: Gradual rolling molding to guarantee uniform roundness and consistent wall thickness of pipe blank. 4. \\HFW High-Frequency ERW Welding\\: Closed-loop automatic parameter control to realize full penetration metallurgical weld without filler metal. 5. \\Internal & External Weld Burr Removal\\: Online mechanical scarving to clear welding flash for smooth inner pipe wall. 6. \\Weld Normalization Stress Relief Heat Treatment\\: Eliminate welding residual stress, improve weld toughness and anti-cracking performance. 7. \\Sizing & Straightening\\: Precision sizing mill calibrate outer diameter to standard tolerance, straightener correct pipe linearity. 8. \\Numerical Control Custom Fixed-Length Cutting\\: Automatic cutting according to customer customized length data, neat burr-free cut ends, support mixed multiple length cutting in one batch. 9. \\Full Standard Performance Inspection\\: 100% hydrostatic tightness test, full weld non-destructive flaw detection, full dimensional reinspection. 10. \\Custom Processing & Anti-Corrosion Construction\\: Grooving/threading/beveling pipe end processing + customized anti-rust/anti-corrosion coating construction as per project demands. 11. \\Laser Permanent Marking\\: Mark standard, steel grade, OD×WT, actual custom length, batch number and anti-corrosion type on each pipe body. 12. \\Export Standard Protective Packaging\\: Wear-resistant PE film wrapping, high-strength steel strip bundling, plastic anti-collision end caps to avoid scratch and collision damage during long-distance transportation.

## 6. Main Application Scope - Municipal Engineering: Urban tap water, natural gas, rainwater buried pipeline, outdoor fire protection pipeline - Oil & Gas Industry: Oilfield water injection, crude oil gathering, associated gas auxiliary transmission pipeline - Construction & Scaffolding: Building exterior scaffolding, high-rise heavy load support pipe, temporary construction frame - Agricultural Engineering: Single/multi-span greenhouse skeleton, livestock breeding shed support frame - Industrial Manufacturing: Factory circulating water pipeline, mechanical equipment chassis support pipe, light steel workshop main frame - Global EPC Custom Projects: Overseas engineering requiring non-standard different customized length ERW high frequency pipes

## 7. Quality Inspection & Factory Certification - Fully compliant with GB/T3091, ASTM A53, API 5L, EN10219, EN10219 international standards - ISO 9001 certified full HFW production line, professional Chinese integrated ERW pipe manufacturer - Dual inspection system: base pipe hydrostatic & full weld NDT inspection + finished custom processing & anti-corrosion appearance/thickness inspection - Complete set of Mill Test Report (MTR), weld inspection certificate, hydrostatic test record supplied with each batch shipment - Support SGS, BV, TUV third-party on-site sampling inspection required by global engineering bidding projects - Full batch traceability system covering steel coil raw material to finished custom-length pipe delivery

## 8. Packaging & Bulk Delivery Arrangement - \\Packaging\\: Bare black pipes coated with anti-rust oil wrapped with waterproof PE film; galvanized/3PE anti-corrosion pipes with double-layer wear-resistant protective film, bundled with high-strength steel strips, plastic anti-collision caps installed at both pipe ends. - \\Product Marking\\: Laser permanent marking including execution standard, steel grade, OD×wall thickness, actual custom length, batch number and surface treatment type. - \\Trade Terms\\: FOB, CIF, CFR, DAP global sea and land bulk delivery, support inland truck transport to construction sites - \\Main Shipping Ports\\: Tianjin, Qingdao, Shanghai, Ningbo, support full container mixed-length bulk loading - \\Customization Service\\: Arbitrary fixed length 0.5–12m, mixed multiple lengths in one order, adjustable wall thickness, multi-type anti-corrosion coating and special pipe end processing - \\Delivery Cycle\\: Conventional standard length stock pipes 3–7 working days; custom different length + special processing pipes 10–18 working days

## 9. Why Choose Our Chinese Custom Length ERW High Frequency Pipe Factory 1. Professional Chinese ERW high frequency pipe manufacturer with numerical control cutting equipment, support arbitrary customized length within 0.5–12m and mixed multi-length batch delivery 2. Complete 76–660mm full outer diameter series, multiple steel grade options to match structural, fluid, oilfield and fire protection all engineering demands 3. Integrated full-process production line without outsourcing, independent welding and anti-corrosion workshop, stable quality and competitive factory direct wholesale price 4. HFW weld normalization heat treatment + 100% full weld NDT & hydrostatic test, eliminate pipeline leakage and structural fracture hidden danger 5. One-stop integrated customization service: length, wall thickness, pipe end, anti-corrosion coating all processed in factory, reduce customer secondary processing cost 6. Complete official inspection documents, pass third-party sampling inspection, stable mass production capacity for long-term large EPC project cooperation

## Contact Us For factory wholesale quotations, detailed technical data sheets, custom length cutting solutions, bulk mixed-length order discounts and delivery schedules of \\China Factory ERW High Frequency Pipe 76-660mm Different Length Customized\\, please contact our professional global sales team. As a reliable Chinese ERW high frequency pipe manufacturer, we supply full OD range custom fixed-length welded carbon steel pipes and one-stop multi-dimensional customized processing solutions for global municipal, oilfield, construction, agricultural and mechanical engineering bulk procurement projects.

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