API Oil Pipes Mills Manufacturers

Shijiazhuang Faith Machinery Co.,Ltd is among manufacturers offering API Oil Pipes Mills, engineered to produce seamless‐quality, welded tubes conforming to API 5L and API 5CT standards for oil and gas exploration, transmission, and production. These mills deliver the precision, mechanical properties, and traceability required by pipeline and well‐casing applications.

1. Production Line Composition

1. High‑Tensile Strip Feeding

• Decoilers accommodate high‑strength low‑alloy (HSLA) and microalloyed carbon steel strip with thicknesses from 2 mm to 12 mm. Tension levelers condition the material to remove coil set.

2. Forming and ERW Welding

• Progressive roll stands shape the strip into pipes with diameters from 60 mm up to 406 mm. High‑frequency ERW welding heads ensure a narrow heat‑affected zone and low weld seam HAZ hardness.

3. Sizing and Heat Treatment

• Sizing stands correct geometry. Embedded in the line, induction heat treatment units temper the weld seam to achieve required toughness and yield strength.

4. Non‑Destructive Testing and Marking

• Inline ultrasonic and electromagnetic flaw detectors scan the weld seam and parent material. Laser marking heads apply API line pipe grade, heat number, and length marking for full traceability.

2. Compliance with API Standards

• Material Certification: Mills integrate mill test report (MTR) handling to link each coil’s chemical and mechanical properties to the final pipe segments.

• Weld Quality Requirements: ERW power settings and cooling rates are controlled to maintain Charpy V‑notch impact values per API 5L grade requirements at temperatures down to –20 °C.

• Dimensional Tolerances: Laser and ultrasonic gauge systems ensure outer diameter and wall thickness meet API tolerances (±1% OD, ±10% WT).

3. Operational Excellence

• Continuous Coil Change: Strip accumulators enable coil swaps without stopping the main line, supporting long, uninterrupted runs essential for large batch orders.

• Cut‑to‑Length Precision: Flying cutoff saws deliver pipe lengths from 3 m to 12 m with ±5 mm accuracy, minimizing downstream machining operations.

• Bundling and Stacking: Automated loading systems arrange pipes into racks or bundles per customer requirements, streamlining logistics.

4. Automation and Data Integration

• Distributed PLC Architecture: Independently controlled modules—for decoiler, forming, welding, sizing, and testing—communicate over an industrial Ethernet backbone.

• HMI and SCADA: Operators monitor key performance indicators—weld current, heat treat temperature, NDT results—via HMI panels and plant‑wide SCADA dashboards.

• ERP and MES Linkage: Production data export automates order fulfillment, inventory management, and customer reporting.

5. Lifecycle Support and Upgrades

• Commissioning and Qualification: On‑site experts assist with mechanical start‑up, welding procedure qualifications (WPQ), and test runs to verify compliance with API accreditation requirements.

• Training and Certification: Customized programs cover API standard interpretation, NDT operation, and weld parameter optimization.

• Spare Parts and Wear Items: Critical inventory includes induction coil modules, ERW transformer components, ultrasonic probe assemblies, and shear blades.

• Future‑Ready Upgrades: Optional additions such as high‑speed multi‑pass forming stands, AI‑driven weld defect recognition, and hydrogen embrittlement monitoring modules prepare the mill for next‐generation pipeline materials.