High-Precision Shaped Steel Pipe for Fluids Transmission with Cold-Drawn Process

1. Produced as cold-drawn seamless shaped carbon steel tube, compliant with API 5L, ASTM A106, DIN 1629, EN10216, JIS G3454/G3455/G3456 global industrial standards
2. Support complex custom cross-sectional shapes, including flower tube, rectangular, square, oval and special irregular shaped profiles with ultra-precise dimensional tolerance
3. Wide size coverage: Outer diameter 10.3–1219.2mm, wall thickness 1.65–60mm; fixed standard lengths 5.8m/6m/11.8m/12m or customized cut-to-length
4. Advanced cold-drawn forming process delivers high material density, smooth inner & outer surface without burrs, excellent finish for direct machining
5. Flexible minimum order quantity, accept small batch custom shaped tube orders for prototype and small engineering projects
6. Standard pipe end protection: Plastic caps installed on both ends to avoid collision damage during sea and land transportation
7. Uniform steel strapping bundling, all tubes from the same furnace batch with consistent grade & specification for traceability
8. Compatible with secondary CNC processing, bending, welding, surface anti-rust coating for fluid transmission and mechanical structural parts

Our shaped steel tube adopts precision cold-drawn seamless manufacturing technology based on high-quality carbon steel raw materials. Different from standard round pipes, it can realize customized complex transverse cross-section designs to meet unique structural layout and space-saving requirements of machinery, fluid delivery and construction projects.

All products strictly follow international pipeline standards including ASTM A106 and API 5L, with full dimensional control on OD, wall thickness and straightness. The cold-drawn process optimizes internal metal grain structure, improving material density and mechanical uniformity.

We supply standard square, rectangular, flower shaped tubes as stock items, plus fully custom irregular special profiles per customer drawings. Mainly used for gas, water, oil fluid transmission pipelines and mechanical hollow structural components, widely matched with our one-stop CNC machining service for finished parts delivery.

• Low-medium carbon seamless steel designed for medium & high-temperature fluid pipeline service
• Balanced tensile strength, yield strength and ductility, good cold forming and welding performance
• Stable metallographic structure after cold drawing, uniform mechanical properties along the whole tube length
• Strict control of sulfur & phosphorus impurities to reduce brittleness, long service life under continuous fluid conveying
• Easy surface treatment: Black anti-rust paint, hot galvanizing, 3PE coating for outdoor & marine transportation

• Pipeline dedicated carbon steel with excellent pressure resistance for oil & gas long-distance transmission
• Low carbon formula reduces welding crack risk, suitable for field pipeline assembly
• Fine grain structure improves impact toughness under low temperature working environments

We supply matching shaped tubes, seamless pipes and hollow bars of multiple material systems for all industrial scenarios:

1. Carbon Steel Series: ASTM A106 A/B/C, API 5L A/B/X42/X52, A500 A36, SS400
2. Alloy Mechanical Tubing: ASTM A519 4130/4140, SA335 P11/P22/P91 heat resistant alloy
3. Stainless Shaped Tube: 304, 316L, 321 austenitic stainless square & special profiles
4. Super Corrosion Resistant Alloy: Alloy 28 N08028, ASTM B167 nickel alloy shaped blanks
5. Structural Hollow Section: Large diameter square/rectangular carbon steel pipe

Break the limitation of standard round tubes, support flower, oval, multi-edge and irregular special shapes to optimize structural layout and save installation space.

Cold forming achieves tight dimensional tolerances, high material density and mirror-smooth inner/outer surfaces, no secondary polishing required for most machining projects.

Accept small MOQ custom orders, ideal for new equipment prototype, small-batch mechanical modification and special engineering projects.

Uniform wall thickness and seamless structure eliminate leakage risk, reliable for oil, water, gas medium long-distance transportation pipelines.

Low carbon steel base supports cutting, drilling, bending, CNC turning and all mainstream welding processes for on-site assembly.

End plastic protective caps + steel strip uniform bundling, same furnace batch unified marking to avoid mixing and rust damage during long sea shipping.

• Fluid Transmission Industry: Oil, natural gas, industrial water, chemical medium conveying shaped pipeline
• Mechanical Manufacturing: Hollow transmission shafts, hydraulic cylinder blanks, special equipment structural supports
• Construction Engineering: Decorative special shaped steel frame, light load building structural profiles
• Automobile Industry: Chassis special hollow components, exhaust shaped pipeline
• Boiler & Power Plant: Low-pressure heat exchange special shaped tubing
• General Equipment: Frame support, machinery guard special section parts

We provide integrated forging and precision machining services, and can produce finished components strictly according to customer drawings:

• Turning, milling, planing, drilling, boring, grinding
• Gear cutting, CNC precision machining
• Sizing cutting, surface treatment and finishing

We have supplied a wide range of forged and machined parts including shafts, cylinders, hollow bars, pistons, tube sheets, rings and disc bearings to customers worldwide.

We have a professional QC inspection team and complete testing equipment to ensure stable and reliable product quality:

• Ultrasonic testing (UT) for internal defects
• Tensile and hardness testing for mechanical properties
• High-precision dimensional measurement
• Spectrometer for chemical composition verification
• Metallographic microstructure inspection

Every batch of products undergoes strict inspection before delivery to meet the quality requirements of various engineering projects.

• Inner packaging: waterproof polybag for moisture and dust protection
• Outer packaging: reinforced wooden case / wooden pallet, suitable for long-distance international transportation
• Custom packaging solutions available upon request

• Normally 10 – 45 days after receipt of advance payment
• Exact delivery time depends on order quantity, specification complexity and machining requirements