Pipe

Industrial Metal Pipes Manufacturer & Wholesale Supplier

Shanxi Yuanhang Machinery Construction Industry and Trade Co., Ltd. manufactures and supplies industrial-grade metal pipes engineered for fluid transmission, pressure piping, structural frameworks, and municipal infrastructure. Our production and processing capabilities cover cold drawing, hot rolling, precision cutting, and anti-corrosion coating treatments, serving global distributors, EPC contractors, and industrial equipment manufacturers.

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Product Range

Carbon Steel Seamless Pipes

Heavy-wall seamless carbon steel pipes manufactured to ASTM A106 Grade B, ASTM A53, and API 5L specifications for high-pressure oil, gas, and water systems.

Stainless Steel Pipes

Austenitic stainless steel pipes in grades SS304/304L and SS316/316L, designed for corrosive fluid handling, chemical processing, and sanitary applications.

Welded Industrial Pipes

Electric Resistance Welded (ERW) and Longitudinal Submerged Arc Welded (LSAW) carbon steel pipes built for low-to-medium pressure fluid transport and structural steel supports.

Coated & Lined Infrastructure Pipes

External anti-corrosion coated pipes featuring 3PE (Three-Layer Polyethylene), FBE (Fused Bond Epoxy), or hot-dip galvanized finishes for underground and coastal installations.

Materials & Technical Specifications

Category	Parameter	Specifications
Carbon Steel Seamless Pipes	Standard / Grade	ASTM A106 Gr. B, ASTM A53 Gr. B, API 5L Gr. B / X42 / X52
Carbon Steel Seamless Pipes	Material Options	Killed Carbon Steel (AISI 1020, 1045, Q345B)
Carbon Steel Seamless Pipes	Size / Dimension Range	NPS 1/8 inch–24 inch (DN6–DN600) / Wall Thickness: Sch 10 to XXS
Carbon Steel Seamless Pipes	Surface Finish Options	Bare, Black Painted, Anti-Rust Oil, Hot-Dip Galvanized
ERW & LSAW Welded Pipes	Standard / Grade	ASTM A53, EN 10219, GB/T 3091
ERW & LSAW Welded Pipes	Material Options	Q235B, Q355B, Hot-Rolled Carbon Steel Coils
ERW & LSAW Welded Pipes	Size / Dimension Range	Outer Diameter 21.3 mm–1220 mm / Wall Thickness: 2.0 mm–25.4 mm
ERW & LSAW Welded Pipes	Surface Finish Options	Varnished, Lightly Oiled, External PE Coating
Stainless Steel Pipes	Standard / Grade	ASTM A312, ASTM A358, EN 10217-7
Stainless Steel Pipes	Material Options	SS304, SS304L, SS316, SS316L
Stainless Steel Pipes	Size / Dimension Range	NPS 1/8 inch–12 inch / Wall Thickness: Sch 5S, 10S, 40S, 80S
Stainless Steel Pipes	Surface Finish Options	Pickled, Annealed, Polished (180 grit to 400 grit)
Coated Infrastructure Pipes	Standard / Grade	AWWA C210, DIN 30670, ISO 21809
Coated Infrastructure Pipes	Material Options	Carbon Steel Substrate with Epoxy / Polyethylene Coating
Coated Infrastructure Pipes	Size / Dimension Range	Outer Diameter 60 mm–1000 mm
Coated Infrastructure Pipes	Surface Finish Options	3PE External Coating, Internal Cement Mortar Lining

Manufacturing Standards & Quality Control

Every production batch undergoes structured quality verification gates to inspect dimensions, wall thickness uniformity, and structural integrity prior to dispatch:

Standard Compliance: Manufacturing follows ASTM, API, ASME, EN, ISO, and DIN specifications.

Material Traceability: Spectrometric chemical analysis is performed on incoming raw materials. Mill Test Certificates (MTC) conforming to EN 10204 3.1 are provided with all shipments.

Dimensional & Wall Thickness Inspection: Ultrasonic thickness gauges and laser outer diameter measuring instruments verify consistency along the entire pipe length.

NDT & Pressure Testing: Hydrostatic pressure testing is conducted on individual pipe lengths based on calculated yield stress. Welded pipes undergo Eddy Current or Ultrasonic weld seam inspection.

Stainless Steel Water Pipe For Seawater Intake Piping

Customization & Supply Options

Custom Fabrication

Cut-to-length services (exact fixed lengths or random lengths), threaded and coupled ends, beveled ends for welding, and custom internal/external coatings.

OEM Branding & Marking

Stenciled heat numbers, steel grade stamps, standard compliance legends, and protective plastic end caps.

Minimum Order Quantity (MOQ)

Production runs starting from 1 metric ton for standard sizes; trial batch orders supported for non-standard specifications.

Lead Time & Logistics

Standard inventory items ship within 7 to 10 days. Custom production batches typically require 20 to 30 days. Shipped via FOB Tianjin/Qingdao, CIF, or DDP to destination ports.

Our Factory

FAQ

Q: Can you provide EN 10204 3.1 Mill Test Certificates for bulk pipe shipments?

A: Yes. Every shipment includes a 3.1 Mill Test Certificate detailing chemical composition, tensile strength, yield strength, elongation, and hydrostatic test pressure corresponding to the raw steel heat numbers.

Q: What is the standard manufacturing length for your industrial seamless carbon steel pipes?

A: Standard supply lengths include Single Random Length (SRL: 4.8m - 5.8m) and Double Random Length (DRL: 10m - 11.8m). Custom exact lengths are available upon request.

Q: How do you verify wall thickness uniformity on seamless pipes?

A: We utilize multi-channel ultrasonic thickness testing equipment across the entire body and ends of each pipe to detect eccentricities and verify compliance with minimum wall thickness tolerances (such as -12.5% ASTM limits).

Q: Do your stainless steel pipes undergo solution annealing and pickling?

A: Yes. All austenitic stainless steel pipes undergo full solution heat treatment followed by acid pickling and passivation to eliminate internal stresses and restore corrosion resistance.

Q: What non-destructive testing (NDT) is applied to the weld seams of LSAW and ERW pipes?

A: Welded pipes undergo 100% online Ultrasonic Testing (UT) or Electromagnetic Testing (ET) along the weld zone to ensure zero fusion defects or micro-cracks before surface coating.

Q: What is the lead time for custom cut-to-length or specially coated pipe orders?

A: Order processing, cutting, beveling, and protective coating application typically require 15 to 25 working days depending on total tonnage and specification complexity.

Request a Quote

Need industrial metal pipes, structural tubes, or custom-coated piping systems for your next procurement cycle? Send us your material grades, outer diameters, wall thicknesses, lengths, and quantities.

Direct Email: anzhiyuan@yhmadeinprc.com.cn
Required Inquiry Details: Item description, outer diameter/wall thickness (or Schedule), material grade, end finish, and target order quantity.
Response Time: Technical specification verification and commercial quotations provided within 12 hours.

We're well-known as one of the most experienced pipe manufacturers in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to buy discount pipe in stock here from our factory. Contact us for pricelist and free sample.