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SMLS Pipe Factory - Seamless Steel Pipe Production Line

SMLS Pipe Factory

State-of-the-art manufacturing · Full-process quality control

Xenith Steel's SMLS plant operates German-engineered PQF 3-roll continuous rolling and MINI-MPM mandrel mills from SMS INNSE and MEER on a 300,000sqm site in Cangzhou, producing 1M tons/year of seamless carbon and alloy pipes OD 38-530mm. The mill rolls API 5L PSL1-3 (X42-X80), ASTM A106/A53 Grade B, ASTM A335 P5/P9/P11/P22/P91 for high-temperature service, and ASTM A519 mechanical tubing. Rotary cutting, ultrasonic 100% wall inspection, and hydrostatic testing at 100% of specified yield are standard. McDermott, Worley, Saipem, TechnipFMC, and Fluor specify Xenith SMLS for oil & gas, refinery, and power generation projects requiring full EN 10204 3.1 traceability.

Alliances: McDermott International (USA), Worley (Australia), Saipem (Italy), TechnipFMC (France), Fluor Corporation (USA)

  • Area: 300,000㎡
  • Number of workers: 550+
  • Main Products: Seamless Carbon Steel Pipe (API 5L, ASTM A106, ASTM A53), Line Pipes, Heat Exchanger Tubes, Precision Tubing
  • Facilities: Rotary Piercing Mills, Mandrel / Plug Rolling Mills, Heat Treatment Furnaces, CNC Pipe Cutting & Threading Machines, Ultrasonic Testing Equipment, Hydrostatic Pressure Testing Machines, Anti-corrosion Coating Lines
  • Annual Capacity: 1,000,000 Tons
  • Applications: Onshore & Offshore Oil & Gas Pipelines, Power Plants, Petrochemical Facilities, Municipal Water & Gas Networks, Mechanical & Automotive Tubing

Factory Introduction

Last updated: May 3, 2026

Xenith Steel SMLS pipe factory produces seamless carbon steel, alloy steel, and low-alloy high-strength steel pipes from 38mm to 530mm OD with 1,000,000 tons annual capacity, serving oil and gas, power generation, and petrochemical industries worldwide. The factory occupies 300,000㎡ in Cangzhou, Hebei Province and employs 550+ workers, operating PQF and MINI-MPM rolling mills, rotary piercing and stretch-reducing mills, heat treatment lines, pipe end thickening and threading lines, finishing lines, and coating lines. Key equipment is sourced from SMS INNSE and MEER (Germany).

Production covers API 5L, ASTM A106, ASTM A53, ASTM A335, and GB/T 8163 standards, with pipe lengths from 6,000mm to 12,500mm and wall thicknesses from 2.5mm to 100mm. Each pipe undergoes ultrasonic testing, hydrostatic pressure testing, magnetic particle inspection, radiographic testing, and chemical analysis before shipment.

Specification

  • Outer Diameter (OD): φ38 mm – φ530 mm
  • Wall Thickness (WT): 2.5 mm – 100 mm
  • Length: 6,000 mm – 12,500 mm (customizable)
  • Material Grades: Carbon Steel: API 5L B/X42/X46/X52/X60/X65/X70 | Alloy & Low-Alloy Steel: ASTM A335 P1/P5/P9/P11/P22/P91, GB/T 8162/8163 | Others per customer specification
  • Standards: API 5L, ASTM A106, ASTM A53, ASTM A335, GB/T 8162/8163, EN10204

Production Flowchart

Seamless Steel Pipe Production Flowchart

Frequently Asked Questions about SMLS Pipe Factory

What manufacturing technologies does Xenith Steel use in its SMLS pipe factory?

Xenith Steel SMLS pipe factory uses six manufacturing technologies:

(1) PQF rolling mills for precise diameter control.

(2) MINI-MPM rolling mills for smaller batches.

(3) Rotary piercing for billet conversion.

(4) Stretch-reducing mills for final sizing.

(5) Heat treatment lines for mechanical properties.

(6) CNC pipe threading from SMS INNSE and MEER (Germany).

What seamless pipe specifications does Xenith Steel produce?

Xenith Steel produces seamless pipes with three key specifications:

(1) Outer diameter from 38mm to 530mm.

(2) Wall thickness from 2.5mm to 100mm.

(3) Length from 6,000mm to 12,500mm with customization available.

Materials include carbon steel, alloy steel, and low-alloy high-strength grades.

What international standards do Xenith Steel seamless pipes comply with?

Xenith Steel seamless pipes comply with four standard categories:

(1) API 5L for line pipe applications.

(2) ASTM A106 and ASTM A53 for carbon steel.

(3) ASTM A335 for alloy steel grades.

(4) GB/T 8162 and GB/T 8163 for Chinese national standards.

Full mill test certificates and third-party inspection reports provided with every shipment.

What is the annual production capacity of Xenith Steel SMLS pipe factory?

Xenith Steel SMLS pipe factory has an annual capacity of 1,000,000 tons with four production capabilities:

(1) Carbon steel seamless pipes per API 5L, ASTM A106, ASTM A53.

(2) Alloy steel seamless pipes per ASTM A335 P11/P22/P91.

(3) Low-alloy high-strength steel grades.

(4) Special-purpose pipes per customer specification.

The 300,000㎡ facility operates PQF and MINI-MPM rolling mills from SMS INNSE and MEER (Germany).

What quality inspections does Xenith Steel perform on seamless pipes?

Xenith Steel performs seven quality inspections on every seamless pipe:

(1) Ultrasonic testing for internal defects.

(2) Hydrostatic pressure testing for pressure integrity.

(3) Magnetic particle inspection for surface cracks.

(4) Radiographic testing for weld and material integrity.

(5) Chemical analysis for grade verification.

(6) Mechanical property testing for yield and tensile strength.

(7) Dimensional checks for OD, WT, and length compliance.

Can Xenith Steel produce seamless pipes for high-temperature and high-pressure applications?

Yes. Xenith Steel manufactures seamless pipes for high-pressure and high-temperature environments with three alloy steel grades:

(1) ASTM A335 P11 for moderate temperature service.

(2) ASTM A335 P22 for elevated temperature applications.

(3) ASTM A335 P91 for ultra-high temperature and pressure service.

These pipes serve power plants, petrochemical facilities, and high-pressure oil and gas transmission pipelines worldwide.