API 5L/ASTM A53 X42/X52 Welded Steel Pipe for Oil & Gas Transmission

• Customization: Available
• Application: Cast Iron, Chemical Processing, Construction, Oil and Gas, Water Supply
• Pipe Diameter: as Per Client′s Design
• Model NO.: API 5L/ASTM A53 X42/X52 Welded Steel Pipe
• Pipe Length: as Per Client′s Design
• Surface Finish: as Per Products
• Steel Grade: X42 X52 X56 X60 X70
• Size: 1/4"-4"(Customized)
• Process: Polished
• Condition: Hot Finished/Cold Finished
• Length: as Per Client′s Design
• End: Plain End/Bevel End
• Usage: Heat Transfer
• Test: BV, SGS Is Available
• Stock: Size Can Customized
• Processing: Customized
• Thickness: 1-150mm
• Used: Factory, Decoration, Food
• Manufacturing: Welded Tubes (ERW Process)
• Packing: Standard Export Packing
• Delivery Time: 10-30 Working Days
• Transport Package: Woven Bag/Wooden Case
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10000 Ton/Year

Product Description

Product Description

Standard & Product

• API 5L Compliance:
  • Meets American Petroleum Institute (API) Specification 5L for pipeline steel, covering grades from PS1 (basic) to PS2 (high-performance).
• Spiral Welded Pipe Piles:
  • Manufactured by helically winding steel plates and welding the spiral seam, ideal for large outer diameter (OD) pipelines (24"-120", 609.6-3048 mm).
• Key Applications:
  • Onshore/offshore oil & gas transmission, water distribution, and industrial fluid transport.

 

Manufacturing Process

1. Plate Preparation:
   • Steel plates (ASTM A572/A516) cut to width, edges beveled for welding.
2. Spiral Winding:
   • Plate fed into a mill, formed into a helix around a mandrel; welding parameters (current, speed) controlled for seam integrity.
3. Welding Technology:
   • Submerged Arc Welding (SAW) for double-sided seams; optional NDT (UT/RT) for PS2 grades.
4. Post-Weld Treatment:
   • Straightening, cutting to length, and surface coating (fusion-bonded epoxy, 3PE) for corrosion protection.

 

Material Grades & Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)	Application Notes
X52 (PS1)	360	450-585	≥22	General onshore pipelines
X65 (PS2)	448	515-655	≥20	High-pressure offshore systems
X70 (PS2)	483	530-655	≥18	Arctic or deepwater environments

 

Installation & Construction Methods

• Pipe Laying Techniques:
  • S-Shape Lay (Onshore): Used for hilly terrain, requiring bend radii ≥30D (D=OD).
  • J-Lay/Reel Lay (Offshore): J-lay for deepwater (≥1000 m), reel lay for shallow water (<300 m).
• Jointing Methods:
  • Field welding (SAW/CRC-Evans machines) with post-weld heat treatment (PWHT) for X70+.
  • Mechanical couplings  for emergency repairs or non-weld zones.

Comparison: Spiral vs. ERW/LSAW Pipe for Large OD

Parameter	Spiral Welded Pipe	ERW (Electric Resistance Welded)	LSAW (Longitudinal Submerged Arc Welded)
Manufacturing Cost	Lower (helical welding efficient for large OD)	Higher for OD >48"	Highest (longitudinal welds require wider plates)
Weld Seam Orientation	Helical (distributes stress evenly)	Longitudinal (vulnerable to circumferential stress)	Longitudinal (high strength for critical apps)
Application Suitability	Medium/high-pressure pipelines, large spans	Low-pressure, small OD (<24")	High-pressure, critical infrastructure (LNG, cross-country)

 

 

Detailed Photos

 

 

Processing of Production

 

Certifications