Steel pipes with spiral seam for the gas industry

Spiral welded pipes are manufactured by rolling steel plate into a spiral shape and joining the edges by shielded welding from the inside and outside.

This advanced technology ensures safety, durability and reliability in the most demanding applications.

Technical parameters:

• Diameter range: 406.4 mm – 2540 mm
• Wall thickness: 4 mm – 25 mm
• Length: standard up to 18 metres
• Ends: bevelled, socketed or flanged

Applications in the gas industry

• Natural gas transmission pipelines – long-distance gas transportation
• High-pressure distribution networks – gas supply to distribution nodes and industrial consumers
• Interconnector pipelines – cross-border gas pipelines and integration of European networks
• LNG infrastructure – terminals and pipelines connected to the transmission system

Steel grades

• L360ME – L485ME
• X52ME – X70ME
• and
• L360NE – L415NE
• X52NE – X60NE

Certificates and quality standards

Spiral welded pipes comply with stringent international standards:

• EN 10219 – Structural steel pipes
• API 5L – Line pipes for the oil and gas industry
• ISO 9001 – Quality management system
• EN 10224 – Pipes for the conveyance of aqueous liquids
• ISO 3183 – Steel pipes for the oil and gas industry

Anti-corrosion protection

Internal coatings:

Internal epoxy coating – specifically designed for gas pipelines

• Reduces the roughness of the internal surface
• Facilitates gas flow and increases transmission efficiency
• Temperature resistance up to 120°C

External coatings:

3LPE coating (Three-Layer Polyethylene)

• Three-layer system: FBE + adhesive + polyethylene
• Maximum corrosion protection

3LPP coating (Three-Layer Polypropylene)

• Three-layer system: FBE + adhesive + polypropylene
• High mechanical and thermal resistance
• Designed for operation at elevated temperatures
• Effective corrosion protection in demanding operating conditions

Coating thickness up to 9 mm

Quality control

Each pipe undergoes rigorous testing:

• Non-destructive testing (NDT): ultrasonic testing, radiographic testing, magnetic particle testing
• Hydrostatic pressure testing
• Dimensional inspection and coating thickness measurement
• Full documentation and certification

Advantages of spiral welded pipes

Cost efficiency – optimal material utilisation and competitive pricing
High strength – excellent rigidity and pressure resistance
Production flexibility – wide range of dimensions and custom manufacturing
Long service life – over 50 years with minimal maintenance
Safety – compliance with the highest international standards

Many years of industry experience

Cooperation with renowned European manufacturers

Competitive prices and timely deliveries

Technical support