Line Pipe and Process Pipe

Line Pipe and Process Pipe

Pipes, iron or steel, for oil and gas pipeline
Pipes, iron or steel, outer diameter≧406.4mm
Other steel pipeline pipes, outer diameter＞406.4mm
Stainless steel pipes for oil and gas pipeline, 215.9mm≤outer diameter≤406.4mm
Other steel pipeline pipes, 215.9mm≤outer diameter≤406.4mm
Inquiry

We supply full-range line pipes of superior quality, including those of high strength, high toughness, homogeneous material & corrosion resistance, for various services such as onshore, offshore, shallow water and deep water, non-sour & sour, high-temperature steam services.

Seamless Line Pipe for Onshore & Offshore/Subsea Service
 
We supply both seamless (SMLS) and ERW (HFI/HFW) line pipes.
SMLS: O.D. from 2” to 28”, W.T. from 4.0mm to 65.0mm
ERW: O.D. from 5” to 26”, W.T. from 3.2mm to 22.2mm
 
We supply the highest grades seamless line pipe include:
– API X100Q for oil, gas, water & slurry services;
– X70QS for sour services;
– DNV 485 SFPDU under DNV-OS-F101 specification for subsea applications.
 
Standard Grade & Application

Grade Availability

Dimension tolerance
 
To meet strict dimensional tolerances for offshore/subsea services, We can supply products to API, ISO, DNV standards, specifications of contractors, clients and project-specific. For references, dimensional tolerances listed in the following tables are for standard sizes of pipes. Stricter tolerances can be guaranteed based on specific agreement with customer.
 
Diameter and Out of roundness tolerances for offshore/Subsea line pipe

Wall thickness, Straightness and length tolerances.

Stricter tolerances can be guaranteed based on specific agreement with customer.

Mechanical Properties (PSL 2, API Spec 5L/ ISO 3183)

 

Onshore Service

Note:(1) For Grade L690Q or X100Q, Rp0.2 shall be applied.

Note:(1)For Grade L690QO or X100QO, Rp0.2 shall be applied. The detail value can according to the order required.

Onshore and Offshore/Subsea for Sour Services

Sour Service Application

Resists Hydrogen Including Cracking (HIC) and Sulphide Stress Corrosion Cracking (SSCC). The HIC test has a stringent criteria of 5% Crack Length Ratio (CLR) and 3% Crack Thickness Ratio (CTR).  The product is based on NACE MR 0175/ISO 15156 to evaluate the properties of corrosion resistance.

 
Subsea Reeling Linepipe
Reeling lay is a rapid and efficient method to lay the linepipe for offshore or subsea project.
This laying method requires the pipe body shall have excellent mechanical properties, weldability, exact dimension,and corrosion resistance performance (if required).
Seamless Linepipe for High Temperature Steam Service
 
Reference Standards
CSA Z245.1 Steel Line Pipe
CSA Z662 Oil and Gas Pipeline Systems

Product Chemical Analysis (max. wt%)

Tensile test

Impact test

Vickers hardness test(HV10)