ZC Steel Pipe — OCTG & Line Pipe for Oil & Gas

What We Supply

OCTG — Casing & Tubing

API 5CT casing and tubing in grades N80, R95, L80, C90, T95, P110, C110, Q125. Premium connections available.

Premium Connections

Metal-to-metal seal premium connections — ZC-1 through ZC-6 series. Gas-tight, API 5C5 CAL IV qualified. Independent patents.

View specs →

Seamless Line Pipe

API 5L seamless line pipe in grades X52 through X80, PSL1 and PSL2. Sour service HIC qualification available.

View specs →

Welded Line Pipe

ERW, LSAW and SSAW welded line pipe in API 5L grades X52–X80 for onshore and offshore pipeline projects.

View specs →

View all products →

Why ZC Steel Pipe

🏭

API & ISO Certified

API 5CT, API 5L, ISO 11960 and ISO 3183 certified manufacturing. EN 10204 3.2 MTC on all orders.

🔩

Patented Premium Connections

Independent patents on ZC-1 through ZC-6 premium connection series. API 5C5 CAL IV gas-tight qualification.

🌍

Global Export Experience

Completed projects across Africa, the Middle East, South America and Southeast Asia. Third-party inspection available.

⚙️

Order-to-Make Flexibility

Non-standard grades, wall thicknesses and lengths available. Sour service, HPHT and CRA grades on request.

Technical Resources

general

Alloy Steel Pipe Grades: Chrome-Moly OCTG and Boiler Tube Guide

Chrome-moly alloy pipe grades — OCTG (13Cr, T95, C110) and boiler tube (T11, T22, T91) — grade selection for oil, gas, and power plant applications.

Read article → Line Pipe

API 5L Grade B Pipe: PSL1 and PSL2 Specifications

API 5L Grade B (L245) line pipe: PSL1 and PSL2 specifications, chemistry, Charpy toughness, and delivery conditions. Mill supplier for Africa and Middle East.

Read article → flanges-fittings

ASTM A234 WPB Pipe Fittings: Grades, Specifications and Supplier Guide

ASTM A234 carbon and alloy steel pipe fitting grades — WPB to WP91 chemistry, mechanical properties, temperature limits, and procurement guide. ZC fittings.

Read article →

View all articles →