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.

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Seamless Line Pipe

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

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Welded Line Pipe

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

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Why ZC Steel Pipe

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API & ISO Certified

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

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Patented Premium Connections

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

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Global Export Experience

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

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Order-to-Make Flexibility

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

Technical Resources

OCTG

What Drives the Price of OCTG Casing and Tubing

The ranked drivers that set the price of OCTG casing and tubing — tonnage, grade, route, connection, coating, testing — and which levers a buyer controls.

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OCTG Purchase Specification: What a Mill Needs to Quote Casing and Tubing

The nine line items every OCTG RFQ needs for an accurate casing and tubing quote — grade, weight, connection, drift, service, and certification.

Read article → General

What Pipe for Carbon Capture? CO2 Transport and Injection Material Guide

Dry CO2 runs in carbon steel; free water needs dehydration or a CRA. Pipe material selection for CO2 transport and injection wells (CCUS), per DNV-RP-F104.

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