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

heat-exchanger

Extruded vs Welded vs Crimped Fin Tubes: Manufacturing Comparison

Compare extruded, HF-welded, and crimped fin tube manufacturing — bond type, max service temperature, fouling resistance, and when to specify each.

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Fin Spacing and Heat Exchanger Efficiency: Engineering Guide

Engineering guide to fin pitch selection — how fin spacing affects heat transfer, air-side pressure drop, fouling tolerance, and fin surface efficiency.

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Finned Tubes: Types, Manufacturing, and Heat Exchanger Applications

Complete guide to finned tubes — extruded, welded, and crimped types, base tube and fin materials, API 661 dimensions, and heat exchanger applications.

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