Casing and Tubing

Casing and Tubing

All the oil and gas lines (including the underground injecting material of any formation) need to be cased with material of high strength. Casing and tubing are the important aspects of any well construction.

Casing and tubing are key portions of OCTG. Casings are those pipes supporting the wall of oil and gas well. It is mainly divided in 3 major categories- the surface, protection and production casing. Tubing is a distinct pipe, installed in production casing after well cementing to allow the oil and gases flow to the ground.

Size Range

OD:2 3/8'' - 21''  WT: 0.17''-2.00''


J55,K55,N80,L80,P110, C90, T95, Q125 ,9Cr,13Cr,28CRA.


STC (Short round Thread Casing), LTC (Long round Thread Casing), BTC (Buttress Thread Casing), Premium connections.

Product Level Specifications

PSL-1 PSL-2 PSL-3 Supplementary Requirement – Only Upon Request

Operative Standard

API 5CT 9th Edition & ISO9001 quality system certification


Externally Coated with Anti-Rust Mill Varnish; Plastic, Metal or Composite Pin and Box Protectors.

In Business since over 50 years, City Cat International is on the forefront of pipe and pipe fittings innovation, partnering with our clients to build new, high customized solutions to move the oil and gas industry forward. We hold ISO 9001 registration for our operations, which confirms our rigorous quality management system. As an industry leader in supply and export, City Cat International is one of the top groups in the nation of offering products of high range and excellent quality as per API 5CT specifications. City Cat group is driven only towards client’s satisfaction and delivering quality products to clients worldwide.

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