The following materials are available for the casing: H-40, J-55, K-55, N-80, L-80, C-90, T-95, P-110, Q-125 that meet  API 5CT standards. These include seamless and welded casing for Oil and gas transportation. Do you know the Difference between APT 5CT N-80 Tubing and API 5CT L-80 tubing?

According to API 5CT, bushings are available in the following grades to ensure that each bushing grade is suitable for its intended application:

Commonly used casings: H, J, K, M, N and R grades;

Corrosion-resistant casing: Class C, Class L and Class T;

Deep well casing: P grade and Q grade.

API N80Q Pipe is a general pipe manufactured using the quenching and tempering process in accordance with API specification 5CT. Can be divided into API 5CT N80-1 and API 5CT N80-Q. Both have the same tensile properties but different properties. Delivery conditions and effects on performance.

5CT grade N80-1, in the normalized delivery state or the final rolling temperature is higher than the critical temperature Ar3 and the tension is reduced after air cooling, can be used for hot rolling and normalizing without impact and non-destructive testing; 5CT grade N80Q must be quenched and tempered (quenched and tempered) ) Heat treatment and impact should comply with the regulations of API 5CT, and non-destructive inspection should be carried out.

API 5CT grade L80 tubing is commonly used in oil wells in sour (hydrogen sulfide) environments. It can be divided into 5CT grade L80-1, 5CT grade L80-9Cr and 5CT grade L80-13Cr. Their mechanical properties and delivery condition are identical. The differences are in usage, difficulty of production and price. 5CT L80-1 pipe is an ordinary type, while 5CT L80-9Cr and L80-13Cr are highly corrosion-resistant oil pipes, which are difficult to produce and expensive, and are usually used in heavily corroded wells.

API N80 Type 1 is a lower cost alternative to standard hardened and tempered API N80 (wall thickness less than 0.500 inches). Charpy V-notch impact test absorbed energy results comply with API SR16, which is lower than quenched and tempered N80. Want to buy APT 5CT N-80 and API 5CT L-80 bushings? Contact Cangzhou Zhongshun  steel Pipe trade Co., Ltd. !

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