Tubing is used as a fluid or liquid injection pipe.Usually pipe OD ≤ 2-1/16"（52.4mm）we called small-sizes tubing, which is mainly used for water injection, oil recovery and oil gas recovery.

Main types

(1) API: NU (Non-upset with coupling); EU (External upset with coupling); IJ (integral joint without Coupling)

（2）Non-API: CB-IJ (Changbao extreme-line without coupling); CB-FJ (Changbao extreme-line without coupling with gas sealed), etc.

(3) Grade:J55/N80/L80/P110,etc.

Standards

API  SPEC  5CT

API  SPEC  5B

Product Features 

Ranking of joint OD size:EU＞NU＞IJ＞CB-IJ＞CB-FJ；

Ranking of joint ID size:CB-IJ=EU=NU＞CB-FJ＞IJ；

Ranking of joint connection strength:EU＞IJ＞CB-IJ＞NU＞CB-FJ；

(4) The performance of product depends on the size of the pipe body (OD, WT), Grade, etc.