Coupling stock is the seamless pipe used for producing coupling of casing and tubing. Coupling Stock is a seamless thick-wall tubular product used in the manufacture of coupling blanks. Coupling stock has its own very important purpose in oil industry.
Coupling stock has many different steel grade but the main steel grade are as the follows：As per API 5 CT SPEC:J 55\K 55\N 80 Q\L 80-1\L 80-9 Cr\ L 80-13 Cr\T 95\C 110 and so on.Sour service grade such as CB 80 S~CB 110 SS. The standard of Coupling Stock is according to API 5 CT 9th. And the characteristic of coupling stock is rolled by KPE mill,with good dimension control,high qualified production,stable mechanical and impact property.Available grades/material: carbon alloy, all API 5 CT and proprietary grades in numerous wall thickness. The range of Coupling stock is OD is 52.2 mm~244.48 mm, WT is 4.2 mm~22 mm.
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