1.1 This International Standard specifies the technical delivery conditions for steel pipes (casing, tubing and
pup joints), coupling stock, coupling material and accessory material and establishes requirements for three
Product Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of this
International Standard. The requirements that define different levels of standard technical requirements for
PSL-2 and PSL-3, for all Grades except H-40, L-80 9Cr and C110, are contained in Annex H.
For pipes covered by this International Standard, the sizes, masses and wall thicknesses as well as grades
and applicable end-finishes are listed in Tables C.1 and C.2 and Tables E.1 and E.2.
By agreement between the purchaser and manufacturer, this International Standard can also be applied to
other plain-end pipe sizes and wall thicknesses.
This International Standard is applicable to the following connections in accordance with API Spec 5B:
- short round thread casing (SC);
- long round thread casing (LC);
- buttress thread casing (BC);
- non-upset tubing (NU);
- external upset tubing (EU);
- integral tubing connections (IJ).
For such connections, this International Standard specifies the technical delivery conditions for couplings and
thread protection. Supplementary requirements that can optionally be agreed for enhanced leak resistance
connections (LC) are given in A.11 SR22.
This International Standard can also be applied to tubulars with connections not covered by ISO/API
standards.
1.2 The four groups of products to which this International Standard is applicable include the following
grades of pipe:
- Group 1: All casing and tubing in Grades H, J, K, N and R;
- Group 2: All casing and tubing in Grades C, L, M and T;
- Group 3: All casing and tubing in Grade P;
- Group 4: All casing in Grade Q.
1.3 Casing sizes larger than Label 1: 4-1/2 but smaller than Label 1: 10-3/4 can be specified by the
purchaser to be used in tubing service, see Tables C.1, C.23, C.27 and C.28 or Tables E.1, E.23, E.27 and
E.28.
1.4 Supplementary requirements that can optionally be agreed between purchaser and manufacturer for
non-destructive examination, fully machined coupling blanks, upset casing, electric-welded casing, tubing and
pup joints, impact testing, seal ring couplings, test certificates, tensile testing and sulfide stress cracking
testing are given in Annex A.
1.5 This International Standard is not applicable to threading requirements.
BS EN ISO 11960:2011 history
2021BS EN ISO 11960:2021 Petroleum and natural gas industries. Steel pipes for use as casing or tubing for wells
2014BS EN ISO 11960:2014 Petroleum and natural gas industries. Steel pipes for use as casing or tubing for wells
2011BS EN ISO 11960:2011 Petroleum and natural gas industries. Steel pipes for use as casing or tubing for wells
2005BS EN ISO 11960:2004 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells