ISO 11960:2014
Petroleum and natural gas industries — Steel pipes for use as casing or tubing for wells
Reference number
ISO 11960:2014
Edition 5
ISO 11960:2014
Withdrawn (Edition 5, 2014)


ISO 11960:2014 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 ISO 11960:2014. 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.

By agreement between the purchaser and manufacturer, ISO 11960:2014 can also be applied to other plain-end pipe sizes and wall thicknesses.

ISO 11960:2014 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 (IJ).

ISO 11960:2014 can also be applied to tubulars with connections not covered by ISO/API standards.

The four groups of products to which ISO 11960:2014 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.

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.

General information

  •  : Withdrawn
     : 2014-01
    : Withdrawal of International Standard [95.99]
  •  : 5
     : 264
  • ISO/TC 67/SC 5
  • RSS updates

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)