# 11.2 Nominal masses Nominal mass is used in connection with pipe having end finish such as threads and couplings, upset and threaded ends, upset ends,

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Part B - Justification: L j is not known for historical weights of casing. Thus, using equation 74 and assuming 20 ft often results in an incorrect value of e m. Direct calculation of e m is the proper and accurate method and is covered in clauses 11.5.2, 11.6.2, and 11.7.2 Part B – Proposed Change: Delete equation (74) and its description.

Part C – Proposed Change: Replace “-” with “for” in the clause titles for threaded and coupled pipe. for upset and threaded pipe for upset pipe. Part C – Justification: Prevents potential confusion of the hyphen with a minus sign.

Part D – Proposed Change: add a sentence to the 1 st paragraph of 11.5.1 and reword L j definition to cover casing and tubing is taken as 9.14 m (30 ft) for casing and 6.10 m (20 ft) for tubing. For calculation of new nominal casing masses only the buttress connection is used. Part D - Justification : All threads use the same nominal mass / ft but no guidance was provided as to which thread type is used to set the nominal mass / ft.

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