Section 341.46. Power piping.

 

(1)   General. Power piping shall be installed in accordance with ASME B31.1. The use of slip-on flanges shall be limited in applications to no higher than Class 300 primary pressure service rating. Slip-on flanges shall be installed with double fillet welds in accordance with ASME B31.1.

(2)   Boiler external piping. Boiler external piping within the scope of section I of the ASME code shall be installed in accordance with ASME B31.1.

(3)   Application. This section applies to new systems as well as all replacements, modifications, and alterations to existing systems.

Cr. Register, February, 1988, No. 386 , eff. 3-1-88; r. and recr. Register, February, 1990, No. 410 , eff. 3-1-90; am. (1) and (2), Register, February, 2000, No. 530 , eff. 3-1-00; CR 11-047 : am. (1), (2) Register May 2012 No. 677 , eff. 6-1-12.