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 Washington Administrative Code (Last Updated: November 23, 2016)
 Title 296. Labor and Industries, Department of
 Chapter 296-104. Board of boiler rules—Substantive.

  Section 296-104-405. Existing installation—How can the maximum allowable working pressure be established for nonstandard boilers or unfired pressure vessels?  

Latest version.
  • The maximum allowable working pressure MAWP of cylindrical components under internal pressure shall be established as follows:
    (1) For nonstandard steel low pressure steam heating boilers the MAWP shall be computed from the formula in subsection (5) of this section not exceeding 15 psi steam.
    (2) For nonstandard steel low pressure water heating boilers the MAWP shall be computed from the formula in subsection (5) of this section not exceeding 30 psi.
    (3) For nonstandard cast iron low pressure steam heating boilers the MAWP shall not exceed 15 psi steam.
    (4) For nonstandard cast iron low pressure water heating boilers the MAWP shall not exceed 30 psi.
    (5) For boilers and unfired pressure vessels not listed above, where the original code of construction is unknown, the following formula will be used.
    [Statutory Authority: Chapter 70.79 RCW. WSR 04-21-069, § 296-104-405, filed 10/19/04, effective 1/1/05. Statutory Authority: RCW 70.79.030, 70.79.040, 70.79.150, 70.79.290, 70.79.330, 70.79.350, and chapter 70.79 RCW. WSR 04-01-194, § 296-104-405, filed 12/24/03, effective 1/24/04. Statutory Authority: RCW 70.79.030 and 70.79.040. WSR 98-22-024, § 296-104-405, filed 10/28/98, effective 11/28/98; WSR 97-20-109, § 296-104-405, filed 9/30/97, effective 10/31/97; Part VI, § 2, filed 3/23/60.]
Chapter 70.79 RCW. WSR 04-21-069, § 296-104-405, filed 10/19/04, effective 1/1/05. Statutory Authority: RCW 70.79.030, 70.79.040, 70.79.150, 70.79.290, 70.79.330, 70.79.350, and chapter 70.79 RCW. WSR 04-01-194, § 296-104-405, filed 12/24/03, effective 1/24/04. Statutory Authority: RCW 70.79.030 and 70.79.040. WSR 98-22-024, § 296-104-405, filed 10/28/98, effective 11/28/98; WSR 97-20-109, § 296-104-405, filed 9/30/97, effective 10/31/97; Part VI, § 2, filed 3/23/60.