WAC 296-104-100   Inspection -- How often must boilers and unfired pressure vessels be inspected?  In accordance with RCW 70.79.080, 70.79.090, and 70.79.240 the following inspection requirements shall apply:

     (1) Power boilers shall be inspected:

     (a) Externally while under pressure - Annually.

     (b) Internally and externally while not under pressure - Annually, except as noted in the following paragraph.

     A power boiler in a national board accredited owner-user inspection program may have the internal inspection intervals extended by the owner-user inspection organization to five years maximum under the following conditions:

     (i) The boiler water treatment and specific chemical limits are prescribed and monitored by an individual or company that specializes in the water treatment field;

     (ii) Nondestructive examination (NDE) is performed along with the internal inspections;

     (iii) The boiler is monitored within a manned operating facility;

     (iv) Inspection, maintenance, and water treatment records are maintained;

     (v) There is sufficient inspection history for the boiler or a boiler in similar service to justify the increase in the inspection interval; and

     (vi) This provision shall not apply to a black liquor recovery boiler or any boiler with an unsuitable corrosion rate, remaining life, and/or repair history.

     (2) Organic vapor boilers shall be inspected:

     (a) Externally while under pressure - Annually.

     (b) Internally and externally while not under pressure - Biennially.

     (3) Low pressure heating boilers shall be inspected:

     (a) Externally while in operation and under pressure - Biennially.

     (b) Where construction permits, internally while not under pressure. Also, as a minimum, an internal of their low water fuel cutoff(s) must be completed, where construction permits - Biennially.

     (4) Hot water heaters shall be inspected:

     (a) Externally - Biennially.

     (b) Internally - None required.

     (5) Unfired pressure vessels shall be inspected:

     (a) Externally - Biennially.

     (b) Internally:

     (i) When subject to corrosion and construction permits - Biennially. Vessels in an owner-user inspection program may follow intervals established by the NBIC or API-510 ninth edition with addenda, provided nondestructive examination (NDE) is performed at the biennial external inspection.

     (ii) Pulp or paper dryer rolls may be inspected on a five-year basis in accordance with TAPPI TIP 0402-16 2001 edition, provided the owner has established a written inspection program accepted by the inspector that meets the minimum requirements of TAPPI TIP 0402-16 2001 edition.

     (iii) Vessels not subject to corrosion do not require an internal.



[Statutory Authority: RCW 70.79.030, 70.79.040, 70.79.150, 70.79.290, 70.79.330, and 70.79.350. 08-12-015, § 296-104-100, filed 5/27/08, effective 6/30/08. Statutory Authority: Chapter 70.79 RCW. 04-21-069, § 296-104-100, 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. 04-01-194, § 296-104-100, filed 12/24/03, effective 1/24/04; 01-24-061, § 296-104-100, filed 11/30/01, effective 12/31/01. Statutory Authority: RCW 70.79.030 and 70.79.040. 99-22-026, § 296-104-100, filed 10/26/99, effective 11/26/99; 98-22-024, § 296-104-100, filed 10/28/98, effective 11/28/98; 95-19-058, § 296-104-100, filed 9/15/95, effective 10/16/95. Statutory Authority: RCW 70.79.040. 94-21-002, § 296-104-100, filed 10/5/94, effective 11/5/94; Part III, § 1, filed 3/23/60.]