Construction specifications.
Each pipeline company must assure that any new pipeline construction conforms to the requirements of ASME B31.4. The longitudinal seams of connecting pipe joints must be offset by at least two inches. In addition, the longitudinal seams must be located on the upper half of the pipe when laid in an open trench. Information about the ASME edition adopted and where to obtain it are set out in WAC
480-75-999, Adoption by reference.
[Statutory Authority: RCW
80.01.040,
80.04.060,
81.88.040. WSR 08-12-045 (Docket PL-070974, General Order R-548), § 480-75-450, filed 5/30/08, effective 6/30/08. Statutory Authority: RCW
80.01.040,
81.01.010,
81.88.060. WSR 07-09-001 (Docket PL-061026, General Order R-541), § 480-75-450, filed 4/4/07, effective 5/5/07. Statutory Authority: RCW
80.01.040 and
80.04.160. WSR 02-18-032 (Docket No. TO-000712, General Order No. R-500), § 480-75-450, filed 8/26/02, effective 9/26/02.]