Western Australian Consolidated Regulations Western Australian Consolidated Regulations Except as the Minister
otherwise pursuant to the Act directs, a pipeline laid in internal waters
other than rivers or creeks —
(a)
shall be of steel and made by the seamless or double submerged arc process;
(b)
shall be buried below the bed of those waters to a depth of 4 feet;
(c)
shall, with respect to all field welds, be radiographed and evaluated in
accordance with the relevant provisions of the American Petroleum Institute
Standard 1104 “Standard for Field Welding of Pipelines” 11th
Edition, January, 1968, and all welds thereby found to be defective shall be
repaired to comply with those provisions or cut out; and
(d)
shall, whatever the contents of the pipeline, have a negative buoyancy with
respect to the water or bottom soil in which it is laid.