Hawaii Administrative Rules › Title 6 - DEPARTMENT OF BUDGET AND FINANCE › Division - PUBLIC UTILITIES COMMISSION › Chapter 77 - TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE; MINIMUM SAFETY STANDARDS › Appendix B - Qualification of Pipe

Current through June, 2024
I. Listed Pipe
				Specifications. Numbers in parentheses indicate applicable editions.
API 5L--Steel pipe (1988).
ASTM A53--Steel pipe (1979).
ASTM A106--Steel pipe (1979).
ASTM A333--Steel pipe (1979).
ASTM A381--Steel pipe (1979).
ASTM Specification A671--Steel pipe (1977).
ASTM Specification A672--Steel pipe (1979).
ASTM Specification A691--Steel pipe (1979).
ASTM D2513--Thermoplastic pipe and tubing (1987).
ASTM D2517--Thermosetting plastic pipe and tubing
				  (1973).
II. Steel pipe of
				unknown or unlisted specification.
A. Bending
				Properties. For pipe 2 inches or less in diameter, a length of pipe must be
				cold bent through at least 90 degrees around a cylindrical mandrel that has a
				diameter 12 times the diameter of the pipe, without developing cracks at any
				portion and without opening the longitudinal weld.
For pipe more than 2 inches in diameter, the pipe must meet
				  the requirements of the flattening tests set forth in ASTM A53, except that the
				  number of tests must be at least equal to the minimum required in paragraph
				  ll-D of this appendix to determine yield strength.
B. Weldability. A girth weld must be made in
				the pipe by a welder who is qualified under subchapter 7 of this part. The weld
				must be made under the most severe conditions under which welding will be
				allowed in the field and by means of the same procedure that will be used in
				the field. On pipe more than 4 inches in diameter, at least one test weld must
				be made for each 100 lengths of pipe. On pipe 4 inches or less in diameter, at
				least one test weld must be made for each 400 lengths of pipe. The weld must be
				tested in accordance with API Standard 1104. If the requirements of API
				Standard 1104 cannot be met, weldability may be established by making chemical
				tests for carbon and manganese, and proceeding in accordance with section IX of
				the ASME Boiler and Pressure Vessel Code. The same number of chemical tests
				must be made as are required for testing a girth weld.
C. Inspection. The pipe must be clean enough
				to permit adequate inspection. It must be visually inspected to ensure that it
				is reasonably round and straight and there are no defects which might impair
				the strength or tightness of the pipe.
D. Tensile Properties. If the tensile
				properties of the pipe are not known, the minimum yield strength may be taken
				as 24,000 p.s.i. or less, or the tensile properties may be established by
				performing tensile tests as set forth in API Specification 5L. All test
				specimens shall be selected at random and the following number of tests must be
				performed:
NUMBER OF TENSILE TESTS - ALL SIZES
10 lengths or less.......
| 1 set of tests for each
| length.
11 to 100 lengths........
| 1 set of tests for each
| 5 lengths, but not less
| than 10 tests.
Over 100 lengths.........
| 1 set of tests for each
| 10 lengths, but not | less than 20 tests.
If the yield-tensile ratio, based on the properties
				  determined by those tests, exceeds 0.85, the pipe may be used only as provided
				  in section 6-77-21(c).