PIPE AND FITTING SPECIFICATIONS FOR
VESSELS UNDER U. S. COAST GUARD JURISDICTION
(APPLIES TO ALL PIPE & FITTINGS THROUGHOUT THE SYSTEM)
GENERAL
1.
ALL PIPE AND FITTINGS TO HAVE A MINIMUM BURSTING PRESSURE (NOT WOR KING PRESSURE) OF 6,000 LBS. P.S.I.
2.
THREADS ON ALL PIPES AND FITTINGS ARE TO BE TAPER THREADS CONFORMING TO A.S.A. SPECIFICATION B-2.
3.
THREADED CONNECTORS ARE PERMITTED ONLY ON SIZES UP TO AND INCLUDING 2” I.P.S. ABOVE 2” I.P.S. CONNECTIONS ARE TO BUTT-WELDED OR STL-
BRAZED.
PIPE (STEEL)
1.
BETWEEN CYLINDER AND STOP VALVES:
a)
PIPE IN SIZES UP TO AND INCLUDING 3/4” I.P.S IS TO BE STEEL, SEAMLESS. SCHEDULE 40-ASTM-A106 OR A53
b)
PIPE IN SIZES LARGER THAN 3/4” I.P.S. IS TO BE STEEL, SEAMLESS. SCHEDULE 90-ASTM-A106 OR A53
2.
BETWEEN STOP VALVES AND NOZZLES:
a)
PIPE IN SIZES UP TO AND INCLUDING 3-4” I.P.S. IS TO BE STEEL. SCHEDULE 40-ASTM-A106 OR A53.
b)
PIPE IN SIZES LARGER THAN 3/4” I.P.S. IS TO BE STEEL. SCHEDULE 60-ASTM-A106 OR A53.
3.
ALL PIPE IS TO BE HOT DIPPED GALVANIZED AND FREE OF SCALE.
FITTINGS (STEEL)
1.
BETWEEN CYLINDERS AND STOP VALVES:
a)
FITTINGS IN SIZES UP TO AND INCLUDING 2” I.P.S. ARE TO BE FORGED STEEL GALVANIZED 3000 LB. WOG. OR 300 LB. AAR MALL. GALV.
b)
FITTINGS LARGER THAN 2” I.P.S. ARE TO BE GALVANIZED STEEL BUTT-WELDED FITTINGS ASTM-A106, SCHEDULE 40, GRADE A OR B OR BRONZE
STL-BRAZE - 3000 LB. WOG. (AVAILABLE UP TO AND INCLUDING 2-1/2” I.P.S.)
2.
BETWEEN STOP VALVES AND NOZZLES:
a)
FITTINGS UP TO AND INCLUDING 3/4” I.P.S. ARE TO BE STANDARD WEIGHT MALLEABLE IRON GALVANIZED (150 LBS.)
b)
FITTINGS IN SIZES 1” I.P.S. THROUGH 2” I.P.S. ARE TO BE EXTRA HEAVY (300 LBS. AAR) MALLEABLE IRON GALVANIZED
c)
FITTINGS LARGER THAN 2” I.P.S. ARE TO BE GALVANIZED STEEL BUTT-WELDED FITTINGS ASTM-A105, SCHEDULE 40, GRADE A OR B, OR BRONZE
STL-BRAZE - 3000 LB. WOG (AVAILABLE UP TO AND INCLUDING 2-1/2” I.P.S.)
FLANGED FITTINGS
FLANGED FITTINGS IF USED ARE TO BE 1500 LB. FORGED STEEL, BUTT-WELDED OR 3000 I.B. WOG BRONZE SIL-BRAZE.
GASKETS FOR FLANGED FITTINGS
STAINLESS STEEL FLEXITALLIC GASKETS MANUFACTURED BY THE FLEXITALLIC GASKET CO. ARE RECOMMENDED, BUT OTHER SUITABLE HIGH PRESSURE
GASKET MATERIALS ARE PERMISSIBLE.
BUSHINGS
IF ODD SIZED REDUCING FITTINGS ARE NOT AVAILABLE, FLUSH STEEL OR HEX STEEL MAY BE USED. FLUSH BUSHINGS SHOULD NOT BE USED IN FITTINGS
LARGER THAN 2” I.P.S., NOR FOR A REDUCTION GREATER THAN TWO SIZES. ABOVE 2: I.P.S., AND FOR A REDUCTION GREATER THAN TWO SIZES USE HEX STEEL
BUSHINGS.
BRASS PIPE AND FITTINGS
(MAY BE USED ONLY BETWEEN STOP VALVES AND NOZZLES IN SIZES UP TO AND INCLUDING 1” I.P.S.)
1.
BRASS PIPE IS TO BE EXTRA HEAVY.
2.
BRONZE FITTINGS ARE TO BE EXTRA HEAVY.
APPROVED FITTINGS
1.
THE FOLLOWING FITTINGS HAVE BEEN FOUND TO BE SATISFACTORY:
STEEL AND MALLEABLE IRON
TEBS, ELLS, CROSSES AND COUPLINGS (SCREWED TYPE)
IN SIZES UP TO 3/4” I.P.S. INCLUSIVE - 130 LB. WSP BANDED MALLEABLE IRON GALVANIZED
(CRANE, FLAGG, GRABLER, WALWORTH,
IN SIZES 1” I.P.S. TO 2” I.P.S. INCLUSIVE - 300 LB. AAR MALLEABLE IRON GALVANIZED
MALLEABLE IRON FITTING COMPANY,
AND STOCKHAM)
UNIONS (SCREWED TYPE)
IN SIZES 1/2” I.P.S. TO 3/4” I.P.S. INCLUSIVE (BRONZE TO STEEL SEATS PREFERRED)
MALLEABLE IRON 130 LB. W.S.P. GALVANIZED
IN SIZES 1” I.P.S. TO 2” I.P.S. INCLUSIVE (BRONZE TO STEEL SEATS PREFERRED) - MALLEABLE IRON 300 LB. W.S.P. GALVANIZED
(FLAGG, STOCKHAM)
FORGED STEEL 3000 LB. WOG BLACK (CATAWIS6A)
TEES, ELBOWS, CROSSES (BUTT-WELDED TYPE)
IN SIZES OVER 2” I.P.S. (ASTM-A105. SCHEDULE 30, GRADE A OR B, STEEL GALVANIZED. (LADISH, WALWORTH, CRANE)
UNIONS (COMPANION FLANGES)
BUTT-WELDED. IN SIZES 2-1/2” THRU 6” I.P.S. - 1500 LB. FORGED STEEL GALVANIZED. (CRANE, WALWORTH, LADISH)
BRONZE FITTINGS
TEES, ELLS, CROSSES, UNIONS, AND COUPLINGS (SCREWED TYPE)
IN SIZES UP TO AND INCLUDING 1” I.P.S.
CRANE - EXTRA HEAVY BRONZE
WALWORTH - EXTRA HEAVY BRONZE
FLAGG - EXTRA HEAVY BRONZE
APPROVED PER COAST GUARD LETTER DATED OCT. 6, 1960
APPROVED PER COAST GUARD LETTER DATED MAR. 14, 1974
REV. 3 APPROVED PER U.S.C.G. LETTER DATED MAR. 30, 1979
