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Style R Gasket Suitable for Flange Standards

Pipe Sizes & Pressure Ratings for Style R Gaskets in Flange Application

Ring NumberPressure Classes
ASME B16.5API 6BASME B16.47 Series A
150300-60090015002500720-960(1)200030005000150300-600900
R-11...1/2..............................
R-12......1/21/2........................
R-13...3/4......1/2.....................
R-14......3/43/4........................
R-151.................................
R-16...1113/41111.........
R-171-1/4.................................
R-18...1-1/41-1/41-1/411-1/41-1/41-1/41-1/4.........
R-191-1/2.................................
R-20...1-1/21-1/21-1/2...1-1/21-1/21-1/21-1/2.........
R-21............1-1/4.....................
R-222.................................
R-23...2......1-1/222...............
R-24......22.........22.........
R-252-1/2.................................
R-26...2-1/2......22-1/22-1/2...............
R-27......2-1/22-1/2......2-1/22-1/2............
R-28............2-1/2.....................
R-293.................................
R-30(2)...3..............................
R-31...33......333............
R-32............3.....................
R-333-1/2.................................
R-34...3-1/2..............................
R-35.........3............3.........
R-364.................................
R-37...44......4443-1/2.........
R-38............4.....................
R-39.........4............4.........
R-405.................................
R-41...55......555............
R-42............5.....................
R-436.................................
R-44.........5............5.........
R-45...66......666............
R-46.........6............6.........
R-47............6.....................
R-488.................................
R-49...88......888............
R-50.........8............8.........
R-51............8.....................
R-5210.................................
R-53...1010......101010............
R-54.........10............10.........
R-55............10.....................
R-5612.................................
R-57...1212......121212............
R-58.........12........................
Ring NumberPressure Classes
ASME B16.5API 6BASME B16.47 Series A
150300-60090015002500720-960(1)2000300010000(1)150300-600900
R-5914.................................
R-60.........12........................
R-61...14.........141414............
R-62......14...........................
R-63.........14........................
R-6416.................................
R-65...16.........1616...............
R-66......16............16............
R-67.........16........................
R-6818.................................
R-69...18.........1818...............
R-70......18............18............
R-71.........18........................
R-7220.................................
R-73...20.........2020...............
R-74......20............20............
R-75.........20........................
R-7624.................................
R-77...24..............................
R-78......24...........................
R-79.........24........................
R-80....................................
R-81....................................
R-82........................1.........
R-84........................1-1/2.........
R-85........................2.........
R-86........................2-1/2.........
R-87........................3.........
R-88........................4.........
R-89........................3-1/2.........
R-90........................5.........
R-91........................10.........
R-92....................................
R-93..............................26...
R-94..............................28...
R-95..............................30...
R-96..............................32...
R-97..............................34...
R-98..............................36...
R-99..................88............
R-100.................................26
R-101.................................28
R-102.................................30
R-103.................................32
R-104.................................34
R-105.................................36

GENERAL NOTE: End flanges to API 6D and API 600 use gaskets for equivalent pipe size under ASME B16.5 or ASME B16.47 series A.
NOTES:
(1) Class 720, 960, and 10000 flanges to API 6B are obsolete. Data are for information only.
(2) R-30 is for lapped joint only.

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