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CLOSURE REQUIREMENTS FOR VARIOUS IBC'S
Per 49 CFR 178.2(c)(1)(ii), the below listed closure and gasket information
should be followed:
Metal 31A and 31B Closure Descriptions
2” and 3” threaded
fittings with allgasket materials except Teflon
|
3/8 rotation beyond contact or torque
to 30ft lbs. |
2” and 3” threaded
fittings with Teflon gasket |
1/8 rotation beyond solid contact or
torque to 30ft lbs. |
22” drum rings
with multiseal gasket |
Seat the ring by
striking with mallet around circumference of ring. Start 5/8” bolt and tighten
with 5/8” bolt again repeating until bolt tightening resistance
does not change. (NOTE: The ring ends should be approximately
3/8” apart and must not meet.) |
Rotationally Molded 31H2 and 31HA1 Closure Descriptions
6” cap, all
gasket material |
1/8 – 1/16
rotation beyond contact |
2” NPS (NPT)
threaded bung plugs, pressure/vacuum relief vents |
3/8 – 1/2
rotation beyond contact |
All bottom drain valves |
(NOTE: Not to be screwed in until
0 – 3 threads remain visible.) The exterior compression
clamp should be tightened until it cannot be rotated around the
tabulation. A leak test per 49 CFR 178.813 is required after
valve installation. |
Blowmolded 31HA1, 31HG1 and 31HH1 Closure Descriptions
6” cap, all
gasket material |
Rotation beyond contact or torque to
55ft lbs. |
2” NPS (NPT)
threaded bung plugs, pressure/vacuum relief vents |
3/8 – 1/2
rotation beyond contact or torque to 55ft lbs. |
Valve nut |
1/8 rotation beyond contact or torque
to 55ft lbs. |

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