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Emergency shut-off crimp for 3/4"nps sch80 A106B pipe

Emergency shut-off crimp for 3/4"nps sch80 A106B pipe

Emergency shut-off crimp for 3/4"nps sch80 A106B pipe

(OP)
thread330-16741: Crimping Reformer Furnace Tubes

I am looking for equipment and expertise to crimp a 3/4"nps sch80 A106B pipe pressurized with stagnant water at 1200 psig and 500 degF.  It is an inter-gate pressure equalizing line on a closed gate valve that has a passing body/bonnet gasket joint.  I have been advised that two partial crimps with sealant injected between is recommended.  Is a complete crimp without cracking not possible for this material?

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