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Cast Iron Threaded Pipe Fittings - Working Pressures

Maximum working pressures for cast iron threaded pipe fittings according ANSI B16.4

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Maximum working pressures of cast iron pipe fittings - threaded fittings according ANSI B16.4:

Maximum Working Pressure (psig)

Pressure Class
-20 to 150 175 400
200 165 370
250 150 340
300 140 310
350 125 280
400 - 250
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