NPT螺纹检查知识培训**定义:NPT::\飞机\航空等高精度高密封行业.*相关标准:-PipeThreads,-*3/8-18NPTorNPTFNominalSize(inch)ThreadsPerInchThreadSymbol*60°*InternalExternalL1L3L2*NPT*PipeThreadGauging-NPTNPTL1PlugGaugeInternalL1InternalNPTrequirestheuseofaL1NPTPlugGaugeThesteponthegaugemustbeflush,±1turnatthefaceofthefittingFlush“BasicSize”L1*PipeThreadGauging-NPTMinus1Turn“MinimumSize”MinimumSizeConditionPitchDiameterisatit’ssmallestL1InternalNPTL1PlugGauge*NPTL1PlugGaugeInternalL1InternalPipeThreadGauging-NPTMaximumSizeConditionPitchDiameterisatit’slargestPlus1Turn“MaximumSize”
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