管件的質(zhi)(zhi)量等于上述管件尺寸表(biao)格(ge)中(zhong)給出(chu)的質(zhi)(zhi)量（不(bu)含接口質(zhi)(zhi)量）加上所采用接口型式(shi)承口的近似(si)質(zhi)(zhi)量或法蘭盤的質(zhi)(zhi)量。