免费无遮拦无码视频在线观看_中国一级 片内射视频播放国产_亚洲欧美日韩一级_少妇无码中文字幕av_三级视频免费电影_成人毛片女人毛片免费看_亚洲AV无码国国产产精品久久一_蜜臀av一区二区蜜臀AV免费_欧美一级在线观看影视_日韩中文字幕推理片

Home-News

Light know foreign valve is good, can in the end where is it?

Updated:2017-03-23

What is standard of sanitary fittings


Sanitary fittings standard, there are many different industries, different countries have their own standard, pipe fittings to execute strictly in accordance with the standard is a guarantee of enterprise products. The following is a brief introduction of common standard sanitary fittings.


On the part of the information we find some detailed information about sanitary fittings.


The sanitary fittings standard: made by ISO, GB, DIN, 3 a, IDF, such as for manufacturing, industrial pipe fittings standards: GB (GB), JIS (Japanese standard), DIN (German standard), ASTM/ASME (American standard), such as standard. GB is mandatory national standards, is the recommended national standards GB/T,


Sanitary fittings standard: DIN (Germany standard), SMS, ISO (international standards), IDF (international), 3 a, RJT, DS, BS, BPE standard, etc.