Download or read book GB T 12221 2005 Translated English of Chinese Standard GBT 12221 2005 GB T12221 2005 GBT12221 2005 written by https://www.chinesestandard.net and published by https://www.chinesestandard.net. This book was released on 2015-09-15 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Standard specifies the basic series of face-to-face, centre-to-face, end-to-end and centre-to-end dimensions of flanged joint valves, welded end valves, wafer type connection valves, female thread connection valves, male thread connection valves, and the permissible variations of structural dimensions.