Standard No.:	HG/T 21531-2014
English Name:	Welding neck flange handholes
Chinese Name:	带颈对焊法兰手孔
Chinese Classification:	G91    Chemical machinery and equipment parts
Professional Classification:	HG    Professional Standard - Chemistry
ICS Classification:	11.120.99 11.120.99    Other standards related to pharmaceutics 11.120.99
Issued by:	Ministry of Industry and Information Technology
Issued on:	2014-07-09
Implemented on:	2014-11-1
Status:	valid
Superseding:	HG/T 21531-2005 Welding neck flange handholes
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	284.0
Delivery:	via email in 1 business day

1 General Provisions 1.0.1 This standard is prepared in order to regulate the design of welding neck flange handholes, reduce repetitive design works, ensure product quality and improve comprehensive benefits. 1.0.2 This standard is only applicable to the design of welding neck flange handholes made of steel with nominal pressure of PN23~PN63 in chemical, petrochemical plants and other similar devices. 1.0.3 The design of welding neck flange handholes shall not only comply with those specified in this standard, but also comply with those specified in the current relevant ones of the nation. 2 Structure Type and Size 2.0.1 The structure type of welding neck flange handholes shall meet those specified in Figure 2.0.1. ... ... ... ...

1 General Provisions 2 Structure Type and Size 3 Technical Requirements 4 Mark and Examples Normative Standards