Standard No.:	HG/T 21521-2014
English Name:	Welding neck flange manholes with davit to vertical cover
Chinese Name:	垂直吊盖带颈对焊法兰人孔
Chinese Classification:	G91    Chemical machinery and equipment parts
Professional Classification:	HG    Professional Standard - Chemistry
Issued by:	Ministry of Industry and Information Technology
Issued on:	2014-07-09
Implemented on:	2014-11-1
Status:	valid
Superseding:	HG/T 21521-2005 Welding Neck Flange Manholes with Davit to Vertical Cover
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	284.0
Delivery:	via email in 1 business day

1.0.1 This standard is prepared in order to regulate the design of welding neck flange manholes with davit to vertical cover, reduce the repetitive design work, assure the product quality and improve the comprehensive benefits. 1.0.2 This standard is applicable to the design of steel welding neck flange manholes with davit to vertical cover with nominal pressure of PN16~PN40 in chemical, petrochemical and other similar devices. 1.0.3 The design of welding neck flange manholes with davit to vertical cover shall not only meet the requirements of this standard, but also comply with those in the current relevant ones of the nation. 2 Type and Size 2.0.1 The structural type of welding neck flange manholes with davit to vertical cover shall meet the requirements of Figure 2.0.1.

Foreword 1 General Previsions 2 Type and Size 3 Technical Requirements 4 Marks and Examples Normative Standards