Standard No.:	HG/T 21520-2005
Chinese Name:	垂直吊盖带颈平焊法兰人孔
English Name:
Professional Classification:	G91 Chemical machinery and equipment parts
Professional Classification:	HG Professional Standard - Chemistry
ICS Classification:	71.120.99 Other chemical equipment
Issued by:
Issued on:	2005-07-10
Implemented on:	2006-01-01
Status:	ABOLISHED
Replace By:	HG/T21520-2014 Hubbed Slip-on-welding Flange Manholes with Davit to Vertical Cover
Replace By Date:	2014-11-01
Language:	English
File Format:	PDF
Word Count:	19000 words
Price(USD):	570 (USD)
Delivery:	via email in 1-5 business day

1 Scope

This standard specifies the types, basic parameters, dimensions, technical requirements and relevant service requirements of hubbed slip-on-welding flange manholes with davit to vertical cover made of carbon steel, low alloy steel and stainless steel.
This standard is applicable to hubbed slip-on-welding flange manholes with davit to vertical cover, of which the nominal pressure PN is 1.0~1.6MPa, the working temperature and the corresponding maximum non-impact working pressure are limited within the range specified in Table 3-2 according to the material category.

2 Normative References

GB/T 41-2000 Hexagon Nuts - Product Grade C
GB/T 95-2002 Plain Washers - Product Grade C
HG 20594-1997 Hubbed Slip-on-welding Steel Pipe Flanges (European System)
HG 20601-1997 Steel Pipe Blank Flanges (European System)
HG 20606-1997 Nonmetallic Flat Gaskets for Steel Pipe Flanges (European System)
HG 20607-1997 PTFE Envelope Gaskets for Steel Pipe Flanges (European System)
HG 20608-1997 Flexible Graphite Compound Gaskets for Steel Pipe Flanges (European System)
HG 20610-1997 Spiral Wound Gaskets for Steel Pipe Flanges (European System)
HG 20613-1997 Fasteners for Steel Pipe Flanges (European System)
HG/T 21514-2005 Type and Technical Specifications of Steel Manhole and Handhole

3 Types, Basic Parameters and Dimensions