Stadard GB/T 4622.2-2008 Tiêu chuẩn Spiral Wound Gasket

GB/T 4622.2-2008

Dimensions for spiral wound gaskets for pipe flanges

ICS 23.040.60

J15

National Standards of People's Republic of China

Replacing GB/T 4622.2-2003

Spiral wound gasket flange gasket size

Posted 2008-08-25

2009-04-01 implementation

Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China

Standardization Administration of China released

Foreword

GB/T 4622 "spiral wound gasket" consists of three parts.

--- GB/T 4622.1 spiral wound gaskets;

--- GB/T 4622.2 spiral wound gasket flange gasket size;

--- GB/T 4622.3 spiral wound gaskets technical conditions.

This section GB/T 4622 Part 2.

This Part replaces GB/T 4622.2-2003 "spiral wound gasket flange gasket size."

This section marked with PN flange gaskets dimensions EN1514-2 "Flanges and their joints marked with PN flange gaskets foot

Inch Part 2. Steel flanges with spiral wound gasket "(2005), marked with Class size and flange gaskets ASMEB16.20a

"Pipe flanges with metal ring gasket, spiral wound gasket and covering the gasket" (2007 edition) the degree of consistency is not equivalent. The main differences are as follows.

--- Increase the basic type and with inner ring type two spacer size;

--- Marked with locator Class ring, with inner ring and retaining ring gasket type is determined by the size D4 of flanges.

Section compared with the GB/T 4622.2-2003 The main changes are as follows.

--- Modify the original standard way of marking the nominal pressure, canceled after the unit nominal value. If the original standard

PN1.6MPa now changed to. PN16; original standard part of the inter-American system with a nominal size of shim PN mark, now repair

Replaced by Class mark, as in the original standard PN2.0MPa now revised to Class150;

--- Spacer size arranged respectively PN nominal pressure and Class two series;

--- Deleted the Chapter 3, "gasket type", Chapter 4, "with the flange gasket sealing surface suitable type," and Chapter 6, "spiral wound gasket

Classification and labeling ", Chapter 7," wound gaskets technical conditions ";

--- Modify the size with inner ring type gasket;

--- Modified with retaining ring, D1, D2 and D3 dimensions and positioning of the inner ring with gasket; to locate PN labeled with a ring band

Ring and positioning the ring gasket D3 dimensions change according to PN10 ~ PN40, PN63 ~ PN250 segment breakdown;

--- Remove the mark in Class DN650 and above, with the positioning ring spacer size;

--- Spacer to mark public PN nominal size expanded to DN3000, nominal pressure up to PN250.

This part is proposed by China Machinery Industry Federation.

This part of the National Standardization Technical Committee pipe accessories.

This section is drafted. the machine Productivity Promotion Center, Cixi City Hengli Sealing Material Co., Ltd. Ningbo born seals,

Zhejiang Cathay Pacific sealing materials Co., Ltd.

The main drafters of this section. Li Junying, Qiu wide horizontal, Action to root, Wu Yimin, Feng Feng.

This part of the standard replaces the previous editions are.

--- GB 4622.2-88, GB 4622.2-93, GB/T 4622.2-2003.

Spiral wound gasket flange gasket size

1 Scope

GB/T 4622 provisions of this part of the tube wound gasket flange types and dimensions.

This section applies to nominal pressure PN10 ~ PN250 and Class150 ~ Class1500 pipe flange wound gasket.

Type 2 spacer

Spiral wound gasket of the type shown in Figure 1 to 4.

Figure 1 Basic spiral wound gasket

Figure 2 type spiral wound gasket with inner ring

Figure 3 with the positioning ring spiral wound gasket

4 with inner ring and the positioning ring spiral wound gasket

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