HG/T 20630-2009Metal jacketed gaskets for use with steel pipe flanges (Class designated) (English PDF)

1 Scope

This standard specifies the type, dimension, technical requirements and marking of metal jacketed gaskets for use with steel pipe flanges (Class designated).

This standard is applicable to the raised-face metal jacketed gaskets for use with steel pipe flanges that the nominal pressure is Class300 (PN150) in HG/T 20615.

Note. As for the use of the gaskets in which contain the material of asbestos, it shall meet the requirements of the relevant laws and regulations. If the aforesaid gaskets are used, the protective measures shall be adopted to prevent man from damaging.

2 Normative references

The following provisions contained in the following standards are turned into the provisions of this national standard by being referred in this national standard. For date reference, the subsequent amendments to (excluding amending error in the text) or revisions of, any of these publications do not apply. And parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, its latest edition referred to applies.

GB/T 232 "Metallic materials--Bend test" GB/T 710 "Hot-rolled Quality Carbon Structural Steel Sheets and Strips" GB/T 2040 "Sheet of Copper and Copper Alloy" GB/T 2518 "Continuously Hot-dip Zinc-coated Steel Sheet and Strip" GB/T 3280 "Cold Rolled Stainless Steel Plate Sheet and Strip" GB/T 3880 "Wrought Aluminium and Aluminium Alloy Plates, Sheets and Strips for General Engineering" GB/T 3985 "Compressed Asbestos Fiber Jointing" GB/T 15601 "Metal Jacketed Gasket for use with Pipe Flange" HG/T 20615 "Steel Pipe Flange (Class Designated)" HG/T 20635 "Specification for Selection of Steel Pipe Flange, Gaskets and Bolting (Class designated)" JB/T7758.2 "Specifications of Flexible Graphite Sheets"

3 Gasket working conditions

6 Marking and Packaging

6.0.1 The gasket shall be packaged respectively according to the specification and material.

There shall be production quality test conformity certificate at the delivery time; and the specified contents in Article 6.0.2 shall be indicated with labels on each gasket.

6.0.2 Marking content.

1 Standard No. (HG/T 20630);

2 Nominal dimension DN;

3 Nominal pressure Class;

4 The code name of coating metal material (see Table 3.0.1);

5 Filling material.

6.0.3 Marking illustration.

As for metal envelope gasket with 0Cr18Ni9 metal cladding material, whose nominal dimension is DN500 and nominal pressure is Class300, the filling material is flexible graphite;

and the marking is.

HG/T 20630 metal envelope gasket (a) 500-300 304/FG ......