jzlogo
jzlogo
B16.5 Class 300 – NPS 1/2-24
HOME ProductSpiral Wound Gasket
B16.5 Class 300 – NPS 1/2-24

B16.5 Class 300 – NPS 1/2-24

【Technology brief】

SPIRAL WOUND GASKETS CLASS 300

【Materia】

SS316

【Size】

 1/2″  to 24″ 

Description

The main characteristic of the Spiral Wound Gasket is the sealing element itself which is manufactured by spirally winding a ‘V’ shaped metallic strip and incorporating a soft filler, generally Graphite, PTFE or specially developed High-Temperature material and it is this that maintains an effective seal at varying temperatures and pressures.

The Spiral Wound Gasket configuration can also include an outer and inner ring. The outer ring acts as a locator within the bolt circle and also as a compression stop supporting the sealing element and resisting ‘blow-out’ by preventing over-compression whilst the inner ring acts as a heat shield and corrosion barrier to protect the actual spiral element from media attack.

Material construction generally depends on the application conditions, predominantly media, temperature and pressure values, the most common construction is 316 Stainless Steel Winding and Inner Ring, a Carbon Steel Outer Ring and Graphite Filler Material.

 

Product Structure

Spiral wound gaskets are used in Refinery, Petrochemical, Chemical, Steam lines and Process Industries, where they have many advantages over older types of gaskets.

FLANGE STANDARDS

FLANGE STANDARDS SOR, SIO, SIOH, SIR type spiral wound gaskets can be manufactured in accordance with all relevant gasket standards and specifications to suit the following

ASME/ANSIB16.5 MSS SP44 (ASME B16.47 SERIES A) (AWWA)
BS 1560, BS10, BS4504 DIN FLANGES, JIS FLANGES
API 605 (ASME B16.47 SERIES B) FRENCH NF STANDARD

COMMON FILLERS USED

FILLERS MATERIALS MAX. WORKING TEMPERATURE
Graphite Mica 350 F (Temperature)
Graphite 99.8% purity 1200 C
Non-asbestos 550 C
PTFE 250 C
Ceramic 1000 C

WINDING MATERIAL:

SS304 650 Deg C
SS316 800 Deg C
SS347 870 Deg C
SS321 870 Deg C
Monal400 800 Deg C
Nickel 200 600 Deg C
Titanium 540 Deg C
Iconel600 1000 Deg C
Inconel625 1000 Deg C
Incoloy825 1000 Deg C

INNER AND OUTER RING

Carbon Steel, Stainless Steel 304,304L, 316,316L,316Ti,321,347, MONEL® 400,Inconel® 600,625,800, Incoloy® 800, 825, Nickel 200, Titanium, Hastelloy, Copper.

SPIRAL WOUND GASKET SIZES

Size & Shape as per Prevailing International standards or Customer needs can be produce

Technical Parameters

Spiral wound Gasket Dimensions: ASME B16.20: For Flanges to B16.5 CLASS 300 LB

NPS Inner Ring Sealing Element Outer Ring
  Inside Dia (d1) Inside Dia (d2) Outside Dia (d3) Outside Dia (d4)
½ 14.2 19.1 31.8 54.1
¾ 20.6 25.4 39.6 66.8
1 26.9 31.8 47.8 73.2
1 ¼ 38.1 47.8 60.5 82.6
1 ½ 44.5 54.1 69.9 95.3
2 55.6 69.9 85.9 111.3
2 ½ 66.5 82.6 98.6 130.3
3 81.0 101.6 120.7 149.4
4 106.4 127.0 149.4 181.1
5 131.8 155.7 177.8 215.9
6 157.2 182.6 209.6 251.0
8 215.9 233.4 263.7 308.1
10 268.2 287.3 317.5 362.0
12 317.5 339.9 374.7 422.4
14 349.3 371.6 406.4 485.9
16 400.1 422.4 463.6 539.8
18 449.3 474.7 527.1 596.9
20 500.1 525.6 577.9 654.1
24 603.3 628.7 685.8 774.7

 

Related products

HGFF

VideoRead More »

HGFF GROUP CO.,LTD

MESSAGE

We ask the service staff to always think about the customers, solve the problems of the equipment in time, and make sure that the interests of customers are above everything else.

WhatsApp chat