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Asme/ANSI B16.20 Metal Spiral Wound Gaskets Flange Gaskets Valve Gaskets

Asme/ANSI B16.20 Metal Spiral Wound Gaskets Flange Gaskets Valve Gaskets

  • Asme/ANSI B16.20 Metal Spiral Wound Gaskets Flange Gaskets Valve Gaskets
  • Asme/ANSI B16.20 Metal Spiral Wound Gaskets Flange Gaskets Valve Gaskets
Asme/ANSI B16.20 Metal Spiral Wound Gaskets Flange Gaskets Valve Gaskets
Product Details:
Place of Origin: China
Brand Name: TOBO
Certification: ISO
Model Number: SS316L, 304
Payment & Shipping Terms:
Minimum Order Quantity: 10 PCS
Price: 1.2USD
Packaging Details: Plywood wooden cases
Delivery Time: 7work days
Payment Terms: D/P, T/T, Western Union
Supply Ability: 30000PCS
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Detailed Product Description
Flange Standard: ANSI B16.5 ANSI B16.47 A/B Service: For Oil And Gas Pipeline Sealing
Pressure: 150lb 300lb 600lb 900lb 1500lb 2500lb Gasket Standard: B16.20
Specification: 1/2"-64" HS Code: 8484100000
High Light:

ANSI Metal Spiral Wound Gaskets

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900lb Pipeline Sealing Flange Gasket

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ANSI B16.47 Sealing Flange Gasket

Asme/ANSI B16.20 Metal Spiral Wound Gaskets, Flange Gaskets, Valve Gaskets

 

 

The following table refers to tolerances for the diameter of wrapping pad (namely the nominal pipe diameters for the use of flange):

  DIM(mm) ANSI B16.5
BS1560(mm)
Mss sp-44
API605 Tolerances
Inner ring diameter
Pad inner diameter
<=600 <=24" >=26" and <=34" ±0.5
>600 and <=800 >24" and <=34 >=36" and <=60" ±0.9
>800 and <=1600 >34" and <=60"   ±1.3
>1600 >60"   ±1.6
Pad outer diameter <=600 <=24" <=24" ±0.9
>600 and <=160000 >24" and <=60"   ±1.8
1600 >60"   ±2.2
Outer ring diameter     >1/2" and <=60" ±0.9
<=600 <=24"   0-1.0
>600 and <=1000 >24" and <=34"   0-1.8
>1000 and <=1600 >34" and <=60"   0-2.2



The concept of spiral wound gasket construction was originated by Flexitallic in 1912, inaugurating the beginning of a new era in safe, effective sealing. The primary purpose for this development was the increasingly severe temperatures and pressures used by U.S. refinery operators in the first half of the century.

The necessity for a gasket to have the ability to recover cannot be over emphasized. The effects of pressure and temperature fluctuations, the temperature differential across the flange face, together with bolt stress relaxation and creep, demand a gasket with adequate flexibility and recovery to maintain a seal even under these varying service conditions. The Spiral Wound Gasket is the precision engineered solution to such problems, meeting the most exacting conditions of both temperature and pressure in flanged joints and similar assemblies and against virtually every known corrosive and toxic media.The spiral wound gasket meets the most exacting conditions of both temperature and pressure in flanged joints and similar assemblies and against every known corrosive and toxic media.

ASME B16.20 which covers spiral wound gaskets requires the use of solid metal inner rings in: Pressure Class 900, nominal pipe sizes 24 and larger, Pressure Class 1500 from nominal pipe sizes 12 and larger, Pressure Class 2500 from nominal pipe sizes 4 and larger and all PTFE filled gaskets. In the same standard is also described how a spiral wound gasket should be characterized, below you will find a image on it.

Basic Type
ASME B16.20 Metal Sealing Spiral Wound Gasket

Basic construction type, inner and outer diameters are reinforced with several piles of metal without filler to give greater stability and better compression characteristics. - Suitable for tongue and groove, male and female or grooved to flat face flange assemblies.
 

Inner Ring Type
ASME B16.20 Metal Sealing Spiral Wound Gasket

Solid inner metal ring acts as a compression stopper. To prevent accumulation of solids, reduce turbulent flow of process fluids and minimize erosion, damages of gasket between flange bore and the inside diameter, the annular space is filled up by solid inner metal ring. - Suitable for male and female pipe flanges.

 

Outer Ring Type
ASME B16.20 Metal Sealing Spiral Wound Gasket

Solid outer ring accurately locates the gasket on the flange face to give the additional radial strength to prevent the gasket blowout and acts as a compression limiter. In case of installing the outer ring, it is very easy to install the gasket to flange face because the end of outer ring will touch at bolts - Suitable for use with flat face and raised face flanges. For class 900 and above an internal ring is recommended.

Inner & Outer Rings Type
ASME B16.20 Metal Sealing Spiral Wound Gasket

 

A inner ring and outer ring type gasket will give an additional compression limiting stopper for gasket inner and outer side. It will prevent the corrosions on flange face at annular space. - Suitable for use with flat face and raised face flanges and specified for high pressure / temperature service - Class 900 and above or where corrosive or toxic media are present.

Product Description


tructural material of metallic wrapping pad:

Filling
Steel band Inner ring Outer ring
Asbestos wrapping SUS 304 Carbon steel Carbon steel
Graphite wrapping SUS 316 SUS 304 SUS 304
wrapping SUS 316L SUS 316 SUS 316
    SUS 316L SUS 316L
Filling Temperature(ºC) Max operating pressure(kg/cm2)
Asbestos wrapping -200~550 250
Graphite wrapping -150~450 100
wrapping 240~260 100


The following table lists metallic materials for inner ring and wrapping:

Product name
AISI Hardness(HB/HV) Temperature(°C)
304 Stainless steel 304 130~180 -250~+550
316 Stainless steel 316 130~180 -100~+550
316L Stainless steel 316L 130~190 -100~+550

Outer ring is often made from carbon steel subject to anti-corrosive treatment.

Flange type and form of wrapping pad:

Flange type
Spiral wound gasket form
Flat face flange(F.F) Wrapping pad with outer ring only
Wrapping pad with inner and outer rings
Raised face flange(R.F) Wrapping pad with outer ring only
Wrapping pad with inner and outer rings
Male and female flange(M & F) Basic wrapping pad
Wrapping pad with inner ring only
Tongue and groove flange(T & F) Basic wrapping pad
Wrapping pad with inner ring only
Flat and groove flange(F & G) Basic wrapping pad
Wrapping pad with inner ring only


Wrapping pad thickness tolerance:

Item
Thickness(mm) Tolerances(mm)
Gasket thickness 4.5, 3.2 +0.2
-0.1
Ring thickness 3.0 ±0.24

Asme/ANSI B16.20 Metal Spiral Wound Gaskets Flange Gaskets Valve Gaskets 4



 

 

Contact Details
TOBO STEEL GROUP CHINA

Contact Person: Ellen

Tel: 15821287672

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