TOBO STEEL GROUP CHINA
| Payment Terms | D/P, T/T, Western Union |
| Supply Ability | 30000PCS |
| Delivery Time | 7work days |
| Packaging Details | Plywood wooden cases |
| 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 |
| Brand Name | TOBO |
| Model Number | SS316L, 304 |
| Certification | ISO |
| Place of Origin | China |
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Product Specification
| Payment Terms | D/P, T/T, Western Union | Supply Ability | 30000PCS |
| Delivery Time | 7work days | Packaging Details | Plywood wooden cases |
| 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 |
| Brand Name | TOBO | Model Number | SS316L, 304 |
| Certification | ISO | Place of Origin | China |
| High Light | ANSI Metal Spiral Wound Gaskets ，900lb Pipeline Sealing Flange Gasket ，ANSI B16.47 Sealing Flange Gasket | ||
Asme/ANSI B16.20 Metal Spiral Wound Gaskets, Flange Gaskets, Valve Gaskets
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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 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.
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.
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
Filling | Steel band | Inner ring | Outer ring |
| Asbestos wrapping | SUS 304 | Carbon steel | Carbon steel |
| Graphite wrapping | SUS 316 | SUS 304 | SUS 304 |
| Teflon 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 |
| Teflon wrapping | 240~260 | 100 |
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 |
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 |
Item | Thickness(mm) | Tolerances(mm) |
| Gasket thickness | 4.5, 3.2 | +0.2 -0.1 |
| Ring thickness | 3.0 | ±0.24 |
Company Details
Business Type:
Manufacturer,Seller
Year Established:
2014
Total Annual:
3000000-6000000
Employee Number:
50~80
Ecer Certification：
Active Member
We are a manufacturer specializing in the production of valves, we have advanced production technology and inspection equipment, to prevent defective products We can supply Stainless Steel Ball Valve,Stainless Steel Gate Valve,Stainless Steel Globe Valve,Flange Check Valve,Wafer Bu... We are a manufacturer specializing in the production of valves, we have advanced production technology and inspection equipment, to prevent defective products We can supply Stainless Steel Ball Valve,Stainless Steel Gate Valve,Stainless Steel Globe Valve,Flange Check Valve,Wafer Bu...
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