ASME B16.20 600lb high pressure SS316 graphite with PTFE filler spiral wound gasket used for Industrial pipeline sealing

Standard:Asme B16.20

Application:Pipeline, flange, valve, food, medicine, chemical, petroleum, ship

Material:Carbon steel soft iron , Stainless steel ,rubber etc

Service:Customize ODM OEM

Size:1/2"-48"

Pressure:150lb-2500lb

Certificate:ISO9001,ASME , API

Hardness:90BHN, 120BHN, 160BHN, 230 BHN

Packaging Details:Standard Sea-Worthy Package

MOQ:12PCS

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Product Details
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FAQ

Flange gaskets

A spiral wound gasket is a semi-metallic gasket. It consists of a spirally wound v-shaped metallic with a non-metallic filler material. There are three elements that constitute a spiral wound gasket. They are:
Outer ring:
Also known as a guide ring or centering ring, the outer ring of a spiral wound gasket is usually made of carbon steel material.
The main purpose of this element is to center the gasket while inserting it into a bolted flange joint.Inner ring:
The inner ring is one of the most important parts of a spiral wound gasket as it prevents windings from buckling inside the pipe. In the situations of buckling of a gasket, parts of it get sucked into the pipe and eventually flow through the piping system to get caught/wrapped on something. Inner rings prevent this phenomenon and help in avoiding the problem.

Sealing element:
This is the element of the spiral wound gasket that creates a tight seal to prevent leaks. The sealing element encompasses both windings and filler material. In general, spiral wound gaskets use a flexible graphite filler material rated for high temperatures. Graphite as filler material also helps the gasket avoid flange distortion and joint misalignment. Another common filler material is PTFE (Polytetrafluoroethylene). However, PTFE is not suitable for use in high-temperature applications.

Flange gaskets are divided into rubber gaskets, graphite gaskets, and metal spiral gaskets (basic type). They use standard and
high-quality SS304, SS316 (“V” or “W” shape) metal belts and other alloy materials with graphite and PTFE. Other flexible
materials are overlapped and spirally wound, and the metal band is fixed by spot welding at the beginning and the end. Its
function is to play a sealing role in the middle of the two flanges.

Performance

Performance: high temperature, high pressure, corrosion resistance, good compression rate and rebound rate. Application: Sealing
parts of pipes, valves, pumps, manholes, pressure vessels and heat exchange equipment at the joints of petroleum, chemical,electric power, metallurgy, shipbuilding, papermaking, medicine, etc. are ideal static sealing materials.

Stainless steel belt shape: “V” “W” “SUS” “U”. Stainless steel belt material: A3, 304, 304L, 316, 316L, Monel, titanium Ta. Adaptation Medium: suitable for high temperature
and high pressure steam, oil, oil and gas, solvent, hot coal body oil, etc.

Spiral Wound Gaskets Specification

Standards : ASME B16.20

Size : 1/2 ” – 48″

Gasket Thickness : 3.2mm, 4.5mm, 6.4mm,7.3mm

Pressure – ASME B16.20 150, 300, 400, 600, 900, 1500, 2500

Outer and Inner ring Material : Carbon Steel, Stainless Steel 304/316, Monel, Nickel, Titanium, Inconel 600/625, etc.

Temperature Range: -400°F to +875°F

Maximum Pressure: 2000 PSI

High Pressure: 4500 PSI

Manufactured Standards: ASME B 16.20, ASME B 16.5, BS1560, ASME B 16.47 A (B), BS EN 1092, DIN, JIS, and NF, etc.

Value Added Services : Hot Rolling, Cold Rolling, Galvanizing, Heat Treatment, Tempering, Electro Polishing, Threading, Sand Blasting, Soldering

MATERIALS

1. Metal band

A. 08F0CR13,0Cr18Ni19Ti, 0Cr18Ni9Ti, 00CR18NI10,0CR18NI12MO2TI, 00CR17NI14MO2 and other cold-rolled steel strips with thickness of 0.15 mm ~ 0.25 mm were used, or were decided by both the supplier and the demand.

B. The metal band should be preformed v-or W-type narrow band with smooth surface. Clean, not rough. Crack. Cut. Defects such as pits and rust spots.

C. The hardness of stainless steel HV ≤200

2.Non-metallic strips

A.non-metallic strips are specially made of asbestos, flexible graphite, polytetrafluoroethylene, non-asbestos fiber and mica, etc. .The thickness of the belt is 0.3-1.0 mm.

B. The loss on ignition of special asbestos must be less than 25%

C. The content of chloride ion in nonmetal band is less than 100 ppm

D. Temperature and pressure are recommended for all types of media and non-metallic tapes

Dielectric material	Asbestos	Graphite	Non-asbestos	PTFE
Water Media	600℃，CL 2500	550℃，CL 1500	350℃，CL 1500	-200-260℃，CL 1500
Oil medium	500℃，CL 1500	550℃，CL 600	350℃，CL 600	-200-260℃，CL 600
Gas medium	400℃，CL 600	550℃，CL 400	350℃，CL 400	200-260℃，CL 400

Note: Graphite can be used up to 800 ° C in non-oxidizing medium.

Materials	Temperature ℃	Maximum work pressure	Suitable medium	Compression Rate%	Rebound%	Stress relaxation rate%
Expanded graphite	-220–550	250 BAR	Corrosive medium	18–30	≥17	≤18
Special Asbestos Tape	-200—600			18–30	≥19	≤28
PTFE	-200– 250	100 BAR	Corrosive medium	18–30	≥15	≤13
Non-asbestos materials	-100–250	100 BAR	General air tightness	18–30	≥19	≤28
Mica	-150–800	100 BAR	High temperature	18–30

3. Unless otherwise agreed, the material of the inner ring shall be the same as that of the metal strip. The material of the outerring shall be A3 steel and shall be antirust.

Special material winding gasket

Using 321, dual-phase steel, Monel, indium nickel, Harrington alloy, special stainless steel or alloy materials, such as titanium, are used as winding gaskets, which are made of winding steel belt, inner and outer rings, high purity nuclear grade graphite, expanded tetrafluoro, non-asbestos and other non-metallic materials, flange sealing under special working conditions such as strong radiation.

Performance characteristics

Can be in a variety of ultra-high temperature. Low temperature cyclic alternating, strong corrosion and strong radiation to maintain its excellent sealing performance under various extreme harsh conditions.

TECHNICAL INFORMATION

Folding temperature

Graphite metal wound gasket using temperature-200-850 ° C

Asbestos metal wound gasket using temperature-200-500 ° C

Teflon metal wound gasket using temperature-200-260 ° C

Note

When ordering the winding pad to provide the supplier with specific standards, materials, nominal size, pressure level, or
specify the specific size. Size: D1XD2XD3XD4

The commonly used product standards

. HG20610 European system of Ministry of Chemical Industry

· HG20631 The inter-n System of the Ministry of Chemical Industry

· GB/T4622.2 national standard

· JB/T4719 Mechanical Standard

· SH3407 petrochemical enterprise

· ASME B16.20 US Standard

· Din GERMAN Standard

· JIS B2404-1999 JIS TS-1998 JAPEN standard

· BS 3381-1999 UK standard

Points to note

1. The winding part of the gasket must be between the flange sealing surface, and the width of the winding part can not be widened at will.

2. It is better not to use the basic gasket on the concave-convex flange, because the basic gasket in the flange axial
compression force, gasket inner ring solder joints easy to open, resulting in gasket failure.

3. Under the bad working conditions such as high temperature, cold or frequent alternation of cold and heat, large vibration and strong corrosion medium, the gaskets for flat flanges and convex flanges should be fitted with inner rings of reasonable materials.

4. Never replace high-quality gaskets with low-quality ones. Avoid material corrosion or other causes of gasket failure..

Purchase options

1. Choose Gasket according to working condition and type of flange sealing surface.

2. Choose the products of the manufacturing enterprise with sound quality management system and effective operation, preferably those with special equipment (pressure piping components) manufacturing license and valid type test report.

3. Compressibility, resilience and sealing performance are important performance indexes of seal gaskets. Generally speaking, the higher the resilience is, the better it is, the test value for the compression ratio is also better. Should choose the product with good sealing performance, moderate compression ratio and maximum rebound rate.

4, gasket body surface does not allow to affect the sealing performance of the scars, gaps, uneven and rust spot defects. The non-metal belt on the surface of gasket body should be even, appropriately higher than the metal belt, the layer texture should be clear, but the metal belt can not be exposed. The solder joint spacing of the metal winding gasket should be
uniform, there should be no defects such as non-fusion or over-melting. There should be no Burr, bump or rust on the surface of the reinforcing ring. The space between the upper and lower sealing surfaces of the gasket and the upper and lower surfaces of the reinforcing ring should be equal The outer reinforcing ring and the gasket main body should maintain the localization and may loosen appropriately.

Product Features
* Durable, easy installation and removal.
* Inner ring can help shield sealing elements from erosion caused by abrasive media.
* It can adjust to temperature changes, shock, and vibration, and can be used at fairly high temperatures and pressures.
* Available in wide ranges of materials for various services.
* Chemical resistance.
* Extra-long shelf life

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we offer customization as per your requirment

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A:1, After order confirmed, we have a meeting with the main peoples who work for workshop before production,investigate all the workmanship and some technical problems, ensure all of them have related ways tosettle and control.

2, Inspect all the materials when arrived, ensure they will be catch up customers's requirements.

3, Inspect the semi-finished goods.

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5, Final inspection when pack up all the goods.if there is not any problems for this step,our QC will issue the inspection report and release this products.

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Q4. How about your delivery time?
A: Generally, it will take 10 to 30 days after receiving your advance payment. The specific delivery time depends
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