ASME B16.20 Spiral Wound Gaskets

Spiral Wound Gasket manufacturer in India

ASME B16.20 standard outlines the specifications for gaskets used in pipe, flange and flange fittings covering dimensions, materials, tolerances, marking and testing methods. Among the gasket types detailed in this standard is the used Spiral Wound Gasket. Spiral Wound Gaskets (SWGs) play a role in managing temperatures, pressures and variable temperature environments. These gaskets are crafted from a shaped metallic strip wound with a softer filler material typically made of flexible graphite or PTFE. They offer strength and resilience for superior sealing performance. With their blend of materials SWGs exhibit thermal and mechanical properties that make them a preferred option for demanding applications like those found in the oil, gas and petrochemical sectors.

The design of wound gaskets allows for compressibility and recovery rates ensuring reliable sealing even during changes in operating conditions. The metal winding gives support to the gasket while the softer filler material provides flexibility for sealing under varying pressures and temperatures. ASME B16.20 provides guidelines on compatibility to ensure Spiral Wound Gaskets fit properly between flanges. The standard also specifies load requirements that each gasket must meet. Ensuring compliance with the ASME B16.20 standard is essential to guarantee the operation of these gaskets in demanding pressure and high temperature environments.

Spiral Wound Gaskets as outlined in the ASME B16.20 guidelines provide a durable and adaptable sealing option, for challenging settings. They deliver top notch performance quality, backed by standards and criteria set forth by the ASME B16.20.

CG Type Spiral Wound Gasket Specification List

View various color codes and types of Spiral Wound Gasket Material, manufacturer of Flange Spiral Wound Metallic Gasket

Spiral Wound Gaskets thickness	2.5, 3.2, 4.5, 6.4, 7.2
API Spiral Wound Gasket Pressure Rating	Upto 400bar
Flexitallic Spiral Wound Gasket Temperature	-250 to +1000 degree C

Spiral Wound Gasket Material Configurations

Winding / Inner / Outer Ring Material Combinations	Maximum Temperature	ASME B16.20 Colour Coding
Carbon Steel	500⁰C	Silver
304 Stainless Steel	550⁰C	Yellow
316/L Stainless Steel	550⁰C	Green
316 Ti Stainless Steel	650⁰C	Light Blue
321 Stainless Steel	650⁰C	Turquoise
347 Stainless Steel	650⁰C	Blue
Duplex	800⁰C	N/A
Nickel 200	600⁰C	Red
Monel 400	600⁰C	Orange
Titanium	350⁰C	Purple
Hastelloy B-2	450⁰C	Brown
Hastelloy C-276	450⁰C	Beige
Inconel 600	950⁰C	Gold
Inconel 625	450⁰C	Gold
Inconel X-750	1000⁰C	Light Grey
Incoloy 825	450⁰C	White

Spiral Wound Gaskets Winding Material

Winding Material	Recommended Maximum Temperature
304 Stainless Steel	650 ^oC
304L Stainless Steel	650 ^oC
316 / 316L Stainless Steel	650 ^oC
316Ti Stainless Steel	650 ^oC
347 Stainless Steel	650 ^oC
321 Stainless Steel	650 ^oC

Filler Material of SS316 Spiral Wound Gasket

Filler Material	Recommended Maximum Temperature
Graphite	550 ^oC
PTFE	260 ^oC
CAF	440 ^oC

Types of SS Spiral Wound Gasket

ASME B16.20 Filler 316 Spiral Wound Gasket

Spiral Wound Gasket With Filter Screen

Asme B 16.20 Flexible Graphite Spiral Wound Gasket

Customized Stainless Steel Flat Metal Spiral Wound Ring Gasket

SS 304 Spiral Wound Gasket

ASME B16.5 Flanges Spiral Wound Gasket

Class 150 API Spiral wound Gasket Dimensions Schedule

Stocking distributor of Flexitallic Spiral Wound Gasket, exporter of ASME B16 20 Gaskets in India

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	47.8
¾	20.6	25.4	39.6	57.2
1	26.9	31.8	47.8	66.8
1¼	38.1	47.8	60.5	76.2
1½	44.5	54.1	69.9	85.9
2	55.6	69.9	85.9	104.9
2½	66.5	82.6	98.6	124.0
3	81.0	101.6	120.7	136.7
4	106.4	127.0	149.4	174.8
5	131.8	155.7	177.8	196.9
6	157.2	182.6	209.6	222.3
8	215.9	233.4	263.7	279.4
10	268.2	287.3	317.5	339.9
12	317.5	339.9	374.7	409.7
14	349.3	371.6	406.4	450.9
16	400.1	422.4	463.6	514.4
18	449.3	474.7	527.1	549.4
20	500.1	525.5	577.9	606.6
24	603.3	628.7	685.8	717.6

ASME B16.5 CLASS 300 LB Spiral wound Gasket Dimension

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

ASME B16.47 CLASS 150 LB API Spiral Wound Gasket Dimension Chart

NPS	Inner Ring	Sealing	Element	Outer Ring
	Inside Dia (d1)	Inside Dia (d2)	Outside Dia (d3)	Outside Dia (d4)
26	654.1	673.01	704.9	774.7
28	704.9	723.9	755.7	831.9
30	755.7	774.7	806.5	882.7
32	806.5	825.5	860.6	939.8
34	857.3	876.3	911.4	990.6
36	908.1	927.1	968.5	1047.8
38	958.9	977.9	1019.3	1111.3
40	1009.7	1028.7	1070.1	1162.1
42	1060.5	1079.5	1124.0	1219.2
44	1111.3	1130.3	1178.1	1276.4
46	1162.1	1181.1	1228.9	1327.2
48	1212.9	1231.9	1279.7	1384.3
50	1263.7	1282.7	1333.5	1435.1
52	1314.5	1333.5	1384.3	1492.3
54	1358.9	1384.3	1435.1	1549.4
56	1409.7	1435.1	1485.9	1606.6
58	1460.5	1485.9	1536.7	1663.7
60	1511.3	1536.7	1587.5	1714.5

Dimension Standard of Aerosil Spiral Wound Gasket Series A CLASS 300 LB

NPS	Inner Ring	Sealing	Element	Outer Ring
	Inside Dia (d1)	Inside Dia (d2)	Outside Dia (d3)	Outside Dia (d4)
26	654.1	685.8	736.6	835.2
28	704.9	736.6	787.4	898.7
30	755.7	793.8	844.6	952.5
32	806.5	850.9	901.7	1006.6
34	857.3	901.7	952.5	1057.4
36	908.1	955.8	1006.6	1117.6
38	952.5	977.9	1016.0	1054.1
40	1003.3	1022.4	1070.1	1114.6
42	1054.1	1073.2	1120.9	1165.4
44	1104.9	1130.3	1181.1	1219.2
46	1152.7	1178.1	1228.9	1273.3
48	1209.8	1235.2	1286.0	1324.1
50	1244.6	1295.4	1346.2	1378.0
52	1320.8	1346.2	1397.0	1428.8
54	1352.6	1403.4	1454.2	1492.3
56	1403.4	1454.2	1505.0	1543.1
58	1447.8	1511.3	1562.1	1593.9
60	1524.0	1562.1	1612.9	1644.7