18 900# SPIRAL WOUND GASKET 304 STAINLESS STEEL INNER RING, 304 STAINLESS STEEL WINDING, FLEXIBLE GRAPHITE FILLER, 304 STAINLESS STEEL OUTER RING

$183.42/EA

Quantity	Price
Quantity	Price
1	$183.42/ EA
10	$169.81024/ EA
40	$111.94123/ EA
120	$88.0416/ EA

In Stock

Product Specification
Governing Standards
Color Codes
Dimensional Specifications
Substitute Products

Product Specification

Pipe Diameter	18
Flange Rating	900#
Full Face or Ring	Ring
Inside Diameter	16.7500
Outside Diameter	25.1300
Thickness	0.1750
Outer Ring Material	304 Stainless Steel
Inner Ring Material	304 Stainless Steel
Winding Material	304 Stainless Steel
Filler/Binder Material	Flexible Graphite
Material	Metal
Origin	Unrestricted Origin
Weight	9.06,

Color Codes

Color CodesSpiral Wound Gasket

Spiral wound gaskets shall be marked with a color code that identifies the windings and filler materials. A continuous color around the outer edge of the centering ring shall identify the winding metal. The color identifying the filler material for NPS 1 1/2 and larger shall have four intermittent stripes spaced approximately 90 deg apart on the outer edge of the centering ring. Smaller size gaskets shall have a minimum of two stripes 180 deg apart. The colors shall conform to those listed in the table below.

Per ASME B16.20-2007
Metallic Winding Materials	OD Color Code
Carbon Steel	Silver
304 Stainless Steel	Yellow
316L Stainless Steel	Green
317L Stainless Steel	Maroon
321 Stainless Steel	Turquoise
347 Stainless Steel	Blue
Monel 400	Orange
Nickel 200	Red
Titanium	Purple
20Cb-3 Alloy	Black
Hastelloy B	Brown
Hastelloy C	Beige
Inconel 600	Gold
Incoloy 800	White

Per ASME B16.20-2007
Nonmetallic Filler Materials	Color Code
Polytetrafluoroethylene	White Stripe
Mica-Graphite	Pink Stripe
Flexible Graphite	Gray Stripe
Ceramic	Light Green Stripe

Dimensional Specifications

Dimensional SpecificationsSpiral Wound Gasket

Per ASME B16.20-2017
		Pipe Diameter
		1/2	3/4	1	1 1/4	1 1/2	2	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24
Inner Ring ID per Class	150#	0.56	0.81	1.06	1.50	1.75	2.19	2.62	3.19	4.19	5.19	6.19	8.50	10.56	12.50	13.75	15.75	17.69	19.69	23.75
	300#	0.56	0.81	1.06	1.50	1.75	2.19	2.62	3.19	4.19	5.19	6.19	8.50	10.56	12.50	13.75	15.75	17.69	19.69	23.75
	600#	0.56	0.81	1.06	1.50	1.75	2.19	2.62	3.19	4.04	5.05	6.10	8.10	10.05	12.10	13.50	15.35	17.25	19.25	23.25
	900#	0.56	0.81	1.06	1.31	1.63	2.06	2.50	3.10	4.05	5.05	6.10	7.75	9.69	11.50	12.63	14.75	16.75	19.00	23.25
	1500#	0.56	0.81	1.06	1.31	1.63	2.06	2.50	3.10	3.85	4.90	5.80	7.75	9.69	11.50	12.63	14.50	16.75	18.75	22.75
	2500#	0.56	0.81	1.06	1.31	1.63	2.06	2.50	3.10	3.85	4.90	5.80	7.75	9.69	11.50
Winding ID per Class	150#	0.75	1.00	1.25	1.88	2.13	2.75	3.25	4.00	5.00	6.13	7.19	9.19	11.31	13.38	14.63	16.63	18.69	20.69	24.75
	300#	0.75	1.00	1.25	1.88	2.13	2.75	3.25	4.00	5.00	6.13	7.19	9.19	11.31	13.38	14.63	16.63	18.69	20.69	24.75
	600#	0.75	1.00	1.25	1.88	2.13	2.75	3.25	4.00	4.75	5.81	6.88	8.88	10.81	12.88	14.25	16.25	18.50	20.50	24.75
	900#	0.75	1.00	1.25	1.56	1.80	2.31	2.75	3.75	4.75	5.81	6.88	8.75	10.88	12.75	14.00	16.25	18.25	20.50	24.75
	1500#	0.75	1.00	1.25	1.56	1.80	2.31	2.75	3.63	4.63	5.63	6.75	8.50	10.50	12.75	14.00	16.00	18.25	20.25	25.25
	2500#	0.75	1.00	1.25	1.56	1.88	2.31	2.75	3.63	4.63	5.63	6.75	8.50	10.93	12.50
Winding OD per Class	150#	1.25	1.56	1.88	2.38	2.75	3.38	3.88	4.75	5.88	7.00	8.25	10.38	12.50	14.75	16.00	18.25	20.75	22.75	27.00
	300#	1.25	1.56	1.88	2.38	2.75	3.38	3.88	4.75	5.88	7.00	8.25	10.38	12.50	14.75	16.00	18.25	20.75	22.75	27.00
	600#	1.25	1.56	1.88	2.38	2.75	3.38	3.88	4.75	5.88	7.00	8.25	10.38	12.50	14.75	16.00	18.25	20.75	22.75	27.00
	900#	1.25	1.56	1.88	2.38	2.75	3.38	3.88	4.75	5.88	7.00	8.25	10.13	12.25	14.50	15.75	18.00	22.50	22.50	26.75
	1500#	1.25	1.56	1.88	2.38	2.75	3.38	3.88	4.75	5.88	7.00	8.25	10.13	12.25	14.50	15.75	18.00	22.50	22.50	26.75
	2500#	1.25	1.56	1.88	2.38	2.75	3.38	3.88	4.75	5.88	7.00	8.25	10.13	12.25	14.50
Outer Ring OD per Class	150#	1.88	2.25	2.63	3.00	3.38	4.13	4.88	5.38	6.88	7.75	8.75	11.00	13.38	16.13	17.75	20.25	21.63	23.88	28.25
	300#	2.13	2.50	2.88	3.25	3.75	4.38	5.13	5.88	7.13	8.50	9.88	12.13	14.25	16.63	19.13	21.25	23.50	25.75	30.50
	600#	2.13	2.50	2.88	3.25	3.75	4.38	5.13	5.88	7.63	9.50	10.50	12.63	15.75	18.00	19.38	22.25	24.13	26.88	31.13
	900#	2.50	2.75	3.13	3.50	3.88	5.63	6.50	6.63	8.13	9.75	11.38	14.13	17.13	19.63	20.50	22.63	25.13	27.50	33.00
	1500#	2.50	2.75	3.13	3.50	3.88	5.63	6.50	6.88	8.25	10.00	11.13	13.88	17.13	20.50	22.75	25.25	27.75	29.75	35.50
	2500#	2.75	2.25	3.38	4.13	4.63	5.75	6.63	7.75	9.25	11.00	12.50	15.25	18.75	21.63

Per ASME B16.47-2017
Series A		Pipe Diameter
Series A		26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60
Inner Ring ID per Class	150#	25.75	27.75	29.75	31.75	33.75	35.75	37.75	39.75	41.75	43.75	45.75	47.75	49.75	51.75	53.50	55.50	57.50	59.50
	300#	25.75	27.75	29.75	31.75	33.75	35.75	37.50	39.50	41.50	43.50	45.38	47.63	49.00	52.00	53.25	55.25	57.00	60.00
	600#	25.50	27.50	29.75	32.00	34.00	36.13	37.50	39.75	42.00	43.75	45.75	48.00	50.00	52.00	54.25	56.25	58.00	60.25
	900#	26.00	28.00	30.25	32.00	34.00	36.25	39.75	41.75	43.75	45.50	48.00	50.00
Winding ID per Class	150#	26.50	28.50	30.50	32.50	34.50	36.50	38.50	40.50	42.50	44.50	46.50	48.50	50.50	52.50	54.50	56.50	58.50	60.50
	300#	27.00	29.00	31.25	33.50	35.50	37.63	38.50	40.25	42.25	44.50	46.38	48.63	51.00	53.00	55.25	57.25	59.50	61.50
	600#	27.00	29.00	31.25	33.50	35.50	37.63	39.00	41.25	43.50	45.75	47.75	50.00	52.00	54.00	56.25	58.25	60.50	62.75
	900#	27.00	29.00	31.25	33.50	35.50	37.75	40.75	43.25	45.25	47.50	50.00	52.00
Winding OD per Class	150#	27.75	29.75	31.75	33.88	35.88	38.13	40.13	42.13	44.25	46.38	48.38	50.38	52.50	54.50	56.50	58.50	60.50	62.50
	300#	29.00	31.00	33.25	35.50	37.50	39.63	40.00	42.13	44.13	46.50	48.38	50.63	53.00	55.00	57.25	59.25	61.50	63.50
	600#	29.00	31.00	33.25	35.50	37.50	39.63	41.00	43.25	45.50	47.75	49.75	52.00	54.00	56.00	58.25	60.25	62.50	64.75
	900#	29.00	31.00	33.25	35.50	37.50	39.75	42.75	45.25	47.25	49.50	52.00	54.00
Outer Ring OD per Class	150#	30.50	32.75	34.75	37.00	39.00	41.25	43.75	45.75	48.00	50.25	52.25	54.50	56.50	58.75	61.00	63.25	65.50	67.50
	300#	32.88	35.38	37.50	39.63	41.63	44.00	41.50	43.88	45.88	48.00	50.13	52.13	54.25	56.25	58.75	60.75	62.75	64.75
	600#	34.13	36.00	38.25	40.25	42.25	44.50	43.50	45.50	48.00	50.00	52.25	54.75	57.00	59.00	61.25	63.50	65.50	68.25
	900#	34.75	37.25	39.75	42.25	44.75	47.25	47.25	49.25	51.25	53.88	56.50	58.50
Per ASME B16.47-2017
Series B		Pipe Diameter
Series B		26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60
Inner Ring ID per Class	150#	25.75	27.75	29.75	31.75	33.75	35.75	37.75	39.75	41.75	43.75	45.75	47.75	49.75	51.75	53.75	56.00	58.19	60.44
	300#	25.75	27.75	29.75	31.75	33.75	35.75	38.25	40.25	42.75	44.25	46.38	48.50	49.88	51.88	53.75	56.25	58.44	61.31
	600#	25.38	27.00	29.63	31.25	33.50	35.50	37.50	39.75	42.00	43.75	45.75	48.00	50.00	52.00	54.25	56.25	58.00	60.25
	900#	26.25	28.25	30.75	33.00	35.25	36.25	39.75	41.75	43.75	45.50	48.00	50.00
Winding ID per Class	150#	26.50	28.50	30.50	32.50	34.50	36.50	38.37	40.25	42.50	44.25	46.50	48.50	50.50	52.50	54.50	56.88	59.07	61.31
	300#	26.50	28.50	30.50	32.50	34.50	36.50	39.75	41.75	43.75	45.75	47.88	49.75	51.88	53.88	55.25	58.25	60.44	62.56
	600#	26.13	27.75	30.63	32.75	35.00	37.00	39.00	41.25	43.50	45.75	47.75	50.00	52.00	54.00	56.25	58.25	60.50	62.75
	900#	27.25	29.25	31.75	34.00	36.25	37.25	40.75	43.25	45.25	47.50	50.00	52.00
Winding OD per Class	150#	27.50	29.50	31.50	33.50	35.75	37.75	39.75	41.88	43.88	45.88	48.19	50.00	52.19	54.19	56.00	58.18	60.19	62.44
	300#	28.00	30.00	32.00	34.00	36.00	38.00	41.25	43.25	45.25	47.25	49.38	51.63	53.38	55.38	57.25	60.00	61.94	64.19
	600#	28.13	29.75	32.63	34.75	37.00	39.00	41.00	43.25	45.50	47.75	49.75	52.00	56.00	56.00	58.25	60.25	62.50	64.75
	900#	29.50	31.50	33.75	36.00	38.25	39.25	42.75	45.25	47.25	49.50	52.00	54.00
Outer Ring OD per Class	150#	28.56	30.56	32.56	34.69	36.81	38.88	41.13	43.13	45.13	47.13	49.44	51.44	53.44	55.44	57.63	59.63	62.19	64.19
	300#	30.38	32.50	34.88	37.00	39.13	41.25	43.25	45.25	47.25	49.25	51.88	53.88	55.88	57.88	60.25	62.75	65.19	67.19
	600#	30.13	32.25	34.63	36.75	39.25	41.25	43.50	45.50	48.00	50.00	52.25	54.75	57.00	59.00	61.25	63.50	65.50	68.25
	900#	33.00	35.50	37.75	40.00	42.25	44.25	47.25	49.25	51.25	53.88	56.50	58.50

All dimensions are in inches.

18 900# SPIRAL WOUND GASKET 304 STAINLESS STEEL INNER RING, 304 STAINLESS STEEL WINDING, FLEXIBLE GRAPHITE FILLER, 304 STAINLESS STEEL OUTER RING

Technical Data

Product Specification

Governing Standards

Governing StandardsSpiral Wound Gasket

Color Codes

Color CodesSpiral Wound Gasket

Dimensional Specifications

Dimensional SpecificationsSpiral Wound Gasket

Substitute Products

18 900# SPIRAL WOUND GASKET 316 STAINLESS STEEL INNER RING, 316 STAINLESS STEEL WINDING, FLEXIBLE GRAPHITE FILLER, 316 STAINLESS STEEL OUTER RING

18 900# SPIRAL WOUND GASKET 316 STAINLESS STEEL INNER RING, 316 STAINLESS STEEL WINDING, FLEXIBLE GRAPHITE FILLER, 316 STAINLESS STEEL OUTER RING

ASME B16.20	Covers metal ring-joint gaskets, spiral-wound gaskets, metal-jacketed gaskets, and grooved metal gaskets with covering layers.
ASME B16.47	Covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60. Included are flanges with rating class designations 75, 150, 300, 400, 600, and 900 with requirements given in both SI (Metric) and U. S. Customary units, with diameter of bolts and flange bolt hole expressed in inch units.