Spiral Wound Gaskets

SpiroNat

We manufacture “SpiroNat” spiral-wound gaskets and are committed to providing our customers requirements in the most expeditious manner possible.

How to Order

NPS

Nominal Pipe Size

PSI

ANSI Pressure

Style

Material

Winding and Filler Material

Series or Thickness

Examples

Standard API 601
NPS	3″
PSI	150#
Style	XR
Material	304ss/Natfite
Series/Thickness	–

Large Diameter
NPS	36″
PSI	150#
Style	XR
Material	304ss/Natfite
Series	Series A

Winding Only (SX)
NPS	2 1/8″ x 3 1/8″
PSI	–
Style	SX
Material	304ss/Natfite
Thickness	1/8″ thick

Thickness available on custom made gaskets 1/8″, 3/16″, and 1/4″

Spiralwound Style Code
SX	Winding Only
SXI	Winding with Inner Ring
XR	Winding with Guide Ring
XRI	Winding with Guide and Inner Ring
XR-LP	Winding with Loop Centering Guide
HL	Winding with Loop Centering Guide
XH*	Winding Only
XMCR	Winding with Special (steel wound) Inner Ring

Non-metallic filler winding material
Natfite (Non-Asbestos)
Teflon
NS Teflon
Glass Filled Teflon
Ceramic
GTB Grafoil
GTA Grafoil

Stainless Steel Metal Winding Materials
340ss
304L
316L
321ss
347ss
410ss
Alloy 20
Hastelloy B
Hastelloy C
Inconel 600
Inconel 625
Inconel 750
Monel 400
Nickel 200
Titanium

Gasket Dimensions

ASME B16.20
(API 601)

ANSI B16.47 Series B (API 605)

Class 75-350
.

XR-RJ
(RTJ)

Other
.

Inner Ring Dimensions

ASME B16.20

ANSI B16.47 Series A (MSS-SP44)

ANSI B 16.47 Series B (API 605)

Style and Color Code

Stainless Steel Color Code
304ss	Yellow
304L	Yellow
316L	Green
321ss	Turquoise
347ss	Blue
410ss	No Color
Alloy 20	Black
Hastelloy B	Brown
Hastelloy C	Beige
Inconel 600	Gold
Incoloy 800	White
Monel 400	Orange
Nickel 200	Red
Titanium	Purple

Filler Material Color Code
Natfite (Aramid Fiber)	Pink
Teflon	White
N.S. Teflon	White
Glass Filled Teflon	No Color
Ceramic	Light Green
GTB Grafoil	Gray

Spiralwound Style Code
SX	Winding Only
SXI	Winding with Inner Ring
XR	Winding with Guide Ring
XRI	Winding with Guide and Inner Ring
XR-LP	Low Pressure Winding with Guide Ring
HL	Winding with Loop Centering Guide
XH *	Winding Only
XMCR	Winding with special(steel wound) Inner Ring

* Manhole or Hanhole gasket (specify shape)

Style XR and XRI Spiralwound gaskets are manufactured in accordance with all relevant gasket standards per flange designations of ASME/ANSI B16.5, B16.20, B16.47, (series A and B API 605 and MSS-SP44)

Temperature Limits

All technical advise and recommendation are rendered by Seller free of charge. While based on data believed to be reliable, seller assumes no responsibility.

Metallic Materials

Filler Materials

Weight

NPS Nominal Pipe Size

150#
NPS	150#
1/2”	1 oz
3/4”	1-1/2 oz
1”	2 oz
1 1/4”	2 oz
1 1/2”	2-1/2 oz
2”	3-1/2 oz
2 1/2”	5-1/2 oz
3”	6 oz
4”	8-1/2 oz
5”	9-1/4 oz
6”	10 oz
8”	1 lb
10”	1-1/4 lb
12”	1-1/2 lb
14”	2-1/4 lb
16”	2-1/2 lb
18”	2-3/4 lb
20”	3-1/2 lb
22”	3-3/4 lb
24”	3-3/4 lb
30”	6-1/2 lb
36”	8-1/2 lb
42”	10-1/2 lb
48”	12-1/2 lb

300#
NPS	300#
1/2”	1-1/2 oz
3/4”	2-1/2 oz
1”	2-1/2 oz
1 1/4”	3 oz
1 1/2”	4 oz
2”	4-1/2 oz
2 1/2”	6-1/2 oz
3”	7 oz
4”	9-1/2 oz
5”	12 oz
6”	1 lb
8”	1-1/2 lb
10”	1-3/4 lb
12”	2-1/4 lb
14”	3-1/2 lb
16”	4-1/4 lb
18”	5 lb
20”	6 lb
22”	6-3/4 lb
24”	7-1/2 lb
30”	10-1/2 lb
36”	12-1/2 lb
42”	14-1/2 lb
48”	16-1/2 lb

600#
NPS	600#
1/2”	1-1/2 oz
3/4”	2-1/2 oz
1”	2-1/2 oz
1 1/4”	3 oz
1 1/2”	4 oz
2”	4-1/2 oz
2 1/2”	6-1/2 oz
3”	7 oz
4”	14 oz
5”	1 lb
6”	1-1/2 lb
8”	2 lb
10”	3-1/8 lb
12”	4-1/4 lb
14”	4-1/2 lb
16”	5 lb
18”	6 lb
20”	7-1/2 lb
22”	8-1/4 lb
24”	9 lb
30”	12 lb
36”	15-1/2 lb
42”	17 lb
48”	19 lb

Tolerance Tables

Standard Inner Ring Tolerance
Size	I.D.		O.D.
Size	+	–	+	–
1″ to 3″	+ .0312	– .000	+ .0312	– .0312
4″ or larger	+ .0625	– .000	+ .0625	– .0625

XR Gaskets Tolerance Table (Gasket with container outer ring)
Size	I.D.		O.D.
Size	+	–	+	–
1/2″ to 8″	+ .0156	– .000	+ .0312	– .0312
10″ to 24″	+ .0312	– .000	+ .0312	– .0312
26″ to 60″	+ .0312	– .000	+ .0625	– .0625

Table of Standard Tolerance For Special Gaskets
Size	I.D.		O.D.
Size	+	–	+	–
Up to 1″	+ .0156	– .000	+ .000	– .0312
1″ to 24″	+ .0312	– .000	+ .000	– .0312
24″ to 36″	+ .0468	– .000	+ .000	– .0625
36″ to 60″	+ .0625	– .000	+ .000	– .0625

Special Inner Ring Tolerance
Size	I.D.		O.D.
Size	+	–	+	–
1″ to 3″	+ .0156	– .000	+ .0312	– .000
4″ or larger	+ .0312	– .000	+ .0625	– .000

Guide Rings Tolerance
Size	I.D.		O.D.
Size	+	–	+	–
1/2″ to 8″	+ .0312	– .312	+ .000	– .0312
10″ to 24″	+ .0625	– .0312	+ .000	– .0312
26″ to 60″	+ .0625	– .0625	+ .000	– .0312

Compression Table
Gasket Thickness	Maximum Flange Width	Optimum Compression Thickness
0.125	3/4″	.090-.100
0.175	3/4″	.125-.135
0.25	3/4″	.180-.200
0.285	3/4″	.200-.220

Note: 125-250 AARH is the optimum flange finish (Concentric or phonographic)