Untitled Document

Cathodic Insulation Kits: Flange Specification


Gasket Specification Sheet

In order to manufacture your order correctly please fill out the following form.
Company Name    
Phone Number Fax Number
From Your Reference Number
Flange Specification (AWWA, MSS-SP44)  
Nominal Size Pressure Rating
Actual I.D. Flange O.D.
Number of Bolt Holes Bolt Hole Circle
Bolt Hole Diameter Bolt Size
Flange #1 Thickness Flange #2 Thickness
If flanges are not identical, you must specify both flange thickness for sleeve to fit properly

Note: Insulating Sleeve is designed to fit threaded studs. When using bolts with shanks, the sleeve may not slip over the shank and it may be nessesary to grind the shank to the diameter of the thread

Flange Insulation Specification

1"   |   1-1/4"   |   1-1/2"   |   2"   |   2-1/2"   |   3"   |   3-1/2"   |   4"   |   5"
6"   |   8"   |   10"   |   12"   |   14"   |   16"   |   18"   |   20"   |   24"


Kit Contents:

Each insulation kit contains an insulating gasket, insulating washers, steel washers and sleeves for each bolt or stud. Flange insulation gaskets are made in all sizes, pressure ratings and virtually all suitable materials.

The size and shape of each varies depending on the flange type, size and pressure.

All technical advice and recommendation are rendered by seller free of charge. While based on data believed to be reliable, seller assumes no responsibility.
*E & F Gaskets are made to ANSI Specifications unless otherwise specified
** Sleeves are full length as shown unless otherwise specified
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
1" 150
 R-15
 4-1/2
 1/2
 1-5/16
 9-16
 1-1/8
300
 R-16
 4-5/8
 5/8
 1-9/16
 11/16
 1-5/16
400,600
 R-16
 4-5/8
 5/8
 2-1/16
 11/16
 1-5/16
900,1500
 R-16
 4-7/8
 7/8
 2-15/16
 15/16
 1-3/4
2500 R-18 4-7/8 7/8 3-7/16 15/16 1-3/4
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
1-1/4" 150
 R-17
 4-1/2
 1/2
 1-7/16
 9/16
 1-1/8
300
 R-18
 4-5/8
 5/8
 1-11/16
 11/16
 1-5/16
400,600
 4-5/8
 5/8
 2-5/16
 11/16
 1-5/16
900,1500
 R-18
 4-7/8
 7/8
 2-15/16
 15/16
 1-3/4
2500 R-21 4-1 1 3-11/16 1-1/16 2
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
1-1/2" 150
 R-19
 4-1/2
 1/2
 1-9/16
 9/16
 1-1/8
300
 R-20
 4-3/4
 3/4
 1-13/16
 13/16
 1-9/16
400,600
 R-20
 4-3/4
 3/4
 2-7/16
 13/16
 1-9/16
900,1500
 R-20
 4-1
 1
 3-1/16
 1-1/16
 2
2500 R-23 4-1-1/8 1-1/8 4-3/16 1-3/16 2-3/16
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
2" 150
 R-22
 4-5/8
 5/8
 1-11/16
 11/16
 1-5/16
300
 R-23
 8-5/8
 5/8
 1-15/16
 11/16
 1-5/16
400,600
 R-23
 8-5/8
 5/8
 2-11/16
 11/16
 1-5/16
900,1500
 R-24
 8-7/8
 7/8
 3-11/16
 15/16
 1-3/4
2500 R-26 8-1 1 4-11/16 1-1/16 2
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
2-1/2" 150
 R-25
 4-5/8
 5/8
 1-15/16
 11/16
 1-5/16
300
 R-26
 8-3/4
 3/4
 2-3/16
 13/16
 1-9/16
400,600
 R-26
 8-3/4
 3/4
 2-15/16
 13/16
 1-9/16
900,1500
 R-27
 8-1
 1
 3-15/16
 1-1/16
 2
2500 R-28 8-1-1/8 1-1/8 5-3/16 1-3/16 2-3/16
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
3" 150
 R-29
 4-5/8
 5/8
 2-1/16
 11/16
 1-5/16
300
 R-31
 8-3/4
 3/4
 2-7/16
 13/16
 1-9/16
400,600
 R-31
 8-3/4
 3/4
 3-3/16
 13/16
 1-9/16
900
 R-31
 8-7/8
 7/8
 3-11/16
 15/16
 1-3/4
1500 R-35 8-1-1/8 1-1/8 4-7/16 1-3/16 2-3/16
2500 R-32 8-1-1/4 1-1/4 5-15/16 1-5/16 2-7/16
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
3-1/2" 150
 R-33
 8-5/8
 5/8
 2-1/16
 11-16
 1-5/16
300
 R-34
 8-3/4
 3/4
 2-9/16
 13/16
 1-9/16
400,600
 R-34
 8-7/8
 7/8
 3-7/16
 15/16
 1-3/4
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
4" 150
 R-36
 8-5/8
 5/8
 2-1/16
 11/16
 1-5/16
300
 R-37
 8-3/4
 3/4
 2-11/16
 13/16
 1-9/16
400
 R-37
 8-7/8
 7/8
 3-7/16
 15/16
 1-3/4
600 R-37 8-7/8 7/8 3-11/16 15/16 1-3/4
900 R-37 8-1-1/8 1-1/8 4-3/16 1-3/16 2-3/16s
1500 R-39 8-1-1/4 1-1/4 4-15/16 15/16 2-7/16
2500 R-38 8-1-1/2 1-1/2 6-11/16 1-9/16 2-7/8
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
5" 150
 R-40
 8-3/4
 3/4
 2-1/16
 13/16
 1-9/16
300
 R-41
 8-3/4
 3/4
 2-15/16
 13/16
 1-9/16
400
 R-41
 8-7/8
 7/8
 3-11/16
 15/16
 1-3/4
600 R-41 8-1 1 4-3/16 1-1/16 2
900 R-41 8-1-1/4 1-1/4 4-11/16 1-5/6 2-7/16
1500 R-44 8-1-1/2 1-1/2 6-7/16 1-9/16 2-7/8
2500 R-42 8-1-3/4 1-3/4 7-15/16 1-13/16 3-5/16
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
6" 150
 R-43
 8-3/4
 3/4
 2-3/16
 11/16
 1-9/16
300
 R-45
 12-3/4
 3/4
 3-1/16
 13/16
 1-9/16
400
 R-45
 12-7/8
 7/8
 3-15/16
 15/16
 1-3/4
600 R-45 12-1 1 4-7/16 1-1/16 2
900 R-45 12-1-1/8 1-1/8 5-1/16 1-3/16 2-3/16
1500 R-46 12-1-3/8 1-3/8 7-3/16 1-7/16 2-5/8
2500 R-47 8-2 2 9-3/16 2-1/16 3-3/4
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
8" 150
 R-48
 8-3/4
 3/4
 2-7/16
 13/16
 1-9/16
300
 R-49
 12-7/8
 7/8
 3-7/16
 15/16
 1-3/4
400
 R-49
 12-1
 1
 4-7/16
 1-1/16
 2
600 R-49 12-1-1/8 1-1/8 5-1/16 1-3/16 2-3/16
900 R-49 12-1-3/8 1-3/8 5-11/16 1-7/16 2-5/8
1500 R-50 12-1-5/8 1-5/8 7-15/16 1-11/16 3-1/16
2500 R-51 12-2" 2 10-11/16 2-1/16 3-3/4
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
10" 150
 R-52
 12-7/8
 7/8
 2-9/16
 15/16
 1-3/4
300
 R-53
 16-1
 1
 3-15/16
 1-1/16
 2
400
 R-53
 16-1-1/8
 1-1/8
 4-15/16
 1-3/16
 2-3/16
600 R-53 16-1-1/4 1-1/4 5-11/16 1-5/16 2-7/16
900 R-53 16-1-3/8 1-3/8 6-3/16 1-7/16 2-5/8
1500 R-54 12-1-7/8 1-7/8 9-3/16 1-15/16 3-1/2
2500 R-55 12-2-1/2 2-1/2 13-11/16 2-9/16 4-5/8
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
12" 150
 R-56
 12-7/8
 7/8
 2-11/16
 15/16
 1-3/4
300
 R-57
 16-1-1/8
 1-1/8
 4-3/16
 1-3/16
 2-3/16
400
 R-57
 16-1-1/4
 1-1/4
 5-3/16
 1-5/16
 2-7/16
600 R-57 20-1-1/4 1-1/4 5-15/16 1-5/16 2-7/16
900 R-57 20-1-3/8 1-3/8 6-15/16 1-7/16 2-5/8
1500 R-58 16-2 2 10-7/16 2-1/16 3-3/4
2500 R-60 12-2-3/4 2-3/4 15-3/16 2-13/16 5-1/16
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
14" 150
 R-59
 12-1
 1
 2-15/16
 1-1/16
 2
300
 R-61
 20-1-1/8
 1-1/8
 4-7/16
 1-3/16
 2-3/16
400
 R-61
 20-1-1/4
 1-1/4
 5-7/16
 1-5/16
 2-7/16
600 R-61 20-1-3/8 1-3/8 6-3/16 1-7/16 2-5/8
900 R-62 20-1-1/2 1-1/2 7-7/16 1-9/16 2-7/8
1500 R-63 16-2-1/4 2-1/4 11-3/16 2-5/16 4-3/16
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
16" 150
 R-64
 16-1
 1
 3-1/16
 1-1/16
 2
300
 R-65
 20-1-1/4
 1-1/4
 4-11/16
 1-5/16
 2-7/16
400
 R-65
 20-1-3/8
 1-3/8
 5-11/16
 1-7/16
 2-5/8
600 R-65 20-1-1/2 1-1/2 6-11/16 1-9/16 2-7/8
900 R-66 20-1-5/8 1-5/8 7-11/16 1-11/16 3-1/16
1500 R-67 16-2-1/2 2-1/2 12-3/16 2-9/16 4-5/8
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
18" 150
 R-68
 16-1-1/8
 1-1/8
 3-5/16
 1-3/16
 2-3/16
300
 R-69
 24-1-1/4
 1-1/4
 4-15/16
 1-5/16
 2-7/16
400
 R-69
 24-1-3/8
 1-3/8
 5-15/16
 1-7/16
 2-5/8
600 R-69 20-1-5/8 1-5/8 7-3/16 1-11/16 3-1/16
900 R-70 20-1-7/8 1-7/8 8-11/16 1-15/16 3-1/2
1500 R-71 16-2-3/4 2-3/4 13-7/16 2-13/16 5-1/32
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
20" 150
 R-72
 20-1-1/8
 1-1/8
 3-9/16
 1-3/16
 2-3/16
300
 R-73
 24-1-1/4
 1-1/4
 5-3/16
 1-5/16
 2-7/16
400
 R-73
 24-1-1/2
 1-1/2
 6-3/16
 1-9/16
 2-7/8
600 R-73 24-1-5/8 1-5/8 7-11/16 1-11/16 3-1/16
900 R-74 20-2 2 9-3/16 2-1/16 3-3/4
1500 R-75 16-3 3 14-11/16 3-1/16 5-1/2
Λ top
GASKETS SLEEVES ** WASHERS
Flange Size ASA ANSI* Lb Class "D" RTJ ASA Ring No Number and Bolt Size I.D.
(inches)		 Length
(inches)		 I.D.
(inches)		 O.D.
(inches)
24" 150
 R-76
 20-1-1/4
 1-1/4
 3-15/16
 1-5/16
 2-7/16
300
 R-77
 24-1-1/2
 1-1/2
 5-11/16
 1-9/16
 2-7/8
400
 R-77
 24-1-3/4
 1-3/4
 6-11/16
 1-13/16
 3-5/16
600 R-77 24-1-7/8 1-7/8 8-11/16 1-15/16 3-1/2
900 R-78 20-2-1/2 2-1/2 11-11/16 2-9/16 4-5/8
1500 R-79 16-3-1/2 3-1/2 16-11/16 3-9/16 6-3/8
Λ top