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Japanese Industrial Standard - JIS B2311-82.

The standard specifies steel butt-welding pipe fittings which are generally used for ordinary piping in JIS G3452, for steam, water, oil, gas, etc., at relatively low pressures.

buttwelddiagram_1.jpg

Materials : The fittings to this standard are made from materials in accordance with JIS G3452.

Pressure Ratings : The fittings are free from leakage at hydrostatic pressure up to a maximum of 2.5 MPa.

Welding End Preparations : Bevel dimensions and tolerances conform to those shown in the diagram. Fittings with a basic thickness below 4 mm have plain unbeveled ends.

Details of Buttweld Fittings to JIS B2311-82 (SGP - All Sizes are Welded)

 

 90° ELBOWS LONG RADIUS

Nominal Pipe Size
mm
Outside Diameter
OD
mm
SGP
A
Mass (kg)
(approx.)
90EL SGP
Inside Diameter
ID
Wall Thickness
T
15 21.7 16.1 2.8 38.1 0.08
20 27.2 21.6 2.8 38.1 0.10
25 34.0 27.6 3.2 38.1 0.15
32 42.7 35.7 3.5 47.6 0.25
40 48.6 41.6 3.5 57.2 0.35
50 60.5 52.9 3.8 76.2 0.63
65 76.3 67.9 4.2 95.3 1.12
80 89.1 80.7 4.2 114.3 1.58
90 101.6 93.2 4.2 133.4 2.11
100 114.3 105.3 4.5 152.4 2.91
125 139.8 130.8 4.5 190.5 4.49
150 165.2 155.2 5.0 228.6 7.09
200 216.3 204.7 5.8 304.8 14.40
*200 219.1 207.5 5.8 304.8 14.40
250 267.4 254.2 6.6 381.0 25.40
*250 273.0 259.8 6.6 381.0 25.40
300 318.5 304.7 6.9 457.2 38.10
*300 323.8 310.0 6.9 457.2 38.10
350 355.6 339.8 7.9 533.4 56.70
400 406.4 390.6 7.9 609.6 74.30
450 457.2 441.4 7.9 685.8 94.20
500 508.0 492.2 7.9 762.0 117.00
600 609.6 - - 914.4 -

 

90° ELBOWS SHORT RADIUS

Nominal Pipe Size
mm
Outside Diameter
OD
mm
SGP
A
Mass (kg)
(approx.)
90ES - SGP
Inside Diameter
ID
Wall Thickness
T
25 34.0 27.6 3.2 25.4 0.10
32 42.7 35.7 3.5 31.8 0.17
40 48.6 41.6 3.5 38.1 0.23
50 60.5 52.9 3.8 50.8 0.42
65 76.3 67.9 4.2 63.5 0.74
80 89.1 80.7 4.2 76.2 1.05
90 101.6 93.2 4.2 88.9 1.41
100 114.3 105.3 4.5 101.6 1.94
125 139.8 130.8 4.5 127.0 2.99
150 165.2 155.2 5.0 152.14 4.73
200 216.3 204.7 5.8 203.2 9.61
*200 219.1 207.5 5.8 203.2 9.61
250 267.4 254.2 6.6 254.0 16.90
*250 273.0 259.8 6.6 254.0 19.60
300 318.5 304.7 6.9 304.8 25.40
*300 323.8 310.0 6.9 304.8 25.40
350 355.6 339.8 7.9 355.6 37.80
400 406.4 390.6 7.9 406.4 -

 

45° ELBOWS LONG RADIUS

Nominal Pipe Size
mm
Outside Diameter
OD
mm
SGP
A
 
Mass (kg)
(approx.)
45EL - SGP
Inside Diameter
ID
Wall Thickness
T
B
15 21.7 16.1 2.8 38.1 15.8 0.04
20 27.2 21.6 2.8 38.1 15.8 0.05
25 34.0 27.6 3.2 38.1 15.8 0.07
32 42.7 35.7 3.5 47.6 19.7 0.13
40 48.6 41.6 3.5 57.2 23.7 0.18
50 60.5 52.9 3.8 76.2 31.6 0.32
65 76.3 67.9 4.2 95.3 39.5 0.56
80 89.1 80.7 4.2 114.3 47.3 0.79
90 101.6 93.2 4.2 133.4 55.3 1.06
100 114.3 105.3 4.5 152.4 63.1 1.46
125 139.8 130.8 4.5 190.5 78.9 2.25
150 165.2 155.2 5.0 228.6 94.7 3.54
200 216.3 204.7 5.8 304.8 126.2 7.20
*200 219.1 207.5 5.8 304.8 126.2 7.20
250 267.4 254.2 6.6 381.0 157.8 12.70
*250 273.0 259.8 6.6 381.0 157.8 12.70
300 318.5 304.7 6.9 457.2 189.4 19.00
*300 323.8 310.0 6.9 457.2 189.4 19.00
350 355.6 339.8 7.9 533.4 220.9 28.40
400 406.4 390.6 7.9 609.6 252.5 37.10
450 457.2 441.4 7.9 685.8 284.1 47.10
500 508.0 492.2 7.9 762.0 315.6 58.30
600 609.6 - - 914.4 378.7 -

 

WELDING REDUCERS CONCENTRIC AND ECCENTRIC

Nominal Pipe Size
mm
Outside Diameter
OD
mm
Length
L
mm
Mass
(approx.)
SGP - kg
 
Nominal Pipe Size
mm
 
Outside Diameter
OD
mm
Length
L
mm
 
 
Mass
(approx.)
SGP - kg
20 x 15 27.2 x 21.7  38.1 0.057   125 x 65   139.8 x 76.3 127.0  1.50 
25 x 20 34.0 x 27.2 50.8  0.110   150 x 125  165.2 x 139.8  139.7  2.55 
25 x 15 34.0 x 21.7 50.8  0.100   150 x 100  165.2 x 114.3  139.7  2.36 
32 x 25 42.7 34.0 50.8  0.154   150 x 90  165.2 x 101.6  139.7  2.27 
32 x 20 42.7 x 27.2 50.8  0.140   150 x 80  165.2 x 89.1  139.7  2.18 
32 x 15 42.7 x 21.7 50.8  0.129   150 x 65  165.2 x 76.3  139.7  2.09 
40 x 32 48.6 x 42.7 63.5  0.232   200 x 150  219.1 x 165.2  152.4  4.17 
40 x 25 48.6 x 34.0 63.5  0.209   200 x 125  219.1 x 139.8  152.4  3.87 
40 x 20 48.6 x 27.2 63.5  0.191   200 x 100  219.1 x 114.3  152.4  3.67 
50 x 40 60.5 x 48.6 76.2  0.364   200 x 90  219.1 x 101.6  152.4  3.57 
50 x 32 60.5 x 42.7 76.2  0.344   250 x 200  273.0 x 219.1  177.8  6.87 
50 x 25 60.5 x 34.0 76.2  0.315   250 x 150  273.0 x 165.2  177.8  6.32 
50 x 20 60.5 x 27.2 76.2  0.293   250 x 150  273.0 x 139.8  177.8  6.06 
65 x 50 76.3 x 60.5 88.9  0.594   300 x 250  323.8 x 273.0  203.2  9.97 
65 x 40 76.3 x 48.6 88.9  0.543   300 x 200  232.8 x 219.1  203.2  9.29 
65 x 32 76.3 x 42.7 88.9  0.518   300 x 150  323.8 x 165.2  203.2  8.69 
65 x 25 76.3 x 34.0 88.9  0.482   300 x 125  323.8 x 139.8 203.2  8.39 
80 x 65 89.1 x 76.3 88.9  0.725   350 x 300  355.6 x 323.8   330.2  21.20 
80 x 50 89.1 x 60.5 88.9  0.658   350 x 250   355.6 x 273.0 330.2  19.70 
80 x 40 89.1 x 48.6 88.9  0.611   350 x 200  355.6 x 219.1  330.2  18.30 
80 x 32 89.1 x 42.7 88.9  0.587   400 x 350   406.4 x 355.6 355.6  20.90 
90 x 80 101.6 x 89.1 101.6 0.961   400 x 300 406.4 x 323.8 355.6 19.80
90 x 65 101.6 x 76.3 101.6 0.899   400 x 250 406.4 x 273.0 355.6 18.20
90 x 50 101.6 x 60.5 101.6 0.826   450 x 400 457.2 x 406.4 381.0 26.30
90 x 40 101.6 x 48.6 101.6 0.771   450 x 350 457.2 x 355.6 381.0 24.50
100 x 90 114.3 x 101.6 101.6 1.170   450 x 300 457.2 x 323.8 381.0 23.30
100 x 80 114.3 x 89.1 101.6 1.100   500 x 450 508.0 x 457.2 508.0 40.00
100 x 65 114.3 x 76.3 101.6  1.040   500 x 400  508.0 x 406.4  508.0 37.60 
100 x 50 114.3 x 60.5 101.6 0.967   500 x 350 508.0 x 355.6 508.0 35.30
125 x 100 139.8 x 114.3 127.0 1.740   600 x 500 609.6 x 508.0 508.0 -
125 x 90 139.8 x 101.6 127.0 1.650   600 x 450 609.6 x 457.2 508.0 -
125 x 80 139.8 x 89.1 127.0 1.580          

 

TEES EQUAL AND UNEQUAL

Nominal Pipe Size
mm
Outside Diameter
OD
mm
SGP
A
B
Mass (kg)
(approx.)
Inside Diameter
ID
Wall Thickness
T
15 21.7 16.1 2.8 25.4 25.4 0.085
20 27.2 21.6 2.8 28.6 28.6 0.122
25 34.0 27.6 3.2 38.1 38.1 0.236
32 42.7 35.7 3.5 47.6 47.6 0.441
40 48.6 41.6 3.5 57.2 57.2 0.573
50 60.5 52.9 3.8 63.5 63.5 0.851
65 76.3 67.9 4.2 76.2 76.2 1.42
80 89.1 80.7 4.2 85.7 85.7 1.87
90 101.6 93.2 4.2 95.3 95.3 2.37
100 114.3 105.3 4.5 104.8 104.8 3.13
125 139.8 130.8 4.5 123.8 123.8 4.53
150 165.2 155.2 5.0 142.9 142.9 6.84
200 219.1 207.5 5.8 177.8 177.8 12.80
250 273.0 259.8 6.6 215.9 215.9 21.8
300 323.8 310.0 6.9 254.0 254.0 32.0
350 355.6 339.8 7.9 279.4 279.4 44.7
400 406.4 390.6 7.9 304.8 304.8 55.2
450 457.2 441.4 7.9 342.9 342.9 70.0
500 508.0 492.2 7.9 381.0 381.0 86.6

WELDING CAPS

Nominal Pipe Size
mm
Outside Diameter
OD
mm
SGP
E
Mass (kg)
(approx.)
SGP
Inside Diameter
ID
Wall Thickness
T
50 60.5 52.9 3.8 38.1 0.228
65 76.3 67.9 4.2 38.1 0.339
80 89.1 80.7 4.2 50.8 0.507
90 101.6 93.2 4.2 63.5 0.706
100 114.3 105.3 4.5 63.5 0.877
125 139.8 130.8 4.5 76.2 1.29
150 165.2 155.2 5.0 88.9 1.99
200 219.1 207.5 5.8 101.6 3.61
250 273.0 259.8 6.6 127.0 6.33
300 323.8 310.0 6.9 152.4 9.43
350 355.6 339.8 7.9 165.1 13.2
400 406.4 390.6 7.9 177.8 16.6
450 457.2 441.4 7.9 203.2 21.2
500 508.0 492.2 7.9 228.6 26.4

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