90＜,45＜ ELBOWS AND RETURN BENDS


　

　

　

BS 1965 Part 1

Carbon Steel

　

　

　

Nominal  size  of fitting

  OD     at ends

Thickness

  LONG RADIUS ELBOW

 90＜Elbow

45＜Elbow

Return bend

Centre to end  A Centre to end  B Centre to centre  O

Back to face  K

in

1

11/6

2

21/2

3

31/2

4

5

6(61/2o.d)

6(63/2o.d)

8

10

12

14

16

in

111/32

111/36

129/32

22/3

3

31/2

4

41/2

51/2

61/2

65/8

103/4

123/4

14

16

in

0.128

0.128

0.128

0.144

0.144

0.160

0.160

0.176

0.192

0.192

0.212

0.250

0.281

-

-

in

-

-

0.160

0.176

0.176

0.192

0.192

0.212

0.212

0.212

0.250

0.250

0.312

0.375

0.375

in

-

-

-

-

-

-

-

-

-

0.281

0.312

0.375

0.375

0.438

0.500

in

11/2

17/6

21/4

3

33/4

41/2

51/4

6

71/2

9

9

12

15

18

21

24

in

7/8

1

11/8

13/8

13/4

2

21/4

21/2

31/8

33/4

33/4

5

61/4

71/2

83/4

10

in

3

33/4

41/2

6

71/2

9

101/2

12

15

18

18

24

30

36

-

-

in

23/16

23/4

31/4

43/1

51/4

61/4

71/4

81/4

101/4

121/4

125/16

165/16

203/8

243/8

-

-

    BS Tolerance (carbon)

           Tolerances on Thickness

     The actual thickness of fittings at any point shall be not less than 871/2  percent of the specified thickness.

                                    TOLERANCES ON OUTSIDE                       TOLERANCES ON BORE AT ENDS  

    Table  10                 DIAMETER AT ENDS OF FITTING         Table  11     OF FITTING

      Nominal size fitting

Tolerances

Nominal size fitting

Tolerances

in

Up to and include 11/4

in

+1/32

-1/64

in

Up to and include 21/2

in

＼ 1/32

11/2 up to and including 21/2

  +1/16

-1/32

3 up to and including 8

in

＼ 1/16

3 up to and including 4

+1/16

-1/16

10 up to and including 16

in

＼ 1/8

5 up to and including 4

+3/32

-1/16

 　 　

10 up to and including 16

　+5/32

-1/8

 　 　

　
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