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Long Weld Neck - Class 600





NOMINAL
SIZE
AND BORE
J
OUTSIDE
DIA.


O
MINIMUM
FLANGE
THICKNESS

Q
DIA. OF
RAISED
FACE

R
MINIMUM
WALL
THICKNESS
DIA. OF
HUB AT
POINT OF
WELDING
H
LENGTH
THROUGH
HUB

Y
0.5 3.75 0.56 1.38 0.50 1.50 9
0.75 4.62 0.62 1.69 0.56 1.88 9
1 4.88 0.69 2.00 0.56 2.12 9
1.25 5.25 0.81 2.50 0.62 2.50 9
1.5 6.12 0.88 2.88 0.62 2.75 9
2 6.50 1.00 3.62 0.62 3.25 9
2.5 7.50 1.12 4.12 0.72 3.94 9
3 8.25 1.25 5.00 0.81 4.62 9
3.5 9.00 1.38 5.50 0.88 5.25 9
4 10.75 1.50 6.19 1.00 6.00 12
5 13.00 1.75 7.31 1.25 7.50 12
6 14.00 1.88 8.50 1.38 8.75 12
8 16.50 2.19 10.62 1.38 10.75 12
10 20.00 2.50 12.75 1.75 13.50 12


- DRILLING TEMPLATE APPROX.
WEIGHT
IN
POUNDS
NOMINAL SIZE
AND BORE
J
NO.
OF
HOLES
DIA.
OF
HOLES
DIA.
OF
BOLTS
DIA.
BOLT
CIRCLE
0.5 4 0.62 0.5 2.62 11
0.75 4 0.75 0.62 3.25 11
1 4 0.75 0.62 3.5 11
1.25 4 0.75 0.62 3.88 14
1.5 4 0.88 0.75 4.5 17
2 8 0.75 0.62 5 21
2.5 8 0.88 0.75 5.88 29
3 8 0.88 0.75 6.62 38
3.5 8 1 0.88 7.25 48
4 8 1 0.88 8.5 80
5 8 1.12 1 10.5 128
6 12 1.12 1 11.5 158
8 12 1.25 1.12 13.75 215
10 16 1.38 1.25 17 339


Necks are furnished machined all over.
Unless otherwise specified, Class 600 Seamless Long Weld Necks will be furnished drilled and with a 0.25¡± raised face
which is not included in thickness ¡°Q¡± but is included in Length ¡°Y¡±.
Long Weld Necks conform in every particular to the requirements of the latest API/ASME Code.
Other lengths available upon request.

                          LONG WELD NECK FLANGES ARE ALSO AVAILABLE IN
                                              CLASSES 400, 900, 1500 & 2500.