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ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
174
9.3 Inspecting and Cleaning Barrier Diaphragms, Continued
Torque ratings
Table 54 lists process head bolt torque ratings for given transmitter type.
Table 54 Process Head Bolt Torque Ratings
Bolting Type Meter Body
Type
Process Head
Bolting Size
Carbon Steel –
Standard; no option
specified
B7M Bolting
[“B7” Option]
Stainless Steel NACE
[“CR” Option]
316 Stainless Steel
Non-NACE [“SS”
Option]
7/16 x 14 UNC 20,3 N-m +/- 1,0 N-m
[15.0 Lb-Ft +/- 0.8 Lb-Ft]
20,3 N-m +/- 1,0 N-m
[15.0 Lb-Ft +/- 0.8 Lb-Ft]
20,3 N-m +/- 1,0 N-m
[15.0 Lb-Ft +/- 0.8 Lb-Ft]
20,3 N-m +/- 1,0 N-m
[15.0 Lb-Ft +/- 0.8 Lb-Ft]
7/16 x 20 UNF NA NA 25,8 N-m +/- 1,3 N-m
[19.0 Lb-Ft +/- 1.0 Lb-Ft]
NA
Draft Range
Transmitter
M12 x 1.75 25,8 N-m +/- 1,3 N-m
[19.0 Lb-Ft +/- 1.0 Lb-Ft]
NA NA NA
M12 x 1.75 63,7 N-m +/- 3,2 N-m
[47.0 Lb-Ft +/- 2.4 Lb-Ft]
NA NA NA
7/16 x 20 UNF NA NA 63,7 N-m +/- 3,2 N-m
[47.0 Lb-Ft +/- 2.4 Lb-Ft]
NA
7/16 x 14 UNC 67,8 N-m +/- 3,4 N-m
[50.0 Lb-Ft +/- 2.5 Lb-Ft]
48,8 N-m +/- 2,4 N-m
[36.0 Lb-Ft +/- 1.8 Lb-Ft]
56,9 N-m +/- 2,8 N-m
[42.0 Lb-Ft +/- 2.1 Lb-Ft]
56,9 N-m +/- 2,8 N-m
[42.0 Lb-Ft +/- 2.1 Lb-Ft]
3/8 x 16 UNC 39,3 N-m +/- 2,0 N-m
[29 Lb-Ft +/- 1.5 Lb-Ft]
NA 39,3 N-m +/- 2,0 N-m
[29 Lb-Ft +/- 1.5 Lb-Ft]
39,3 N-m +/- 2,0 N-m
[29 Lb-Ft +/- 1.5 Lb-Ft]
M8 x 1.25 27,1 N-m +/- 1,4 N-m
[20.0 Lb-Ft +/- 1.0 Lb-Ft]
NA NA NA
All Other DP,
GP and AP
Transmitters
5/16 x 18 UNC NA NA 20,3 N-m +/- 1,0 N-m
[15.0 Lb-Ft +/- 0.8 Lb-Ft]
20,3 N-m +/- 1,0 N-m
[15.0 Lb-Ft +/- 0.8 Lb-Ft]