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850 and 950 Series

North America Only

Table 1. Torque Specifications - Raised Face Flange, Steel Only

NOMINAL PIPE DIAMETER NUMBER OF BOLTS BOLT DIAMETER, IN. TORQUE, FT-LBS

1 4 0.50 9

1-1/4 4 0.50 13

1-1/2 4 0.50 18

2 4 0.63 35

2-1/2 4 0.63 41

3 4 0.63 60

3-1/2 8 0.63 34

4 8 0.63 43

6 8 0.75 80

8 8 0.75 109

10 12 0.88 101

12 12 0.88 135

14 12 1.00 168

16 16 1.00 159

18 16 1.13 244

20 20 1.13 214

24 24 1.25 253

Assumptions: Use of SAE grade 5 bolts or studs or stronger. No lubricant. Compressed mineral ber material or similar.

Notes: If lubricant is used on bolts, apply torque reduction factor listed in Table 3. For best results, hardened steel washers should be used on all cast ange bolted connections.

Table 2. Torque Specifications - Flat Face Flange, Steel or Aluminum

NOMINAL PIPE DIAMETER NUMBER OF BOLTS BOLT DIAMETER, IN. TORQUE, FT-LBS

1 4 0.50 14

1-1/4 4 0.50 16

1-1/2 4 0.50 18

2 4 0.63 32

2-1/2 4 0.63 43

3 4 0.63 47

3-1/2 8 0.63 26

4 8 0.63 32

6 8 0.75 49

8 8 0.75 68

10 12 0.88 69

12 12 0.88 98

14 12 1.00 138

16 16 1.00 125

18 16 1.13 142

20 20 1.13 135

24 24 1.25 156

8 API 16 0.50 20

20 API 16 0.63 75

24 API 20 0.63 75

Assumptions: Use of SAE grade 5 bolts or studs or stronger. No lubricant. Elastomer <70 Durometer Shore A.

Notes: Flat faced anges should never be mated to a raised face ange for installation. If lubricant is used on bolts, apply torque reduction factor listed in Table 3. For best results,

hardened steel washers should be used on all cast ange bolted connections.

Table 3. Torque Reduction Factors per Lubricant

DESCRIPTION COEFFICIENT OF FRICTION MULTIPLY TORQUE VALUE IN TABLE BY

Machine Oil f = 0.15 0.75

API SA2 Grease f = 0.12 0.60

Nickel-based Lubricant f = 0.11 0.55

Copper-based Lubricant f = 0.10 0.50

Heavy-Duty Lubricating Paste f = 0.06 0.30