Page 48 - New Supercatalog Color.indd

C-47
Available Gasket Stress vs. Bolt Stress
300# Flat Face Flanges
This table is for information purposes only; see notes below
Bolt Stress Minimum Recommended
Nom. 30,000 psi 60,000 psi 75,000 psi Assembly Stress
Pipe Number Size Bolt Gasket Bolt Gasket Bolt Gasket 1/32" 1/16" 1/8"
Size of of Bolts Torque Stress Torque Stress Torque Stress Thick Thick Thick
(inches) Bolts (inches) (ft. lbs.) (psi) (ft. lbs.) (psi) (ft. lbs.) (psi) (psi) (psi) (psi)
0.5 4 0.50 30 1,632 60 3,264 75 4,081 4,800 5,400 6,400
0.75 4 0.63 60 1,650 120 3,300 150 4,125 4,800 5,400 6,400
1 4 0.63 60 1,506 120 3,013 150 3,766 4,800 5,400 6,400
1.25 4 0.63 60 1,328 120 2,656 150 3,319 4,800 5,400 6,400
1.5 4 0.75 100 1,428 200 2,857 250 3,571 4,800 5,400 6,400
2 8 0.63 60 1,924 120 3,848 150 4,810 4,800 5,400 6,400
2.5 8 0.75 100 2,124 200 4,247 250 5,309 4,800 5,400 6,400
3 8 0.75 100 1,798 200 3,597 250 4,496 4,800 5,400 6,400
3.5 8 0.75 100 1,525 200 3,051 250 3,813 4,800 5,400 6,400
4 8 0.75 100 1,226 200 2,453 250 3,066 4,800 5,400 6,400
5 8 0.75 100 1,099 200 2,198 250 2,748 4,800 5,400 6,400
6 12 0.75 100 1,341 200 2,682 250 3,352 4,800 5,400 6,400
8 12 0.88 160 1,357 320 2,714 400 3,393 4,800 5,400 6,400
10 16 1.00 245 1,928 490 3,855 613 4,819 4,800 5,400 6,400
12 16 1.13 355 1,841 710 3,682 888 4,602 4,800 5,400 6,400
14 20 1.13 355 1,808 710 3,615 888 4,519 4,800 5,400 6,400
16 20 1.25 500 1,924 1,000 3,847 1,250 4,809 4,800 5,400 6,400
18 24 1.25 500 2,016 1,000 4,031 1,250 5,039 4,800 5,400 6,400
20 24 1.25 500 1,728 1,000 3,457 1,250 4,321 4,800 5,400 6,400
24 24 1.50 800 1,909 1,600 3,818 2,000 4,773 5,000 5,600 6,400
26 28 1.63 1,100 2,562 2,200 5,124 2,750 6,405 — 6,171 7,171
28 28 1.63 1,100 2,272 2,200 4,544 2,750 5,680 — 6,193 7,193
30 28 1.75 1,500 2,491 3,000 4,982 3,750 6,228 — 6,247 7,247
32 28 1.88 2,000 2,703 4,000 5,406 5,000 6,758 — 6,299 7,299
34 28 1.88 2,000 2,493 4,000 4,987 5,000 6,234 — 6,336 7,336
36 32 2.00 2,200 3,058 4,400 6,115 5,500 7,644 — 6,378 7,378
38 32 1.50 800 2,921 1,600 5,841 2,000 7,301 — 7,365 8,365
40 32 1.62 1,100 3,026 2,200 6,052 2,750 7,566 — 7,286 8,286
42 32 1.62 1,100 2,878 2,200 5,756 2,750 7,194 — 7,378 8,378
44 32 1.75 1,500 3,077 3,000 6,155 3,750 7,693 — 7,369 8,369
46 28 1.88 2,000 2,800 4,000 5,600 5,000 7,000 — 7,323 8,323
48 32 1.88 2,000 3,119 4,000 6,237 5,000 7,796 — 7,441 8,441
50 32 2.00 2,200 3,287 4,400 6,574 5,500 8,217 — 7,428 8,428
52 32 2.00 2,200 3,156 4,400 6,311 5,500 7,889 — 7,506 8,506
54 28 2.25 3,180 3,095 6,360 6,190 7,950 7,737 — 7,372 8,372
56 28 2.25 3,180 2,981 6,360 5,963 7,950 7,453 — 7,443 8,443
58 32 2.25 3,180 3,346 6,360 6,693 7,950 8,366 — 7,552 8,552
60 32 2.25 3,180 3,230 6,360 6,460 7,950 8,075 — 7,623 8,623
Notes:
1 The values shown are not recommended values. The intent of this
table is to illustrate the relationship between bolt torque, bolt stress,
gasket stress, and how these three factors relate to the contact area of
ASME B16.5 & B16.47 Series A flat face flanges.
2 Full face gaskets will typically seal at stresses well below the minimum
recommended values shown. See also “Flanges” on page C-50.
3 Contact Garlock Applications Engineering at 1-800-448-6688 for
further discussions regarding the use of compressed non-asbestos,
GYLON® or GRAPH-LOCK® products in flat face flanges.
WARNING:
Properties/applications shown throughout this brochure are typical. Your specific applica-
tion should not be undertaken without independent study and evaluation for suitability.
For specific application recommendations consult Garlock. Failure to select the proper
sealing products could result in property damage and/or serious personal injury.
Performance data published in this brochure has been developed from field testing,
customer field reports and/or in-house testing.
While the utmost care has been used in compiling this brochure, we assume no respon-
sibility for errors. Specifications subject to change without notice. This edition cancels
all previous issues. Subject to change without notice.
GARLOCK is a registered trademark for packings, seals, gaskets, and other products
of Garlock.