ASTM A193 MINIMUM TENSILE YIELD

ELONGATION REDUCTION
ASTM A320 TEMPERING STRENGTH STRENGTH HARDNESS
2" (50mm) OF AREA MIN.
TEMP. MIN. KSI MIN. KSI MAXIMUM
MIN. % %
GRADE SIZE °F (°C) (MPA) (MPA)

2-1/2” & 321 HB

1100 (593) 125 (860) 105 (725) 16 50
under (35HRC)

B7

over 2-1/2” 321 HB

16
1100 (593) 115 (790) 95 (655) 16 50
to 4” (35HRC)
MECHANICAL REQUIREMENTS—TABLE 1

2-1/2” & 235 HB

1150 (620) 100 (690) 80 (550) 18 50
under (99HRB)
B7M
Note 1
over 2-1/2” 235 HB
1150 (620) 100 (690) 80 (550) 18 50
to 4” (99HRB)
 ASTM A193 MINIMUM TENSILE YIELD
ELONGATION REDUCTION
ASTM A320 TEMPERING STRENGTH STRENGTH HARDNESS
2" (50mm) OF AREA MIN.
TEMP. MIN. KSI MIN. KSI MAXIMUM
MIN. % %
GRADE SIZE °F (°C) (MPA) (MPA)

Quenched 50 -
2-1/2" & and
L7 125 (860) 105 (725) 16
under Tempered
1100 (593)

17
Quenched
L7M 2-1/2" & and 235 HB
100 (690) 80 (550) 18 50
Note 4 under Tempered (99HRB)
1150 (620)
MECHANICAL REQUIREMENTS—TABLE 2
 ASTM A193 MINIMUM TENSILE YIELD
ELONGATION REDUCTION
ASTM A320 TEMPERING STRENGTH STRENGTH HARDNESS
2" (50mm) OF AREA MIN.
TEMP. MIN. KSI MIN. KSI MAXIMUM
MIN. % %
GRADE SIZE °F (°C) (MPA) (MPA)

B8 Carbide
All 223 HB
Class 1 Solu$on 75 (515) 30 (205) 30 50
Diameters (96HRB)
Note 2, 3 Treated

18
3/4” &
125 (860) 100 (690) 12 35
under
Carbide
over 3/4”
Solu$on 115 (790) 80 (550) 15 35
MECHANICAL REQUIREMENTS—TABLE 3

B8 to 1”
Treated 321 HB
Class 2
& (35HRC)
Note 2 over 1” to
Strain 105 (725) 65 (450) 20 35
1-1/4”
Hardened
over 1-1/4”
100 (690) 50 (345) 28 45
to 1-1/2"
 ASTM A193 MINIMUM TENSILE YIELD
ASTM A320 ELONGATION REDUCTION
TEMPERING STRENGTH STRENGTH HARDNESS
2" (50mm) OF AREA MIN.
TEMP. MIN. KSI MIN. KSI MAXIMUM
MIN. % %
GRADE SIZE °F (°C) (MPA) (MPA)

B8M Carbide
All 223 HB
Class 1 Solu$on 75 (515) 30 (205) 30 50
Diameters (96HRB)
Note 2, 3 Treated

3/4” &

19
110 (760) 95 (655) 15 45
under

over 3/4” Carbide

100 (690) 80 (550) 20 45
to 1” Solu$on
B8M
Treated 321 HB
Class 2 over 1” to
& 95 (655) 65 (450) 25 45 (35HRC)
Note 2 1-1/4”
Strain
Hardened
over 1-
1/4” to 1- 90 (620) 50 (345) 30 45
1/2"
MECHANICAL REQUIREMENTS—TABLE 4
MECHANICAL REQUIREMENTS—TABLE 5

ASTM A-194 MINIMUM ROCKWELL

ASME SA-194 TEMPERING BRINELL HARNDESS

GRADE CLASS AND SIZE TEMP °F (°C) HARDNESS C SCALE B SCALE

2H Up to and
248 - 327 24 - 35
including 1-1/2" 850 (455) 95 min.

Over 1-1/2" 212 - 327 35 max.

2HM All Sizes 1150 (620) 159 - 235 84 to 99

L7M All Sizes 1150 (620) 159 - 235 84 to 99

7L All Sizes 1100 (595) 248 - 327 24 - 35

B8 & B8M All Sizes 126 - 300 32 max 60 min

* In order to meet the tensile requirements, the hardness shall be no

less than 200 HB or 93 HRB .

20
MECHANICAL REQUIREMENTS—TABLE 6
Impact Energy Absorp on Requirements

Bol$ng for Low-Temperature Service

ASTM A320 | A320M MINIMUM AVERAGE

TEST IMPACT VALUE FOR

GRADE TEMP. °F (°C) EACH SET OF 3 SAMPLES

10 x 10 x 50mm

K. - lbs. (Joules)

L7 -150 (-101) 20 (27)

L7M -100 (-73) 20 (27)

L43 -150 (-101) 20 (27)

21
 Iden fica on Nominal Size Mechanical Proper es

Grade Mark Specifica on Material Range (in.) Yield Tensile Hardness

Proof
Strength Strength
Load
Min Min
(psi) Min Max
(psi) (psi)

ASTM A193 1/4 to 2-1/2 -- 105,000 125,000

321 HB or
B7
AISI 4140, -- 35 HRC
Grade B7 Over 2-1/2 to 4 -- 95,000 115,000
4142, OR
B7 Over 4 to 7 -- 75,000 100,000
4105
Quenched 235 HB or
ASTM A193 1/4 to 4 -- 80,000 100,000

22
and 99 HRC
B7M --
Tempered 235 BHN
GRADE B7M Over 4 to 7 -- 75,000 100,000 or
B7M 99 HRB
FASTENER IDENTIFICATION MARKINGS

ASTM A320
AISI 4140,
L7 1/4 to 2-1/2 -- 105,000 125,000 --
4142, OR
Grade L7
L7 4105 --
Quenched
ASTM A320
and 235 HB or
L7M
Tempered --
99 HRB
Grade L7M 1/4 to 2-1/2 -- 80,000 100,000
L7M
 Iden fica on Nominal Size Mechanical Proper es

Grade Mark Range (in.) Proof Yield Tensile Hardness

Specifica on Material Strength Strength
Load
Min Min
(psi) (psi) (psi) Min Max

2-1/2 and
ASTM A193 105,000 125,000
B16
CrMoVa under 321 BH or
--
Grade B16 Alloy Steel Over 2-1/2 to 4 95,000 115,000 35 HRC
B16 Over 4 to 8 85,000 100,000
ASTM A193
B8
223 BH or
Grade B8 AISI 304 --
96 HRB
B8 Class 1

23
1/4 and larger -- 30,000 75,000
ASTM A193
223 BH or
B8M
Grade B8M AISI 316 --
96 HRB
B8M Class 1
ASTM A193 AISI 304 1/4 to 3/4 -- 100,000 125,000
B8SH
321 HB or
Grade B8 Strain Over 3/4 to 1 -- 80,000 115,000 --
35 HRC
B8SH Class 2 Hardened Over 1 to 1-1/4 -- 65,000 105,000
ASTM A193 1/4 to 3/4 -- 95,000 110,000
Grade B8M AISI 316 Over 3/4 to 1 -- 80,000 100,000
321 HB or
B8MSH Class 2 Strain Over 1 to 1-1/4 -- 65,000 95,000 --
35 HRC
Hardened Over 1-1/4 to 1
50,000 90,000
FASTENER IDENTIFICATION MARKINGS

B8MSH -1/2
 Iden fica on Nominal Size Mechanical Proper es

Grade Mark Specifica on Material Range (in.) Hardness

Yield Tensile
Proof
Strength Strength
Load
Min Min
(psi)
(psi) (psi)
Min Max

ASTM A325 Medium 1/2 to 1 85,000 92,000 120,000 24 HRC 35 HRC

24
Carbon Steel,
Quenched
and
Type 1 Tempered 1-1/8 to 1-1/2 74,000 81,000 105,000 19 HRC 31 HRC
FASTENER IDENTIFICATION MARKINGS

A325

Low Carbon
ASTM A325 Martensi$c
Steel,
1/2 to 1 85,000 92,000 120,000 24 HRC 35 HRC
Quenched
Type 2 and
Tempered
A325
 Atmospheric
ASTM A325 Corrosion 1/2 to 1 85,000 92,000 120,000 24 HRC 35 HRC
Resis$ng
Steel,
Quenched
Type 3 and Tem- 1-1/8 to 1-1/2 74,000 81,000 105,000 19 HRC 31 HRC
pered
A325

ASTM A354 1/4 to 2-1/2 105,000 109,000 125,000

26 HRC 36 HRC

25
Grade BC 2-3/4 to 4 95,000 99,000 115,000
22 HRC 33 HRC

BC
 Iden fica on Nominal Size Mechanical Proper es

Grade Mark Specifica on Material Range (in.) Yield Tensile Hardness

Proof
Strength Strength
Load
Min Min
(psi)
(psi) (psi)
Min Max

SAE J429 Low or

26
Medium 1/4 to 1-1/2 33,000 36,000 70 HRB 100 HRB
Grade 1 Carbon Steel

60,000
ASTM A307 A - 69 A - 100
FASTENER IDENTIFICATION MARKINGS

Low Carbon HRB HRB

No Grade Mark 1/4 to 4 -- --
Steel
Grades A&B B - 69 B - 95
HRB HRB

SAE J429 Low or 1/4 to 3/4 55,000 57,000 74,000 80 HRB 100 HRB
Medium
Carbon Steel Over 3/4 to
Grade 2 33,000 36,000 60,000 70 HRB 100 HRB
1-1/2
 SAE J429 1/4 to 1 85,000 92,000 120,000 25 HRC 34 HRC

Grade 5 Over 1 to 1-1/2 74,000 81,000 105,000 19 HRC 30 HRC

SAE J429
Medium
Carbon Alloy
Grade 8
Steel,
1/4 to 1-1/2 120,000 130,000 150,000 33 HRC 39 HRC
Quenched
ASTM A354 and

27
Tempered
Grade BD

Alloy Steel, 150,000

Quenched min
ASTM A490 1/2 to 1-1/2 120,000 130,000 33 HRC 38 HRC
and 170,000
Tempered max
A490
FASTENER IDENFICIATION MARKING

NOTES:
1. In addi$on to the indicated grade marking, all grades included in this
table must be marked for manufacturer iden$fica$on.
2. While hex heads are shown, grade markings apply equally to products
with other head configura$ons.
3. Hardness value are Brinell.
4. A325 Type 1 bolts may also be marked with 3 radial lines 120 degrees
apart in addi$on to the A325 marking.
5. The bolt manufacturer, at his op$on, may add other markings to
indicate the use of atmospheric corrosion resistant steel.
6. A354 Grade BD products, in sizes 1-1/2” and smaller, are iden$fied as
shown and, at the manufacturer’s op$on, may have the leBers BD added.
Larger sizes are marked only BD.
7. Specifica$ons:
SAE J429 Mechanical and material requirements for externally threaded
fasteners
ASTM A307 Carbon steel externally threaded standard fasteners
ASTM A449 Quenched and tempered steel bolts and studs
ASTM 325 High strength bolts for structural steel joints
ASTM A354 Quenched and tempered alloy steel bolts, studs and other
externally threaded fasteners
ASTM A490 Heat treated steel structural bolts, 150 ksi minimum tensile
strength
ASTM A193-B7 Quenched and tempered alloy steel heavy hex bolts

28
 STUD & BOLT THREAD PITCHES

BOLT STUD UN BOLT UNC BOLT UNF WRENCH

DIAMETER THREADS THREADS THREADS SIZES
(Inches) (Inches) (Inches) (Inches) (Heavy Hex)
1/4" 20 20 28
5/16" 18 18 24
3/8" 16 16 24
7/16" 14 14 20
1/2" 13 13 20 7/8
9/16" 12 12 18
5/8" 11 11 18 1-1/16
3/4" 10 10 16 1-1/4
7/8" 9 9 14 1-7/16
1" 8 8 12 1-5/8
1-1/8" 8 7 12 1-13/16
1-1/4" 8 7 12 2
1-3/8" 8 6 12 2-3/16
1-1/2" 8 6 2-3/8
1-5/8" 8 Not Defined 2-9/16
1-3/4" 8 5 2-3/4
1-7/8" 8 Not Defined 2-15/16
2" 8 4-1/2 3-1/8
2-1/4" 8 4 3-1/2
2-1/2" 8 4 3-7/8
2-3/4" 8 4 4-1/4
3" 8 4 4-5/8
3-1/4" 8 4 5
3-1/2" 8 4
3-3/4" 8 4
4" 8 4
29
MEASUREMENT INFORMATION

Measurement Ordering Informa on:

We suggest conforming to the Industrial Fasteners Ins$tute®

measures as shown above, known as first-thread-to-first-thread
measurement (L). Flat chamfer points are not included in this
measurement. Ordering by overall length is known as end-to-end
measurement as should be clearly specified when ordering. Hex
Bolts are measured from under the head to the $p of the bolt.

Tolerances on Stud Bolt Lengths:

All our studs have been manufactured according to the

requirements of ANSI standard B16.5, as outlined by the Industrial
Fasteners Ins$tute®. The length Tolerances are as follows:

Length in Inches Tolerances in Inches

Lengths up to 12” + or - 1/16

Lengths over 12” + or - 1/8

30
The stud bolt theore$cal length can be calculated by means of the for-
mula: L = 2 (s + n + h + rf) + g

• s = free threads (equals 1/3

$me bolt diameter)

• n = nut thickness (equals

nominal bolt diameter)

• h = flange thickness

• rf = height of raised face for

class 150 and class 300
height of raised face is
included in h height

• g = gasket thickness
approximately 1/8”

31
 U-BOLT WASHERS

Outside Inside Approx. Approx.

Bolt Size Thickness
Diameter Diameter per M Pcs per Carton
3/8 0.813 0.406 0.138 15.3 3,500
7/16 0.922 0.469 0.138 20 2,700
1/2 1.125 0.526 0.187 42 1,300
9/16 1.187 0.593 0.187 44.2 1,200
5/8 1.25 0.656 0.187 48 1,100
3/4 1.375 0.781 0.187 54 950
7/8 1.5 0.906 0.187 60 830
1 1.625 1.031 0.187 66 680
1 1/8 2.25 1.156 0.25 208 250
1 1/4 2.25 1.312 0.25 186 220

SAE WASHERS
Approx. Approx.
Bolt Size Outside Inside SAE Thick-
Lbs. pcs
ness
Diameter Diameter per M Pcs per Carton
1/2 1.063 0.531 .074/.121 17.8 2,800
5/8 1.313 0.656 .074/.121 27.1 1,850
3/4 1.469 0.813 .108/.160 44.7 1,050
7/8 1.75 0.938 .108/.160 64.6 775
1 2 1.063 .108/.160 85 585
1 1/8 2.25 1.25 .108/.160 109 460
1 1/4 2.5 1.375 .136/.192 151 335
1 3/8 2.75 1.5 .136/.192 181 275
1 1/2 3 1.625 .136/.192 212 230
32
 F436 WASHERS
Approx. Approx.
Outside Inside F436 Thick-
Bolt Size Lbs. pcs
ness
Diameter Diameter per M Pcs per Carton
1/2 1.063 0.531 .097/.177 20 2,500
5/8 1.313 0.688 .122/.177 35 1,250
3/4 1.469 0.813 .122/.177 41.2 1,125
7/8 1.75 0.938 .136/.177 71 625
1 2 1.063 .136/.177 93.8 500
1 1/8 2.25 1.188 .136/.177 120 375
1 1/4 2.5 1.375 .136/.177 144 300
1 3/8 2.75 1.531 .136/.177 174 275
1 1/2 3 1.625 .136/.177 208 250
1 5/8 3.25 1.77 .178/.280 311 150
1 3/4 3.375 1.875 .178/.280 328 130
1 7/8 3.5 2 .178/.280 345 135
2 3.75 2.125 .178/.280 398 100
2 1/4 4 2.407 .240/.340 568 60
2 1/2 4.5 2.657 .240/.340 734 30
2 3/4 5 2.907 .240/.340 921 30
3 5.5 3.157 .240/.340 1129 30

33
TYPE 137 STANDARD PIPE DIMENSIONS
Material Approx.
Pipe Size C L T
Diameter wt. per 100
1/2" 1/4" 15/16 3 1/4 2 3/8 7.4
3/4" 1/4" 1 1/8 3 5/16 2 3/8 7.7
1" 1/4" 1 3/8 3 7/16 2 3/8 8.1
1/2" 3/8" 15/16 3 1/4 2 3/8 19
3/4" 3/8" 1 1/8 3 5/16 2 3/8 19.7
1" 3/8" 1 3/8 3 7/16 2 3/8 21
1 1/4" 3/8" 1 11/16 3 3/4 2 3/8 22.5
1 1/2" 3/8" 2 4 2 1/2 24.3
2" 3/8" 2 7/16 4 1/2 2 1/2 27.3
2 1/2" 1/2" 2 15/16 5 1/4 3 57.3
3" 1/2" 3 9/16 5 13/16 3 63.5
3 1/2" 1/2" 4 1/16 6 5/16 3 69.4
4" 1/2" 4 9/16 6 13/16 3 74.9
5" 1/2" 5 5/8 7 13/16 3 86.7
6" 5/8" 6 3/4 9 1/2 3 3/4 162
8" 5/8" 8 3/4 11 1/2 3 3/4 200.4
10" 3/4" 10 7/8 13 13/16 4 364.6
12" 7/8" 12 7/8 16 1/16 4 1/4 561.7
14" 7/8" 14 1/8 17 5/16 4 1/4 619.8
16" 7/8" 16 1/8 19 5/16 4 1/4 676.6
18" 1" 18 1/8 21 11/16 4 3/4 1040
20" 1" 20 1/8 23 11/16 4 3/4 1130
24" 1" 24 1/8 27 11/16 4 3/4 1330
30" 1" 30 1/8 33 11/16 4 3/4 1620
36" 1" 36 1/8 39 11/16 4 3/4 1900
34
AVAILABLE MATERIALS

• Plain Finish

• Zinc Plated

• Stainless Steel

• Above U-Bolts furnished with 2 nuts assembled.

• Rubber Coated available upon request.

35
ANSI B16.5 BOLTING CHART

ANSI 150 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.
1/2 1/2 4 2 1/4 - -
3/4 1/2 4 2 1/2 - -
1 1/2 4 2 1/2 3 R15
1 1/4 1/2 4 2 3/4 3 1/4 R17
1 1/2 1/2 4 2 3/4 3 1/4 R19
2 5/8 4 3 1/4 3 3/4 R22
2 1/2 5/8 4 3 1/2 4 R25
3 5/8 4 3 1/2 4 1/4 R29
3 1/2 5/8 8 3 1/2 4 1/4 R33
4 5/8 8 3 1/2 4 1/4 R36
5 3/4 8 3 3/4 4 1/2 R40
6 3/4 8 4 4 1/2 R43
8 3/4 8 4 1/4 4 3/4 R48
10 7/8 12 4 3/4 5 1/4 R52
12 7/8 12 4 3/4 5 1/2 R56
14 1 12 5 1/4 6 R59
16 1 16 5 1/2 6 R64
18 1 1/8 16 6 6 1/2 R68
20 1 1/8 20 6 1/4 7 R72
22 1 1/4 20 6 1/2 7 1/4 R80
24 1 1/4 20 7 7 3/4 R76

36
 ANSI B16.5 BOLTING CHART

ANSI 300 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.
1/2 1/2 4 2 1/2 3 R11
3/4 5/8 4 3 3 1/4 R13
1 5/8 4 3 1/4 3 1/4 R16
1 1/4 5/8 4 3 1/4 3 3/4 R18
1 1/2 3/4 4 3 1/2 4 R20
2 5/8 8 3 1/2 4 1/4 R23
2 1/2 3/4 8 4 4 1/2 R26
3 3/4 8 4 1/4 5 R31
3 1/2 3/4 8 4 1/4 5 R34
4 3/4 8 4 1/2 5 1/4 R37
5 3/4 8 4 3/4 5 1/4 R41
6 3/4 12 4 3/4 5 3/4 R45
8 7/8 12 5 1/2 6 1/4 R49
10 1 16 6 1/4 7 1/4 R53
12 1 1/8 16 6 3/4 7 1/2 R57
14 1 1/8 20 7 7 3/4 R61
16 1 1/4 20 7 1/2 8 1/4 R65
18 1 1/4 24 7 3/4 8 1/2 R69
20 1 1/4 24 8 1/4 9 1/4 R73
22 1 1/2 24 8 3/4 9 3/4 R81
24 1 1/2 24 9 1/4 10 1/4 R77

37
ANSI B16.5 BOLTING CHART

ANSI 400 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.
1/2 1/2 4 3 3 R11
3/4 5/8 4 3 1/2 3 1/2 R13
1 5/8 4 3 1/2 3 1/2 R16
1 1/4 5/8 4 3 3/4 3 3/4 R18
1 1/2 3/4 4 4 1/4 4 1/4 R20
2 5/8 8 4 1/4 4 1/4 R23
2 1/2 3/4 8 4 3/4 4 3/4 R26
3 3/4 8 5 5 R31
3 1/2 7/8 8 5 1/2 5 1/2 R34
4 7/8 8 5 1/2 5 1/2 R37
5 7/8 8 5 3/4 5 3/4 R41
6 7/8 12 6 6 R45
8 1 12 6 3/4 6 3/4 R49
10 1 1/8 16 7 1/2 7 1/2 R53
12 1 1/4 16 8 8 R57
14 1 1/4 20 8 1/4 8 1/4 R61
16 1 3/8 20 8 3/4 8 3/4 R65
18 1 3/8 24 9 9 R69
20 1 1/2 24 9 1/2 9 1/2 R73
22 1 5/8 24 10 10 1/2 R81
24 1 3/4 24 10 1/2 11 R77

38
 ANSI B16.5 BOLTING CHART

ANSI 600 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.
1/2 1/2 4 3 3 R11
3/4 5/8 4 3 1/4 3 1/4 R13
1 5/8 4 3 1/2 3 1/2 R16
1 1/4 5/8 4 3 3/4 3 3/4 R18
1 1/2 3/4 4 4 1/4 4 1/4 R20
2 5/8 8 4 1/4 4 1/2 R23
2 1/2 3/4 8 5 5 1/4 R26
3 3/4 8 5 5 1/4 R31
3 1/2 7/8 8 5 1/2 5 1/2 R34
4 7/8 8 5 3/4 6 R37
5 1 8 6 1/2 6 1/2 R41
6 1 12 6 3/4 7 R45
8 1 1/8 12 7 3/4 8 R49
10 1 1/4 16 8 1/2 8 3/4 R53
12 1 1/4 20 8 3/4 9 R57
14 1 3/8 20 9 1/4 9 1/2 R61
16 1 1/2 20 10 10 1/4 R65
18 1 5/8 20 10 3/4 11 R69
20 1 5/8 24 11 1/2 11 3/4 R73
22 1 3/4 24 12 12 1/2 R81
24 1 7/8 24 13 13 1/2 R77

39
ANSI B16.5 BOLTING CHART

ANSI 900 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.
1/2 3/4 4 4 4 1/4 R12
3/4 3/4 4 4 1/4 4 1/2 R14
1 7/8 4 4 3/4 5 R16
1 1/4 7/8 4 5 5 R18
1 1/2 1 4 5 1/4 5 1/2 R20
2 7/8 8 5 1/2 5 3/4 R24
2 1/2 1 8 6 1/4 6 1/4 R27
3 7/8 8 5 1/2 5 3/4 R31
4 1 1/8 8 6 1/2 6 3/4 R37
5 1 1/4 8 7 1/2 7 1/2 R41
6 1 1/8 12 7 1/2 7 3/4 R45
8 1 3/8 12 8 1/2 8 3/4 R49
10 1 3/8 16 9 9 1/4 R53
12 1 3/8 20 9 3/4 10 R57
14 1 1/2 20 10 1/2 11 R62
16 1 5/8 20 11 11 1/2 R66
18 1 7/8 20 12 3/4 13 1/4 R70
20 2 20 13 1/2 14 1/4 R74
24 2 1/2 20 17 18 R78

40
 ANSI B16.5 BOLTING CHART

ANSI 1500 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.
1/2 3/4 4 4 4 1/4 R12
3/4 3/4 4 4 1/4 4 1/2 R14
1 7/8 4 4 3/4 5 R16
1 1/4 7/8 4 5 5 R18
1 1/2 1 4 5 1/4 5 1/2 R20
2 7/8 8 5 1/2 5 3/4 R24
2 1/2 1 8 6 1/4 6 1/4 R27
3 1 1/8 8 6 3/4 7 R35
4 1 1/4 8 7 1/2 7 3/4 R39
5 1 1/2 8 9 3/4 9 3/4 R44
6 1 3/8 12 10 10 1/2 R46
8 1 5/8 12 11 1/4 11 3/4 R50
10 1 7/8 12 13 1/4 13 1/2 R54
12 2 16 14 3/4 15 1/4 R58
14 2 1/4 16 16 16 3/4 R63
16 2 1/2 16 17 1/2 18 1/2 R67
18 2 3/4 16 19 1/4 20 1/4 R71
20 3 16 21 22 1/4 R75
24 3 1/2 16 24 25 1/2 R79

41
ANSI B16.5 BOLTING CHART

ANSI 2500 LB
STUD BOLT LENGTHS RING JOINT
NOMINAL DIAMETER NO. OF
RAISED GASKET
PIPE SIZE OF STUDS STUDS RING JOINT
FACED NO.

1/2 3/4 4 4 3/4 4 3/4 R13

3/4 3/4 4 4 3/4 5 R16
1 7/8 4 5 1/4 5 1/2 R18
1 1/4 1 4 6 6 R21
1 1/2 1 1/4 4 6 1/2 6 3/4 R23
2 1 8 6 3/4 7 R26
2 1/2 1 1/4 8 7 3/4 8 R28
3 1 1/4 8 8 1/2 9 R32
4 1 1/2 8 9 3/4 10 1/4 R38
5 1 3/4 8 11 3/4 12 1/4 R42
6 2 8 13 1/2 14 R47
8 2 12 15 15 1/2 R51
10 2 1/2 12 19 20 R55

12 2 3/4 12 21 22 R60

42
 API FLANGE BOLTING CHART

2,000 LB W.P.
NOMINAL GASKET API NUMBER OF STUD BOLT STUD BOLT
SIZE NUMBER STUDS DIAMETER LENGTH

2 1/16 R23 8 5/8 4 1/2

2 9/16 R26 8 3/4 5
3 1/8 R31 8 3/4 5 1/4
4 1/16 R37 8 7/8 6
5 1/8 R41 8 1 6 3/4
7 1/16 R45 12 1 7
9 R49 12 1 1/8 8
11 R53 16 1 1/4 8 3/4
13 5/8 R57 20 1 1/4 9
16 3/4 R65 20 1 1/2 10 1/4
21 1/4 R73 24 1 5/8 11 3/4
26 3/4 BX167 20 1 3/4 13 3/4

43
API FLANGE BOLTING CHART

3,000 LB W.P.
NOMINAL GASKET API NUMBER OF STUD BOLT STUD BOLT
SIZE NUMBER STUDS DIAMETER LENGTH
3 1/8 R31 8 7/8 6
4 1/16 R37 8 1 1/8 7
5 1/8 R41 8 1 1/4 7 3/4
7 1/16 R45 12 1 1/8 8
9 R49 12 1 3/8 9
11 R53 16 1 3/8 9 1/2
13 5/8 R57 20 1 3/8 10 1/4
16 3/4 R66 20 1 5/8 11 3/4
20 3/4 R74 20 2 14 1/2
26 3/4 BX168 24 2 17

44
 API FLANGE BOLTING CHART

5,000 LB W.P.
NOMINAL GASKET API NUMBER OF STUD BOLT STUD BOLT
SIZE NUMBER STUDS DIAMETER LENGTH
2 1/16 R24 8 7/8 6
2 9/16 R27 8 1 6 1/2
3 1/8 R35 8 1 1/8 7 1/4
4 1/16 R39 8 1 1/4 8
5 1/8 R44 8 1 1/2 10

7 1/16 R46 12 1 3/8 10 3/4

9 R50 12 1 5/8 12
11 R54 12 1 7/8 13 3/4
13 5/8 BX160 16 1 5/8 12 1/2
16 3/4 BX162 16 1 7/8 14 1/2

18 3/4 BX163 20 2 17 1/2

21 1/4 BX165 21 2 18 3/4

45
API FLANGE BOLTING CHART

10,000 LB W.P.
NOMINAL GASKET API NUMBER OF STUD BOLT STUD BOLT
SIZE NUMBER STUDS DIAMETER LENGTH
1 13/16 BX151 8 3/4 5
2 1/16 BX152 8 3/4 5 1/4
2 9/16 BX153 8 7/8 6
3 1/16 BX154 8 1 6 3/4
4 1/16 BX155 8 1 1/8 8
5 1/8 BX169 12 1 1/8 8 3/4
7 1/16 BX156 12 1 1/2 11 1/4
9 BX157 16 1 1/2 13
11 BX158 16 1 3/4 15
13 5/8 BX159 20 1 7/8 17 1/4
16 3/4 BX152 24 1 7/8 17 1/2
18 3/4 BX164 24 2 1/4 22 1/2

21 1/4 BX166 24 2 1/4 24 1/2

46
 API FLANGE BOLTING CHART

15,000 LB W.P.
NOMINAL GASKET API NUMBER OF STUD BOLT STUD BOLT
SIZE NUMBER STUDS DIAMETER LENGTH
1 13/16 BX151 8 7/8 5 1/2
2 1/16 BX152 8 7/8 6

2 9/16 BX153 8 1 6 3/4

3 1/16 BX154 8 1 1/8 7 1/2
4 1/16 BX155 8 1 3/8 9 1/4
7 1/16 BX156 16 1 1/2 12 3/4
9 BX157 16 1 7/8 15 3/4

11 BX158 20 2 19 1/4
13 5/8 BX159 20 2 1/4 21 1/4
18 3/4 BX164 20 3 26 3/4

47
API FLANGE BOLTING CHART

25,000 LB W.P.
NOMINAL GASKET API NUMBER OF STUD BOLT STUD BOLT
SIZE NUMBER STUDS DIAMETER LENGTH

1 13/16 BX151 8 1 7 1/2

2 1/16 BX152 8 1 1/8 8 1/4
2 9/16 BX153 8 1 1/4 9 1/4
3 1/8 BX154 8 1 3/8 10
4 1/16 BX155 8 1 3/4 12 1/4
7 1/16 BX156 16 2 17 1/2
9 BX157 16 2 1/2 22 1/2
11 BX158 20 2 3/4 23 3/4
13 5/8 BX159 20 3 30

48
BOLT TORQUE VALUES NOTES

Standard Bolt Torque

1. Tightening torque values from the formula T=KDP, where T = $ghtening torque,
lb. F. K - torque fric$on coefficient, D = nominal bolt diameter, in.; and P = bolt
clamping load developed by $ghtening, lb.

Note: Dry K = 0.22, Lubed K = 0.17

2. No proof load has been established by ASTM. Value shown in table are assumed
at 95% of yield strength.

3. Proof load is the published number that full size headed bolts are tested to. The
bolt is stressed up to the proof load value, and if there is no deforma$on,
elonga$on, or fracture, then the bolt is deemed to have passed. For bol$ng
specifica$ons that do not have a published proof load, it is usually calculated at 92%
of ul$mate yield strength.

4. Clamp load is also known as preload or ini$al load in tension on bolt. Clamp load
(lb.) is calculated by arbitrarily assuming useable bolt strength is 75% of bolt proof
load (PSI) $mes the stress area (sq. in.) of threaded sec$on of each bolt size. Higher
or lower values of clamp load can be used depending on the applica$on
requirements and the judgment of the designer. The Maximum Bolt Torque chart is
based on these values.

5. It is not generally recommend that bolt stress be above 60,000 psi (60ksi).
Extreme opera$ng condi$ons such as high temperature may reduce bolt yield
strength. Cau$on should be used in these applica$ons.

50
 BOLT TORQUE VALUE NOTES

Gasket Bolt Torque

Gasket Bolt Charts are suggested torque values using ASTM A193 B7 bol$ng or
equal yield strength bolt material and ASME B16.5 raised face flanges.

Charts are based on Fric$on Factor (K) of 0.17

Use correct size and new bolts, studs, nuts, washers. Mul$ply torques values by
0.70 for PTFE coated bol$ng. Lubricate on bolt threads and nut faces with
compa$ble an$-seize. The charts give the torque value for the final pass. AFer hand
$ghtening, torqueing must follow a cross bol$ng sequence. There shall be 3
complete passes (30%, 60%, 100% of final pass torque). Once final torque is
achieved, a minimum of 2 clockwise passes to be applied un$l there is no further
nut rota$on.

ASME B16.20-2017 states that inward bucking of spiral wound gaskets has been
iden$fied as a poten$al problem. It is recommended that inner rings be used.

Your specific applica on should not be undertaken without independent study

and evalua on for suitability. For specific applica on recommenda ons consult
QUEST. Failure to select proper sealing products could result in property damage
and/or serious personal injury.

Ring Type Joint Gasket Bolt Torque

The torque values reprinted in these tables are guidelines only and are the exclusive
property of API.
Note: Calcula$ons based on K = 0.07 for PTFE (Teflon/Xylan) coa$ngs and K = 0.13
for commonly available an$-seize lubricants.
All values are approximate. No assump$on of liability by API or Quest is implied or
assumed for the use of this informa$on.

51
MAXIMUM BOLT TORQUE VALUES
ALLOY STEEL BOLT ASTM A193 B7, A320 L7

See Bolt Torque Value Notes

Yield Strength = 105 ksi

Tensile Bolt Stress = 75 ksi
Stud Dia. Threads Per
Stress Area
(inches) Inch (TPI) (Sq. Inch) Clamp Load Dry Lubed
P. Lbs. FT-LB Torque FT-LB Torque
1/2 13 0.142 10,616 97 75
5/8 11 0.226 16,908 194 150
3/4 10 0.334 25,022 344 266
7/8 9 0.462 34,544 554 428
1 8 0.606 45,317 831 642
1 1/8 8 0.790 59,136 1,220 942
1 1/4 8 1.000 74,791 1,714 1,324
1 3/8 8 1.234 92,281 2,326 1,798
1 1/2 8 1.492 111,609 3,069 2,372
1 5/8 8 1.775 132,772 3,955 3,057
1 3/4 8 2.082 155,771 4,998 3,862
1 7/8 8 2.414 180,607 6,208 4,797
2 8 2.771 207,279 7,600 5,873
2 1/4 8 3.557 266,131 10,978 8,483
2 1/2 8 4.442 332,328 15,232 11,770

52
 MAXIMUM BOLT TORQUE VALUES
ALLOY STEEL BOLT ASTM A193M B7M, A320 L7M

See Bolt Torque Value Notes

Yield Strength = 80 ksi

Stud Dia. Threads Per Tensile Bolt Stress = 57 ksi
Stress Area
(inches) Inch (TPI) (Sq. Inch) Clamp Load Dry Lubed
P. Lbs. FT-LB Torque FT-LB Torque
1/2 13 0.142 8,088 74 57
5/8 11 0.226 12,882 148 114
3/4 10 0.334 19,064 262 203
7/8 9 0.462 26,319 422 326
1 8 0.606 34,527 633 489
1 1/8 8 0.790 45,056 929 718
1 1/4 8 1.000 56,983 1,306 1,009
1 3/8 8 1.234 70,310 1,772 1,370
1 1/2 8 1.492 85,035 2,338 1,807
1 5/8 8 1.775 101,159 3,014 2,329
1 3/4 8 2.082 118,683 3,808 2,942
1 7/8 8 2.414 137,605 4,730 3,655
2 8 2.771 157,927 5,791 4,475
2 1/4 8 3.557 202,766 8,364 6,463
2 1/2 8 4.442 253,202 11,605 8,968

53
MAXIMUM BOLT TORQUE VALUES
LARGE DIAMETER

ALLOY STEEL BOLT ASTM A193 B7, A320, L43

See Bolt Torque Value Notes

Yield Strength = 105 ksi

Tensile Bolt Stress = 75 ksi
Stud Dia. Threads Per
Stress Area
(inches) Inch (TPI) (Sq. Inch)
Clamp Load Dry Lubed

P. Lbs. FT-LB Torque FT-LB Torque

2 3/4 8 5.425 367,215 18,514 14,306
3 8 6.506 440,398 24,222 18,717
3 1/4 8 7.686 520,226 30,997 23,952
3 1/2 8 8.963 606,699 38,930 30,082
3 3/4 8 10.339 699,818 48,112 37,178
4 8 11.813 799,581 58,636 45,310

54
 MAXIMUM BOLT TORQUE VALUES
LARGE DIAMETER BOLTS

ALLOY STEEL BOLT ASTM A193M B7M

See Bolt Torque Value Notes

Yield Strength = 80 ksi

Stud Dia. Threads Per Tensile Bolt Stress = 57 ksi
Stress Area
(inches) Inch (TPI) (Sq. Inch)
Clamp Load Dry Lubed
P. Lbs. FT-LB Torque FT-LB Torque
2 3/4 8 5.425 309,234 15,591 12,047
3 8 6.506 370,861 20,397 15,762
3 1/4 8 7.686 438,085 26,103 20,170
3 1/2 8 8.963 510,904 32,783 25,332
3 3/4 8 10.339 589,320 40,516 31,308
4 8 11.813 673,332 49,378 38,155

55
SUGGESTED BOLT TORQUE VALUES AT CORRESPONDING
BOLT STRESSES
ALLOY STEEL BOLTS: ASTM A193 B7, A320 L7, A193M B7M, A320 L7M
See Bolt Torque Value Notes

Bolt Stress = 60 ksi Bolt Stress = 45 ksi

Tensile
Stud Dia Threads Stress
(Inches) Per Inch Area Lubed Lubed
Tension Tension
(Sq. Inch) Torque Torque
F (lbf) F (lbf)
(K-lbf) (K-lbf)

1/2 13 0.142 8,514 60 6,385 45

5/8 11 0.226 13,560 120 10,170 90
3/4 10 0.334 20,068 213 15,051 160
7/8 9 0.462 27,704 343 20,778 258
1 8 0.606 36,345 515 27,259 386
1 1/8 8 0.790 47,427 756 35,570 567
1 1/4 8 1.000 59,982 1,062 44,987 797
1 3/8 8 1.234 74,010 1,442 55,508 1,081
1 1/2 8 1.492 89,511 1,902 67,133 1,427
1 5/8 8 1.775 106,484 2,451 79,863 1,839
1 3/4 8 2.082 124,929 3,097 93,697 2,323
1 7/8 8 2.414 144,848 3,848 108,636 2,886
2 8 2.771 166,238 4,710 124,679 3,533
2 1/4 8 3.557 213,438 6,803 160,079 5,103
2 1/2 8 4.442 266,528 9,440 199,896 7,080
56
SUGGESTED BOLT TORQUE VALUES AT CORRESPONDING
BOLT STRESSES
ALLOY STEEL BOLTS: ASTM A193 B7, A320 L7, A193M B7M, A320 L7M
See Bolt Torque Value Notes

Bolt Stress = 25 ksi

Bolt Stress = 30 ksi
(Low Torque)
Tensile
Stud Dia Threads
Stress Area Lubed Lubed
(Inches) Per Inch Tension Tension
(Sq. Inch) Torque Torque
F (lbf) F (lbf)
(K-lbf) (K-lbf)

1/2 13 0.142 4,257 30 3,547 25

5/8 11 0.226 6,780 60 5,650 50
3/4 10 0.334 10,034 107 8,362 89
7/8 9 0.462 13,852 172 11,543 143
1 8 0.606 18,172 257 15,144 215
1 1/8 8 0.790 23,714 378 19,761 315
1 1/4 8 1.000 29,991 531 24,993 443
1 3/8 8 1.234 37,005 721 30,838 601
1 1/2 8 1.492 44,755 951 37,296 793
1 5/8 8 1.775 53,242 1,226 44,368 1,021
1 3/4 8 2.082 62,465 1,549 52,054 1,291
1 7/8 8 2.414 72,424 1,924 60,353 1,603
2 8 2.771 83,119 2,355 69,266 1,963
2 1/4 8 3.557 106,719 3,402 88,933 2,835
2 1/2 8 4.442 133,264 4,720 111,053 3,933
57
API FLANGE (RTJ) SUGGESTED BOLT TORQUE VALUES
BOLTING TORQUE VALUES RECOMMENDED BY API-6A 20th EDITION

See Bolt Torque Value Notes

ASTM A193/194, A320 (B7, L7)

Yield Strength = 105 ksi Bolt Stress = 52.5 ksi
Stud Dia. Threads Per
(inches) Inch (TPI)
Tension Torque Xylan Torque Lubed
F (lbf) (K.-lbf) (K.-lbf)

1/2 13 7,450 35 59
5/8 11 11,865 68 115
3/4 10 17,559 118 200
7/8 9 24,241 188 319
1 8 31,802 279 474
1 1/8 8 41,499 401 686
1 1/4 8 52,484 553 953
1 3/8 8 64,759 739 1,281
1 1/2 8 78,322 962 1,677
1 5/8 8 93,173 1,226 2,146
1 3/4 8 109,313 1,534 2,696
1 7/8 8 126,741 1,890 3,332
2 8 145,458 2,297 4,061
2 1/4 8 186,758 3,276 5,822
2 1/2 8 233,212 4,500 8,030

58
 API FLANGE (RTJ) SUGGESTED BOLT TORQUE VALUES
BOLTING TORQUE VALUES RECOMMENDED BY API-6A 20th EDITION

See Bolt Torque Value Notes

ASTM A193M/194M, A320M (B7M, L7M)

Yield Strength = 80 ksi Bolt Stress = 40 ksi
Stud Dia. Threads Per
(inches) Inch (TPI)
Tension Torque Xylan Torque Lubed
F (lbf) (K.-lbf) (K.-lbf)

1/2 13 5,676 27 45
5/8 11 9,040 52 88
3/4 10 13,378 90 153
7/8 9 18,469 143 243
1 8 24,230 213 361
1 1/8 8 31,618 305 523
1 1/4 8 39,988 421 726
1 3/8 8 49,340 563 976
1 1/2 8 59,674 733 1,278
1 5/8 8 70,989 934 1,635
1 3/4 8 83,286 1,169 2,054
1 7/8 8 96,565 1,440 2,539
2 8 110,825 1,750 3,094
2 1/4 8 142,292 2,496 4,436
2 1/2 8 177,685 3,429 6,118

59
SPIRAL WOUND SUGGESTED BOLT TORQUE VALUES
GASKET: TEADIT® STYLE 913M (WITH INNER AND OUTER RINGS)

See Bolt Torque Value Notes

Nominal
150 300 400 600 900 1500 2500
Pipe Size

1/2 28 28 --- 28 --- 80 85

3/4 43 43 --- 57 --- 100 85
1 50 72 --- 86 --- 160 125
1 1/4 57 101 --- 86 --- 200 220
1 1/2 57 151 --- 159 --- 275 320
2 122 108 --- 86 --- 200 220
2 1/2 122 144 --- 122 --- 300 320
3 122 173 --- 180 265 400 450
3 1/2 122 202 --- 300 --- --- ---
4 122 202 325 296 500 650 750
5 202 202 325 448 840 1000 1300
6 202 202 325 448 590 900 2000
8 202 325 506 614 950 1400 2000
10 325 506 614 867 950 2400 3500
12 325 723 867 867 1130 2500 5000
14 506 614 867 1193 1330 3200
16 506 867 1193 1410 1830 4500
18 723 1012 1193 1880 3000 6000
20 723 1012 1410 1880 3000 7730
24 1012 1410 2603 3471 5000 12750

60
 KAMMPROFILE SUGGESTED BOLT TORQUE VALUES
GASKET: TEADIT® STYLE 946 (WITH LOOSE LOCATING OUTER RING)

See Bolt Torque Value Notes

Nominal
150 300 400 600 900 1500 2500
Pipe Size

1/2 40 40 --- 40 --- 80 85

3/4 60 65 --- 60 --- 100 85
1 60 90 --- 85 --- 160 125
1 1/4 60 105 --- 85 --- 200 220
1 1/2 60 170 --- 160 --- 275 320
2 120 90 --- 85 --- 200 220
2 1/2 120 115 --- 160 --- 300 320
3 125 160 --- 180 265 400 450
3 1/2 120 200 --- 300 --- --- ---
4 115 200 320 330 500 650 750
5 200 200 320 470 840 1000 1300
6 200 200 320 470 590 900 2000
8 225 320 500 650 950 1400 2000
10 320 500 620 875 950 2400 3500
12 320 710 875 875 1130 2500 5000
14 500 535 875 1020 1330 3200
16 405 835 1200 1335 1830 4500
18 650 835 1200 1900 3000 6000
20 595 835 1400 1900 3000 7730
24 835 1200 2600 3000 5000 12750
61
CORRUGATED METAL SUGGESTED BOLT TORQUE VALUES
GASKET: TEADIT STYLE 905 METALBEST®

See Bolt Torque Value Notes

Nominal Pipe
150 300
Size
1/2 60 60
3/4 60 120
1 60 120
1 1/4 60 120
1 1/2 80 200
2 120 90
2 1/2 120 130
3 160 160
3 1/2 120 200
4 115 200
5 230 260
6 260 210
8 260 320
10 420 500
12 420 710
14 650 535
16 405 835
18 650 835
20 595 835
24 835 1300
62
SHEET GASKETING SUGGESTED BOLT TORQUE VALUES
GASKET: TEADIT® COMPRESSED FIBER, TEALON™, QUIMFLEX 24SH,
FLEXIBLE GRAPHITE 2660, 2661, 2663

See Bolt Torque Value Notes

Nominal Pipe
150 300
Size
1/2 28 28
3/4 43 43
1 50 72
1 1/4 57 101
1 1/2 57 151
2 122 108
2 1/2 122 144
3 122 173
3 1/2 122 202
4 122 202
5 202 202
6 202 202
8 202 325
10 325 506
12 325 723
14 506 614
16 506 867
18 723 1012
20 723 835
24 1012 1410
63
INSULATION GASKET SUGGESTED BOLT TORQUE VALUES
See Bolt Torque Value Notes

Nominal
150 300 400 600 900 1500 2500
Size
1 40 80 80 80 110 110 170
1 1/4 40 80 110 110 170 170 300
1 1/2 40 110 110 110 240 240 400
2 80 110 110 110 170 170 300
2 1/2 80 150 150 150 240 240 400
3 110 150 150 150 215 370 600
3 1/2 80 150 180 200
4 100 180 180 225 450 650 650
5 120 180 215 350 650 1000 1500
6 130 170 215 320 455 820 2300
8 130 265 320 450 820 1400 2400
10 215 320 450 650 850 2100 4900
12 220 450 650 675 870 2300 7900
14 320 450 625 820 1125 3400
16 320 650 820 1125 1430 4300
18 450 650 820 1430 2230 6200
20 450 650 1100 1400 2300 7800
22 460 1125 1425 1775
24 650 1200 1775 2230 5500 13000
26 650 1400 1750 2200 7400
28 650 1500 2200 2300 8400
30 650 1700 2300 2360 9500
32 1000 2000 2300 3900 10500
34 1000 2250 2350 3950 12400
36 1100 2300 2350 5500 13800
38 2300 4800 7000
40 1100 2400 5200 7200
42 1150 2400 5500 7400
64
 INSULATION GASKET SUGGESTED BOLT TORQUE VALUES

Pressure 150 300 400 600 900 1500 2500

Opera$ng 285 740 990 1480 2220 3705 6170
Hydro Test 455 1135 1510 2245 3355 5585 9280

Torque Values obtained based on above Working and Hydro Test Pres-
sures (psi)

BOLT TORQUE SEQUENCE NOTES

When Installing the gasket and $ghtening cold, refer to Bolt Torque
Sequence Charts. "Hot Flow" of the gasket material may occur under
opera$ng condi$ons, resul$ng in loss of Bolt Pressure. It is advisable
therefore, to re-$ghten bolts aFer opera$ng temperature has been
reached - preferably at Zero Line Pressure and Ambient Temperature.
Under no circumstances should the system be allowed to return to
opera$ng Temperature WITHOUT re-checking and re-$ghtening bolts
where needed.

To provide even sealing pressure on a flange gasket kit it is

recommended that the bolts be "snugged" up in the sequence shown
un$l the flange faces are in contact with the gasket. AFer the flange
faces are in contact with the gasket, firmly $ghten the bolts in the same
sequence.

Note: G10/Viton or G10/Teflon Gaskets do not grease seal prior to

installa$on.

65
4 TO 20 HOLE, BOLT TORQUE SEQUENCE

Number bolts or flange holes with a “marker” as shown in the diagram.

Install each bolt with their nuts, washers and hand $ghten the nuts
following the numerical sequence of the diagram. The flanges should be
parallel and contac$ng uniformly across the gasket. If tools are used to
bring the flanges together the maximum force should be equal or less
than 10% of the target force. The stud length should have at least two
threads protrude beyond the nut.

Steps:

1. Tighten studs 1, 2, 3 and 4 with 30% of the final torque or force.

Ensure the flanges are parallel.

2. Tighten studs 1, 2, 3 and 4 with 60% of the final torque or force.

Ensure the flanges are parallel.

3. Tighten studs 1, 2, 3 and 4 with 100% of the final torque or force.

Ensure the flanges are parallel.

4. Tighten all studs with 100% of the final torque or force in a circular
pass. Ensure the flanges are parallel.

5. Repeat the fourth (4) step un$l the nuts no longer turn.

66
4 TO 20 HOLE, BOLT TORQUE SEQUENCE

67
24 HOLE, BOLT TORQUE SEQUENCE

Number bolts or flange holes with a “marker” as shown in the diagram.

Install each bolt with their nuts, washers and hand $ghten the nuts
following the numerical sequence of the diagram. The flanges should be
parallel and contac$ng uniformly across the gasket. If tools are used to
bring the flanges together the maximum force should be equal or less
than 10% of the target force. The stud length should have at least two
threads protrude beyond the nut.

Steps:

1. Tighten all studs in the numerical sequence as shown with 30% of

the final torque or force. Ensure the flanges are parallel.

2. Tighten all studs in the numerical sequence as shown with 60% of

the final torque or force. Ensure the flanges are parallel.

3. Tighten all studs in the numerical sequence as shown with 100% of

the final torque or force. Ensure the flanges are parallel.

4. Tighten all studs with 100% of the final torque or force in a circular
pass. Ensure the flanges are parallel.

5. Repeat the fourth (4) step un$l the nuts no longer turn.

68
24 HOLE, BOLT TORQUE SEQUENCE

69
24 OR MORE HOLE, BOLT TORQUE SEQUENCE

Number bolts or flange holes with a “marker” as shown in the diagram.

Install each bolt with their nuts, washers and hand $ghten the nuts
following the numerical sequence of the diagram. The flanges should be
parallel and contac$ng uniformly across the gasket. If tools are used to
bring the flanges together the maximum force should be equal or less
than 10% of the target force. The stud length should have at least two
threads protrude beyond the nut.

Steps:

1. Tighten studs 1, 2, 3, 4, 5, 6, 7 and 8 with 30% of the final torque or

force. Ensure the flanges are parallel.

2. Tighten studs 1, 2, 3, 4, 5, 6, 7 and 8 with 60% of the final torque or

force. Ensure the flanges are parallel.

3. Tighten studs 1, 2, 3, 4, 5, 6, 7 and 8 with 100% of the final torque

or force. Ensure the flanges are parallel.

4. Tighten all studs with 100% of the final torque or force in a circular
pass. Ensure the flanges are parallel.

5. Repeat the fourth (4) step un$l the nuts no longer turn.

70
24 OR MORE HOLE, BOLT TORQUE SEQUENCE

71
72