Contractor:
Client :
PROCEDURE
Date: 07 Oct. 2018
Document Ref. No. NP-MS-0002
Contract # 6600041786
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 2 of 11
Revision
0
TABLE OF CONTENTS
CONTENTS:
PAGE
1. Purpose
3
2. References
3
3. Responsibility
3
4. General
4
5. Requirements
4
6. Procedure
7
7. Records
11
8. Attachments
11
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
Date: 07 Oct. 2018
PROCEDURE
Document Ref. No. NP-MS-0002
Contract # 6600041786
1.0
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 3 of 11
Revision
0
PURPOSE:
The purpose of this procedure is to define the methodology to be employed in order to control
the installation of gaskets and bolting of flanged joints to meet ARAMCO standards and
international codes.
2.0
REFERENCE:
ARAMCO Standards References
SAES-L-109
SAES-L-350
SAEP-351
-Selection of Flanges, Stud Bolts and Gaskets.
-Construction of Plant Piping.
-Bolted Flange Joint Assembly.
American Society of Mechanical Engineers
ASME B16.5 -Pipe Flanges and Flange Fittings NPS ½ through NPS 24
ASME B16.47 -Large Diameter steel Flanges NPS 26 through NPS 60
ASME B31.3 -Process Piping.
ASME PCC-1 -Guidelines for Pressure Boundary Bolted Flange Joint Assembly.
3.0
RESPONSIBILITIES:
3.1.
The Material Controller and QC Piping inspector shall check bolts and gaskets arriving
at store/ warehouse for damages and quantities against delivered documents.
3.2
The Piping Construction Supervisor shall check all bolts and gaskets for correct code,
type, size and rating. He shall check that mill coating on the flange are removed, the
gasket sealing areas have no defects and the grease, oil and oxides are wiped off prior
to installation.
3.3
The Piping QC Inspector shall check and verify the correct bolts and gasket type,
rating, dimension and compatibility with the flange face is installed. Ensuring all
inspections and requirements are carried out in accordance with project drawing
specification; he shall signify his acceptance with appropriate marking on the flange.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
PROCEDURE
Date: 07 Oct. 2018
Document Ref. No. NP-MS-0002
Contract # 6600041786
3.4
4.0
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 4 of 11
Revision
0
Final inspection and verification of the correct gasket installation shall be recorded on
appropriate forms signed by Nesma Piping QC inspector and ARAMCO Piping QC
inspector.
GENERAL
4.1 Mechanical joints criticality assessment for the facility shall be conducted to identify
critical flanges.
4.2 A bolt up procedure shall be developed for each flange assembly and shall be
approved by Saudi Aramco.
4.3 The flange joint assemblers shall be qualified by independent accreditation
organization. There are several agencies and individual companies that can provide
training approved by Engineering Construction Industry Training Board (ECITB) or
American Petroleum Institute (API) or City & GUILDS. record shall be maintained to
demonstrate the technician’s competency.
4.4
5.0
Flange shielding shall be installed/reinstalled as required.
REQUIREMENTS
5.1 Gasket

The gasket rating and dimension for piping system shall be verified as required by
ASME B16.20 and ASME B16.21. For other gaskets that are not within the scope of
ASME, the rating and the dimensions shall be according to the manufacturer’s
specification.

The gasket type and application for piping system shall be verified as required base
on the line class for the piping system.

Gasket shall not be damaged or distorted and free of all foreign particles.

The gaskets shall not have any defects. Gaskets with defects shall be replaced.

The gaskets shall be marked to identify rating and size and other principal
characteristics. Gaskets with no marking shall not be installed.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
PROCEDURE
Date: 07 Oct. 2018
Document Ref. No. NP-MS-0002
Contract # 6600041786

PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 5 of 11
Revision
0
The seal rings for the clamp connectors shall be provided from the clamp connector
manufactures.
5.2 Bolts

Bolts, nuts and washers shall be visually checked for proper size, grade, and
dimension and for any physical damage such as corrosion, rust and burrs. Also, the
suitability of the stud bolts and nuts material for the service temperature and the
compatibility with the flange material shall be checked.

The bolts/nuts combinations for which the nuts will not turn freely by hand shall be
verified.

Bolts and nuts shall be replaced when reassembling existing flanges.

Any abuse bolts and nuts shall be replaced even after the flange assembly.

Reconditioned nuts are not acceptable.

The nuts shall have full thread engagement after the flange assembly.
5.3 Gasket Contact Surface

The gasket contact surface shall be examined for compliance with the recommended
surface finish and for damage to surface finish such as scratches, nicks, gouges and
burrs.

When reassembling flange joint, all indications of the previous gasket installation
shall be removed.

Surface finish of the gasket contact shall be according to Appendix A.

Lubricant shall not be used in the gasket and the gasket seating area.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
Date: 07 Oct. 2018
PROCEDURE
Document Ref. No. NP-MS-0002
Contract # 6600041786
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 6 of 11
Revision
0
5.4 Lubricant

Lubricant shall be applied to both the nut bearing surface and the male threads.

Lubricants of proven coefficient of friction shall be chemically compatible with the
bolt/nuts/washer materials.

Friction factors for some common lubricant are addressed in Appendix B, Table B-1.

The nuts shall be turned freely by hand before applying the lubricant.
5.5 Alignment of Mechanical Joints

The joint should be aligned without any external forces. Appendix C shall be
followed.

For clamp connector, the hubs shall be aligned to allow engagement of the seal ring
lips to hub sealing surfaces. Clamp connector installation guideline line is addressed
in Appendix D.
5.6 Equipment and Tools

Hammering/flogging is not permitted during bolts losing or tightening.

Tightening tools shall be checked for adequacy, performance and calibration. The
tools accuracy should not exceed ±5%.

Impact wrench shall not be used.

Manual torque wrenches shall not be used for 1” bolts size and larger. All manual
torque wrenches shall have calibrated torque measurement.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
PROCEDURE
Date: 07 Oct. 2018
Document Ref. No. NP-MS-0002
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Contract # 6600041786
6.0
Page 7 of 11
Revision
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PROCEDURE
6.1
Gasket identification and installation
6.1.1 Gasket identification
a)
All gaskets shall be colour coded in accordance with approved colour.
b)
Colour coding list shall be posted in the ware house and inspection area.
6.1.2 Gasket Storage
a) All gaskets shall be stored on indoor racks according to their type, size, rating and
colour code. Gasket should be placed on the wooden sleepers or suitable supports
and shall be protected from dust, rain, direct sunlight and heat.
b) Spiral wound gaskets with sizes 24” and above are stored on flat position and shall
not be not be hanging or stored vertically to prevent distortion.
c) Permanent gaskets and temporary gaskets shall be stored separately.
d) Upon receipt of inspection, accepted gaskets shall be identified and stored in their
respective places.
6.1.3 Gasket Installation
a) All gaskets shall be issued in accordance with Material Take-Offs, drawing and
specification.
b) Check and verify the gasket for correct colour code, type, size and rating.
c) Prior to installation, Piping QC Inspector shall inspect flange faces, particularly
the seated area, for cleanliness and ensure that no damage exists.
d) Gasket shall be installed while flanges are aligned in order to ensure that no
damage occurs to gasket during subsequent tightening operations.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
Date: 07 Oct. 2018
PROCEDURE
Document Ref. No. NP-MS-0002
Contract # 6600041786
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 8 of 11
Revision
0
e) Temporary gasket may be used at flanges designated at test limits before the
pressure test and they shall be identified by a red “X” paint marks applied on the
back face of the flange.
f)
Permanent gaskets shall be at line flanges. Except where PWHT of adjacent weld
joints are still outstanding and where associated piping components will be
removed during pressure test.
g) Only qualified personnel shall be allowed to install permanent gaskets.
h) Damaged and used gaskets shall be identified and broken to half to avoid re-use.
6.1.4 Verification
a) All flanges that are witnessed for correct gasket installation shall be sign marked
and the use of bolting material in accordance to the relevant piping class.
b) Installation of gasket report to be signed off by inspectors.
c) Replacement of temporary gaskets shall be witnessed by inspectors.
6.2
Bolt Tightening
6.2.1 Bolt Tightening Sequence
a) Bolts, nuts and washers shall be visually checked for proper size, grade and
dimension conformance to specification, cleanliness and absence of burrs. Also
check suitability of the stud bolts and nuts material for the service temperature
and the compatibility with the flange material. Any bolt, nut and washer which are
not suitable for use shall be returned to store.
b) Bolts, nuts and washers shall be segregated according to their material class.
They should be issued as mixed.
c) Each bolt shall then be numbered in accordance with its position on the flange in
accordance with Stud Bolt Tightening Sequence.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
Date: 07 Oct. 2018
PROCEDURE
Document Ref. No. NP-MS-0002
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Contract # 6600041786
Page 9 of 11
Revision
0
d) bolt shall be tightened in stages to obtain final torque values in accordance with
Torque Values; the first stage shall not exceed 30% of the final torque value. The
final torque values shall be within +/- 5% of required torque.
6.2.2 Action when Leaks occur during Pressure testing.
a) Depressurize the system and re-torque the studs to maximum values.
b) If the leak had not been stopped by the re-torqueing operation, then disassemble
the flange and carry out the following.
1. Inspect bolts and nuts for damage and dirt.
2. Inspect flange faces for damage or misalignment.
3. Inspect gasket for damage or defect.
c) After the defected or damaged items have been replaced, reassemble the flange
using new gaskets and tighten the bolts using maximum torque values.
6.2.3 Stud Bolt Tightening Procedure
a)
Align flanges and gaskets.
b)
Apply lubricant to stud threads over length and nut engagement and face of
nut which contacts with flange
c)
Install al stud and nut hand tight, position the nut at the end of the stud such
that only crown of the stud project beyond the face of the nut. The excess length
should project the nut on the other sides.
d)
Number each stud according to its position in the flange as shown in the
attached figures.
e)
Tighten the stud as per the sequences shown in the figure SAP-351-01 with
an appropriate tool.
f) For joints containing R.T.J or spiral wound gasket, repeat step “e”.
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
PROCEDURE
Date: 07 Oct. 2018
Document Ref. No. NP-MS-0002
Contract # 6600041786
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 10 of 11
Revision
0
g) stud shall be tightened in stages to obtain final torque values in accordance with
Torque Values; the first stage shall not exceed 30% of the final torque value. The
final torque values shall be within +/- 5% of required torque.
6.2.4 Torque Values
a) Torque values vary according to flange rating, bolt size, type of gasket and
friction factor of the thread lubricant.
b) The torque values are specified in Appendix-B, C and F (Torque Value) in
accordance with SAES-L-350(Construction of plant piping) and SAEP-351
(Bolted Flange Joint Assembly).
c) Appendix-F (Torque Value) applies to isolating gasket, based on a friction factor
0.125 in accordance with SAES-L-350(Construction of plant piping) and SAEP351 (Bolted Flange Joint Assembly).
6.2.5 Torqueing Tools
a) Selection of the proper tools depends on the stud bolt size, physical location of
the flange joint.
b) Tools instruction shall be followed for the operation, limitation and maintenance
of all torque wrenches used to perform flange bolt tightening.
c) Torque wrenches utilized for the project shall be calibrated per Sch Q
requirements.”
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Contractor:
Client :
PROCEDURE
Date: 07 Oct. 2018
Document Ref. No. NP-MS-0002
Contract # 6600041786
7.0
PROJECT: UPGRADE WATER HANDLING SYSTEM
HAWIYAH GOSP-3
BI–10–01801
Page 11 of 11
Revision
0
RECORDS
All records pertaining to this procedure shall be filed and maintained in the project QA/QC
office until completion of the project at which time they shall be transferred for archiving in
accordance with project requirements.
1- SAIC-L-2014 Inspection of bolted flange joint assembly
2- SATR-L-2001 Flange joint tightening inspection report
8.0
Attachments
Appendix A of SAEP-351 gasket contact surface finish
Appendix B of SAEP-351 lubricant coefficient of friction
Appendix C of SAEP-351 mechanical joint alignment
Appendix D of SAEP-351 clamp connector installation
Appendix E of SAEP-351 tightening sequences
Appendix F of SAEP-351 torque load values for friction coefficient 0.11, 0.13 and 0.15
-------------------------------------------------------
Document no.
NP-MS-0002 Rev.00
BOLT TORQUING, GASKET INSTALLATION AND
VERIFICATION PROCEDURE
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Appendix A - Gasket Contact Surface Finish
Table A-1 – Recommended Surface Finish
Gasket Description
Spiral-wound
Gasket Contact
Surface Finish
μm
μ In.
3.2-6.4
125-250
Corrugate metal jacket with corrugated metal core; full width and
circumference of both sides to be covered with adhesive-backed flexible
graphite tape
3.2-6.4
125-250
Grooved metal gasket with facing layers such as flexible graphite, PTFE,
or other conformable material
3.2-6.4
125-250
Flexible graphite reinforced with a metal interlayer insert
3.2-6.4
125-250
Grooved metal
1.6 max.
63 max.
Flat solid metal
1.6 max.
63 max.
Flat metal jacketed
2.5 max.
100 max.
Soft cut sheet, thickness ≤ 1.6 mm
3.2-6.4
125-250
Soft cut sheet, thickness > 1.6 mm
3.2-13
125-500
NOTE: Finishes listed are average surface roughness values and apply to either the serrated concentric or serrated
spiral finish on the gasket contact surface of the flange.
Page 8 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Appendix B – Lubricant’s Coefficient of Friction
Table B-1 – Coefficient of Friction for Different lubricants
Lubricant
Molykote 1000
Friction
Coefficient
0.11
Lubricant
Molykote 7443
Friction
Coefficient
0.13
Anti seize
0.09
Never seez Std grade (NS160)
0.18
Beldamite ASC
0.13
Never seez Spl grade (NS165)
0.18
Berutex FH-34
0.16
Nickeleez
0.12
Berutex FH-35
0.16
OKS 235
0.11
Biral BASC
0.11
OKS 240
0.12
Castrol Nucleol S202
Chesterton Nickel Anti
Seize (paste)
Copaslip
0.08
OKS 250
0.08
0.14
Omega 99
0.13
0.12
Omega 99N
0.09
Coppercrest
0.14
Omega 95
0.12
Copper Ease
0.14
PBC
0.13
Coppergrease
0.11
PBC/D Lead Free
0.12
Copperslip
0.09
Rocol ASP
0.1
CP Ironsides Q221285
0.12
Rocol J166
0.15
DAG 156
DAG 580 (Dry Lubricant)
Easyrun 100
0.15
0.16
0.08
Rocol 797
Spherol Castrol
Swanlube
0.16
0.13
0.12
Fel-Pro C-102
Fordec Copper Anti
seize
Gleitmo 165
0.16
Thread Eze
0.18
0.15
Triflow
0.1
0.1
Walkers Anti seize No 203
0.15
HP anti seize
0.15
WCF Anti seize
0.15
Maxol LFCP 5006
0.2
503
0.06
Molykote Cu-7439
0.15
504
0.09
Molykote G-Rapid
0.08
505
0.1
Molykote HSC
0.11
506
0.11
Molykote P37 paste
0.12
507
0.1
Molykote Q5-7405
0.04
516
0.18
Molykote Ti 1200
0.12
785 - Parting lub
0.17
Page 9 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Appendix C – Mechanical Joint Alignment Requirements
1.5 mm Max
0.8 mm maximum
difference
Parallelism
Centerline Tolerance
Min. t (gasket) and Max. 2 t
3 mm
Spacing
Rotational
Page 10 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Appendix D – Clamp Connector Installation Guideline
Installation of clamp-type connectors shall strictly follow the Manufacturer recommendations. The below
guidelines may only be used in the absence of such recommendations.
D.1
Use non-abrasive material to clean all lubricants and foreign matter from the hub sealing
surfaces before installation.
D.2
Polish the hub sealing surfaces using fine steel wool to remove scale, rust, burrs or surface
scratches from the hub sealing surfaces. In case of presence of severe corrosion, deep
scratches, or crack in the sealing surfaces, use new hubs. Lapping of hub sealing surfaces can
only be done by the manufacturer.
D.3
Use light film lubricants on the seal rings if they are uncoated or re-used. Ensure that lubricants
are free from solids or foreign materials.
Note:
Seal rings may be used if they are free from damage, severe corrosion, or cracks.
In case of any doubt, use new seal rings. New seal rings normally have coating
(PTFE, MoS2 with graphite) which acts as a lubricant.
D.4
Align the hubs so that the seal ring can be installed. In case of misalignment, contact the
manufacturer for maximum allowable values.
D.5
Install the seal ring in the sealing surface of the hubs. The seal ring should rock slightly; i.e., the
seal ring rib should not be able to fully contact the hub face (Free Position, Figure D-1). If it
does not rock, use a new seal ring.
Figure D-1 – Seal Ring FREE POSITION before Tightening
D.6
Apply lubricant to the hub clamp contact area, clamp ears, stud bolts and spherical faces of the
nut. This is to reduce friction and required torque during assembly.
D.7
Position the clamps around the hubs.
D.8
Insert the bolts in the bolt holes of the clamp ears.
Page 11 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
D.9
Tighten the spherical nuts noting that the spherical face shall fit into the spherical seats of the
clamp ears. The order of bolt tightening shall be in criss-cross pattern (i.e., bolt #1, #3, #2, #4)
while keeping the spacing between the clamp halves approximately equal.
D.10
Torque the bolts to the recommended torque value. Then, the clamp should be with a soft
hammer (jarred) and re-tightened. This procedure should be repeated until bolt torques does
not change after jarring.
D.11
Check that hub faces are in full contact with the seal ring rib after assembly (Make-Up Position,
Figure D-2).
Figure D-2 – Seal Ring MAKE-UP POSITION after Tightening
Page 12 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Appendix E - Tightening Sequence
Table E-1 – ASME PCC-1 Legacy Cross-Pattern Tightening Sequence
and Bolt Numbering System When Using a Single Tool
Page 13 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Appendix F – Torque Load Values for Friction Coefficients 0.11, 0.13 and 0.15
Table F-1 Torque Loads
NPS
Rating
2
150
300
600
900
1500
2500
150
300
600
900
1500
2500
150
300
600
900
1500
2500
150
300
600
900
1500
2500
150
300
600
900
1500
2500
150
300
600
900
1500
2500
4
6
8
10
12
No. of Bolts X
Bolt Size
4X 5/8”
8X5/8”
8X5/8”
8X 7/8”
8X 7/8”
8X 1”
8X 5/8”
8 x ¾”
8X 7/8”
8X 1 1/8”
8X1 ¼”
8X 1 ½”
8 X ¾”
12X ¾”
12 X 1”
12X 1 1/8”
12 X 1 1/3”
8X 2”
8 X ¾”
12X 7/8”
12X 1 1/8”
12X 1 3/8”
12 X 1 5/8”
12X 2”
12X 7/8”
16 X 1”
16 X 1 ¼”
16 X 1 3/8”
12 x 1 7/8”
12 x 2 ½”
12 x 7/8”
16 x 1 1/8”
20 x 1 1/4"
20 x 1 3/8”
16 x 2”
12 x 2 ¾”
Torque (lbs.ft)
Coff. 0.11
80
70
86
194
243
397
80
140
250
480
740
1440
160
140
330
480
1000
3200
160
220
530
900
1680
3200
200
330
670
900
2620
6350
220
480
670
900
3200
9360
Torque (lbs.ft)
Coff. 0.13
90
80
100
225
281
460
90
160
281
550
860
1680
180
160
380
620
1160
3740
180
260
620
1050
1960
3740
230
380
770
1050
3060
7430
260
550
770
1160
3740
9980
Torque (lbs.ft)
Coff. 0.15
110
100
113
255
319
523
110
180
320
630
980
2000
200
180
430
700
1320
4280
200
280
700
1190
2240
4280
260
430
880
1190
3500
8520
290
630
880
1320
4280
11450
Page 14 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Table F-1 continued
NPS
Rating
14
150
300
600
900
1500
150
300
600
900
1500
150
300
600
900
1500
150
300
600
900
1500
150
300
600
900
1500
150
300
600
900
150
300
600
900
16
18
20
24
26
28
No. of Bolts X
Bolt Size
12 x 1”
20 x 1 1/8”
20 x 1 3/8”
20 x 1 ½”
16 x 2 ¼”
16 x 1”
20 x 1 ¼”
20 x 1 ½”
20 x 1 5/8”
16 x 2 ½”
16 x 1 1/8”
24 x 1 ¼”
20 x 1 5/8”
20 x 1 7/8”
16 x 2 ¾”
20 x 1 1/8”
24 x 1 ¼”
24 x 1 5/8”
20 x 2”
16 x 3”
20X 1 ¼”
24 X 1 ½”
24X 1 7/8”
20 X 2 ½”
16X 3 ½”
24 x 1 ¼”
28 x 1 5/8”
28 x 1 7/8”
20 x 2 ¾”
28 x 1 ¼”
28 x 1 5/8”
28 x 2”
20 x 3”
Torque (lbs.ft)
Coff. 0.11
330
430
900
1180
4130
290
590
1180
1680
5710
430
590
1510
2620
7660
430
590
1510
3200
9980
594
1052
2371
5734
16000
590
1350
2100
6810
590
1350
2560
8880
Torque (lbs.ft)
Coff. 0.13
380
490
1050
1370
4840
340
690
1370
1960
6690
490
690
1760
3060
8980
490
690
1760
3740
11710
685
1220
2760
6700
18800
690
1600
2450
7990
690
1570
2990
10410
Torque (lbs.ft)
Coff. 0.15
430
560
1190
1570
5540
380
780
1570
2240
7670
560
780
2010
3500
10300
560
780
2010
4280
13440
785
1400
3160
7700
21600
790
1790
2800
9160
790
1790
3420
11950
Page 15 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Table F-1 Continued
NPS
Rating
30
150
300
600
900
150
300
600
900
150
300
600
900
150
300
600
900
150
300
600
900
150
300
600
900
150
300
600
900
150
300
600
900
150
300
600
900
32
34
36
38
40
42
44
46
No. of Bolts X Bolt
Size
28 x 1 ¼”
28 x 1 ¾”
28 x 2”
20 x 3”
28 x 1 ½”
28 x 1 7/8”
28 x 2 ¼”
20 x 3 ¼”
32 x 1 ½”
28 x 1 7/8”
28 x 2 ¼”
20 x 3 ½”
32 x 1 ½”
32 x 2”
28 x 2 ½”
20 x 3 ½”
32 x 1 ½”
32 x 1 ½”
28 x 2 ¼”
20 x 3 ½”
36 x 1 ½”
32 x 1 5/8”
32 x 2 1/4”
24 x 3 ½”
36 x 1 ½”
32 x 1 5/8”
28 x 2 ½”
24 x 3 ½”
40 x 1 1/2"
32 x 1 3/4"
32 x 2 1/2"
24 x 3 3/4"
40 x 1 1/2"
28 x 1 7/8"
32 x 2 1/2"
24 x 4"
Torque (lbs.ft)
Coff. 0.11
590
1690
2560
8880
1050
2100
3680
11350
1050
2100
3680
14220
1050
2560
5080
14220
1050
1180
4140
14220
1050
1510
4140
14220
1050
1510
5710
14220
1050
1900
5710
17530
1050
2360
5710
21330
Torque (lbs.ft)
Coff. 0.13
690
1980
2990
10410
1220
2450
4300
13310
1220
2450
4300
16700
1220
3000
5950
16700
1220
1370
4840
16700
1220
1760
4840
16700
1220
1760
6690
16700
1220
2220
6690
20600
1220
2760
6690
25070
Torque (lbs.ft)
Coff. 0.15
790
2260
3420
11950
1400
2800
4930
15280
1400
2800
4930
19180
1400
3430
6820
19180
1400
1570
5540
19180
1400
2010
5540
19180
1400
2010
7670
19180
1400
2540
7670
23660
1400
3150
7670
28810
Page 16 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Table F-1 Continued
NPS
Rating
48
150
300
600
900
150
300
600
150
300
600
150
300
600
150
300
600
150
300
600
150
300
600
50
52
54
56
58
60
Note:
No. of Bolts X
Bolt Size
44 x 1 1/2"
32 x 1 7/8"
32 x 2 3/4"
24 x 4"
44 x 1 3/4"
32 x 2"
28 x 3"
44 x 1 3/4"
32 x 2"
32 x 3"
44 x 1 3/4"
28 x 2 1/4"
32 x 3"
48 x 1 3/4"
28 x 2 1/4"
32 x 3 1/4"
48 x 1 3/4"
32 x 2 1/4"
32 x 3 1/4"
52 x 1 3/4"
32 x 2 1/4"
28 x 3 1/2"
Torque (lbs.ft)
Coff. 0.11
1050
2360
6810
21330
1270
2560
9980
1270
2880
9980
1270
4130
9980
1270
4130
11340
1480
4130
12750
1480
4130
15990
Torque (lbs.ft)
Coff. 0.13
1220
2760
7990
25070
1480
2990
11710
1480
3370
11710
1480
4840
11710
1480
4840
13310
1730
4840
14970
1730
4840
18780
Torque (lbs.ft)
Coff. 0.15
1400
3150
9160
28810
1690
3420
13440
1690
3850
13440
1690
5540
13440
1690
5550
15280
1980
5550
17190
1980
5550
21570
(1) The bolt loads were calculated based on carbon steel flange with ASTM 193, B7 steel bolts.
Page 17 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Table F-2 – Torque Values for Isolating Gaskets (PIKOTEK)
on ASME B16.5 and ASME B16.47 Series A & B,
Class 150 through Class 2500 Flanges
Note:
Stud Bolt Size
inch
Torque Value
Ft-Lb
1/2
30
9/16
45
5/8
60
3/4
100
7/8
160
1
245
1-1/8
355
1-1/4
500
1-3/8
680
1-1/2
800
1-5/8
1100
1-3/4
1500
1-7/8
2000
2
2200
2-1/4
3180
2-1/2
4400
2-3/4
5920
3
7720
3-1/4
8400
3-1/2
9000
3-3/4
9600
4
10000
Torque values based on 30,000 psi tension load and 0.16 Friction Factor from
API BULL 5A2 thread compound. See Table-SAEP-351-01 Notes.
Commentary Notes:
a)
For ASME Class 900 through Class 2500, API-6B and API-6BX Class 2000 through Class 15000, and
RTJ Flanges, the maximum compressive stresses induced during installation should not exceed
25,000 psi. Design to 12,500 psi when possible.
b)
Calculations for compressive stresses applied during torque-up procedures must account for ring joint
grooves, gasket seal grooves, raised face diameters, and gasket inside diameter. (See PIKOTEK
Gasket User's manual).
c)
Bolt tensioning equipment may be used for class 900 and above resulting in a minimum residual bolt
stress of 30000 psi and a maximum of 50,000 psi. Refer to PIKOTEK Gasket User's manual for
specific bolting instructions.
Page 18 of 19
Document Responsibility: Piping Standards Committee
Issue Date: 1 December 2013
Next Planned Update: 1 December 2018
SAEP-351
Bolted Flange Joints Assembly
Table F-3 – Recommended Torque Values for Two-Piece, Four-Bolt Clamp Connector
Using B7/B7M Lubricated Bolting (Coefficient of friction=0.1)
Clamp Size (in)
Stud Bolt Size
(in)
Torque (ft-lbs)
Standard Clamp Sizes
2
0.750
55
3
0.750
65
4
0.875
100
5
1.000
160
6
1.125
210
8
1.250
300
Heavy Duty Series
2
0.875
136
3
0.875
163
4
1.000
190
8
1.375
529
10
1.625
949
12
1.750
1,220
Page 19 of 19