API Flange Bolting Torque Chart

API Flange Bolting Torque Chart

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Flouropolymer Coated Bolt Torque March 19, 2010 by Sigma Fasteners · Leave a Comment API 6A is an International Standard which specifies requirements and gives recommendations for the performance, dimensional and functional interchangeability, interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment, purchasing, repair and re-manufacture of wellhead and well tree equipment for use in the petroleum and natural gas i ndustries.

Download Torque Value Chart

PI Flange Bolting Torque Chart


Covering bolts on Wellhead Equipment, Valves and chokes, and loose flanged connectors.

TORQUE FOR FLANGE BOLTING (B7/L7 STUDS)*

ANSI / API 6A / ISO 10423:2003 Feb. 1, 2005

ASTM A193 Grade B7 Tensile and Yield Strength 2 1/2 and under – tensile 125 ksi; yield strength 105 ksi Over 2 1/2 to 4 – tensile 115 ksi; yield 95 ksi Over 4 to 7 – tensile 100; yield 75 ksi ″

″

″

″

″

ASTM A320 L7 Tensile and Yield Strength Only covers 2 1/2 and under - tensile 125 ksi; yield strength 105 ksi ″

Source: API 6-A, 19th Appendix D, Table D1 & D2

Stud Diameter

Tension

Size

Ibf

Inch

P TF E Co at ed Bo lt co ef fi ci ent of Fr ic ti on

Pl ai n Bo lt coe ff ic ie nt of Fri ct io n

Torque

Torque

Torque

Torque

Nm

Ft. lbs

Nm

Ft. lbs

f =0.07

f =0.07

f =0.13

f =0.13

1/2

″

7450

48

35

80

59

5/8

″

11865

92

68

155

115

3/4

″

17559

160

118

270

200

7/8

″

24241

253

188

429

319

31802

376

279

639

474

1 1/8

41499

540

401

925

686

1 1/4

52484

745

553

1285

953

1 3/8

64759

996

739

1727

1281

1 1/2

78322

1297

962

2261

1677

1 5/8

93173

1653

1226

2894

2146

1 3/4

109313

2069

1534

3636

2696

1 7/8

126741

2549

1890

4493

3332

2

145458

3097

2297

5476

4061

2 1/4

186758

4418

3276

7851

5822

2 1/2

233212

6068

4500

10828

8030

2 5/8

233765

6394

4716

11429

8430

2 3/4

257694

7354

5424

13168

9712

3

309050

9555

7047

17156

12654

3 1/4

365070

12154

8965

21878

16136

3 3/4

491099

18685

13782

33766

24905

3 7/8

525521

20620

15208

37293

27506

1

″

″

″

″

″

″

″

″

″

″

″

″

″

″

″

″

″


4

″


561108

22683

16730

41057

30282

*This chart is for general practice purposes only and should not be in the engineering or design of any products. The most current edition of the API specification may be obtained on the API Standards website to make sure you have the most current edition of API 6A. For most the accurate references in critical situations torque values should be replaced with field measured tension values. Accurate stud tension is difficult to attain using torque, because friction has a significant effect on the torque–tension relationship. Any thread damage (however minor), additional lubrication, or standard deviations within the range can change friction and thereby the expected outcome. Filed under Coated Bolts, Stud Bolts · Tagged with Coated Bolt Torque Values, Coated Bolts, PTFE Coated Bolts, Teflon Coated Bolts, Xylan Coated Bolts

Xylan Coated Bolts February 19, 2010 by Sigma Fasteners · Leave a Comment

Coated Stud Bolts Xylan Coated Stud Bolts Xylan 1010, 1070, 1014, 1052 and now 1424 have been used as bolt coatings for almost a quarter century now. Most major Oil and Chemical Companies recognizing that maintenance is a huge issue have made coated bolt specifications for bolted high pressure flange connections. The various properties on the Xylan give excellent make up and brake out torque and reduce the need for high risk cutting torches or high cost bolt cutting when maintenance is required. Xylan 1014 in bolt coatings used for its good lubricity, chemical and abrasion resistance. Xylan 1052 for coated bolts used for its excellent lubricity. Xylan 1070 and 1010 where the pioneers in the field – used for t he lubricity and chemical inertness. With VOCs an ever present issue these days Whitford has made a low VOC version 1424 which Sigma applies to achieve the results need in a coated bolt connection and to stay complaint in a green economy.



Xylan coated bolts come in many tints and the coated bolts are often coordinated with standard corporate color branding schemes. While very light shades are possible most of the popular hues range from a Dark Yellow to black with Reds and Blues and greens being the most widespread. Filed under Coated Bolts, Custom Bolts, Stud Bolts · Tagged with Bolt Coatings, Coated Bolt, Coated Bolts, PTFE Coated Bolts, Xylan Coated Bolt, Xylan Coated Bolts, Xylan Coating

Xylan Coating February 6, 2010 by Sigma Fasteners · Leave a Comment

Xylan Industrial Coating Service Xylan coating prevents leaks past thread Pressure vessels, valves, pipe unions, storage tanks, reactors, pipelines and other fl uid containment equipment are often fitted with threaded plugs for inspection, pressure relief, filling or tapping.

Coatings on pipe plugs not only improve their performance and reliability but also make them easier to use. A thin film of Xylan eliminates the PTFE tape normally wrapped around the threads to seal them. In addition, the corrosion protection and low-friction properties of the coating greatly reduce breakout torques, enabling users to remove the plugs at a later date without destroying them. In most instances, the pipe plugs may be re-used without difficulty. Xylan coatings are also available in many colors, enabling users to color-code particular plug sizes and alloys.

Xylan 1014 Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Dry film lubricant. Thermoset. Wide use temperature. Typical Applications: Any mating surface which requires lubrication. Hinge pins. Piston casing. Compressors. Fasteners. Description: Resin-bonded, thermosetting, dry-film lubricant which, when compared to Xylan 1010 contains significantly more bonding resin relative to its content of PTFE lubricant. Altering the formula in this manner produces finishes which are harder, more abrasion resistant, glossier, and less porous. Frictional values remain low and very predictable.

Working temp. range (continuous) -195°C/-320°F to 260/500°F Working temp. range (intermittent) -195°C/-320°F to 285°C/545°F


High temperature resistant. High load carrying capacity. Abrasion / wear resistant. Thermoset.



Typical Applications: Applications to prevent wear of mating surfaces under extreme load such as bearings, sealing rings, and valve springs. Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Thermoset. Wide use temperature. Corrosion resistant. Controlled torque. Typical Applications: Threaded fasteners. Description: Resin-bonded, thermosetting, dry film lubricant. It is formulated for high-pressure, low-speed wear applications and provides long-term lubrication for bearing surfaces subjected to extreme pressures, up to 150,000 psi (10,500 kg/cm2). The coating utilizes a unique dual lubrication system of PTFE and MoS2 and is superior to moly greases which wash away and PTFE coatings which cold flow. Resin-bonded lubricants in Xylan 1052 stay on the job, even in harsh chemical environments.

Working temp. range (continuous) -195°C/-320°F to 260°C/500°F Working temp. range (intermittent) -195°C/-320°F to 285°C/545°F


High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Thermoset. Wide use temperature. Corrosion resistant. Controlled torque. Typical Applications: Threaded fasteners. Description: Resin-bonded, thermosetting, PTFE based, dry-film lubricant. It has extra corrosion protection and issued to coat large studs (B7), nuts, flanges, and related hardware for sub-sea and splash-zone service. Because of its predictable, low-friction properties, less make-up torque is required to produce the specified tension. During assembly, clamp loads are increased; scatter is reduced. In fact, the frictional characteristics are the most predictable of any lubricant, coating, or plating used on bolting. The low friction properties also reduce break-out torque, which allows removal of bolting with a wrench instead of a blowtorch. Application: Conventional spray.

Working temp. range (continuous) -195°C/-320°F to 260°C/500°F Working temp. range (intermittent) -195°C/-320°F to 285°C/545°F


Corrosion resistant. Chemical resistant. Weathering resistant. Acid rain resistant. Typical Applications: Threaded fasteners for the building, chemical process, oil and off shore industries. Description: A recoatable “RC” coating developed to protect large fasteners and chemical processing equipment from chemical exposure (especially those with high pH). Although it contains a small percentage of PTFE lubricant to facilitate installation and prevent galling, it is considered a barrier coating rather than a dry film lubricant.



Working temp. range (continuous) -50°C/-58°F to 175°C/350°F


Dry film lubricant. Corrosion resistant. Typical Applications: Any mating surface which requires lubrication. Hinge pins. Piston casing. Compressors. Threaded fasteners. Description: This VOC compliant*, resin-bonded, PTFE based coating is primarily formulated for use on fasteners to prevent corrosion and facilitate make-up torque.

Working temp. range (continuous) -50°C/-58°F to 175°C/347°F Working temp. range (intermittent) -50°C/-58°F to 200°C/392°F More Xylan Inforamation Filed under Industrial Coating Service · Tagged with Coated Bolts, PTFE Coated Bolts, Teflon Coated Bolts, Xylan, Xylan 1014, Xylan 1052, Xylan 1070, Xylan 1400, Xylan 1424, Xylan Coated Bolts, Xylan Coating

Coated Bolts February 6, 2010 by Sigma Fasteners · Leave a Comment Sigma Fasteners manufacturers coated studs to meet major Chemical and Oil Company standards. Sizes range from 1/2 inch – 3 1/2 and larger.

Coated Stud Bolts Sigma coated bolts have a two-layer structure of special pretreatment polymer film and under-treatment layer. Phosphate Pre-treatment technique insures the physical performance of product without changing and fluropolymer top coating results in a better performance in resisting chemical and seawater corrosion. SermaGard coating is different from PTFE because of their strong corrosion resistant ability. Xylan can be different per customers request to meet various environmental working conditions.



Xylan SermaGard Teflon PTFE Moly Xyan combined with an advanced treatment technology; the film is thin but is excellent in corrosion resistance which prolongs the lifespan of the product. Non-stick and low friction properties can make-up the torque coefficient which is easy to install and disassembling. Property of chemical & weather resistance make it suitable to various severe environments. Xyaln and SermaGard coatings are the best choice in offshore, oilfield and petrochemical precision equipment against corrosion. Its properties are particularly suitable for surface corrosion prevention of underwater precision equipment including Christmas tree, BOP and pipelines and other parts. Xylan coating properties: Low friction ( as low as 0.055) Remarkable adhesion Unusual resistance to wear and abrasion Excellent resistance to corrosion Resistance to chipping Resistance to the elements: weather, sunlight, salt water Working temperature range from: -190 to + 260° C Available in a wide range of colors

Filed under Custom Bolts · Tagged with Coated Bolts, Moly Coated Bolts, PTFE Coated Bolts, Teflon Coated Bolts, Xylan Coated Bolts, Zinc Plated Bolts Produts and Services

Coated Bolts Custom Bolts Fasteners Industrial Coating Service Stainless Bolts Standard Bolts Stud Bolts Nuts and Bolts

304 Stainless Bolts 316 Stainless Bolt 316 Stainless Steel Bolt 660 ASTM Bolt Bolts Stud Coated

Bolts Custom Bolts Custom Fasteners Double End Studs

Duplex Stainless Flange Bolting High Pressure Bolting Inconel Bolt Inconel Bolts Metric


Stainless Bolt


Molybdenum Disulfide Moly

60 PTFE

Coated Bolts Monel Bolt Monel Bolts Nitronic

Coated Bolts SermaGard 1105 SermaGard 1280 SermaGard Coated Bolts

SermaGard Coating Specialty

Bolt Specialty Bolts Stainless Bolt Stainless Bolting Stainless

Carriage Bolt Stainless Carriage Bolts Stainless Hex Bolt Stainless Nuts and Bolts Stainless Steel Carriage Bolt Stainless Steel Carriage Bolts Stainless Steel Hex Bolts Stainless Steel Metric Bolts Stainless Steel Nuts and Bolts Stainless U Bolt

Coated Bolts Xylan

Stud Bolts Teflon

Coated Bolts Xylan Coating Zinc Plated Bolts

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API Flange Bolting Torque Chart

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