api flange bolting torque chart

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Flouropolymer Coated Bolt TorqueMarch 19, 2010 by Sigma Fasteners · Leave a Comment

API 6A is an International Standard which specifies requirements and gives recommendations for theperformance, dimensional and functional interchangeability, design, materials, testing, inspection,welding, marking, handling, storing, shipment, purchasing, repair and re-manufacture of wellhead andwell tree equipment for use in the petroleum and natural gas industries.

Download Torque Value Chart

API Flange Bolting Torque Chart http://www.sigmafasteners.com/tag/ptfe-coated-bolts

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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 Strength2 1/2″ and under – tensile 125 ksi; yield strength 105 ksiOver 2 1/2″ to 4″ – tensile 115 ksi; yield 95 ksiOver 4″ to 7″ – tensile 100; yield 75 ksi

ASTM A320 L7 Tensile and Yield StrengthOnly 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 PTFE Coated Bolt coefficient of Friction Plain Bolt coefficient of Friction

Size Ibf Torque Torque Torque Torque

Inch 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

1″ 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


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4″ 561108 22683 16730 41057 30282

*This chart is for general practice purposes only and should not be in the engineering or design of anyproducts. The most current edition of the API specification may be obtained on the API Standards websiteto make sure you have the most current edition of API 6A. For most the accurate references in criticalsituations torque values should be replaced with field measured tension values. Accurate stud tension isdifficult 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 canchange friction and thereby the expected outcome.

Filed under Coated Bolts, Stud Bolts · Tagged with Coated Bolt Torque Values, Coated Bolts, PTFECoated Bolts, Teflon Coated Bolts, Xylan Coated Bolts

Xylan Coated BoltsFebruary 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 centurynow. Most major Oil and Chemical Companies recognizing that maintenance is a huge issue have madecoated bolt specifications for bolted high pressure flange connections. The various properties on theXylan give excellent make up and brake out torque and reduce the need for high risk cutting torches orhigh 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 the lubricity and chemical inertness.

With VOCs an ever present issue these days Whitford has made a low VOC version 1424 which Sigmaapplies to achieve the results need in a coated bolt connection and to stay complaint in a green economy.


3 de 8 19-07-2012 17:56

Xylan coated bolts come in many tints and the coated bolts are often coordinated with standard corporatecolor branding schemes. While very light shades are possible most of the popular hues range from a DarkYellow 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, CoatedBolts, PTFE Coated Bolts, Xylan Coated Bolt, Xylan Coated Bolts, Xylan Coating

Xylan CoatingFebruary 6, 2010 by Sigma Fasteners · Leave a Comment

Xylan Industrial Coating Service

Xylan coating prevents leaks past threadPressure vessels, valves, pipe unions, storage tanks, reactors, pipelines and other fluid containmentequipment 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 touse. 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 breakouttorques, 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 andalloys.

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 1010contains significantly more bonding resin relative to its content of PTFE lubricant. Altering the formula inthis 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

Xylan 1052

Main Properties:

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


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

Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Thermoset. Wide usetemperature. 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 extremepressures, up to 150,000 psi (10,500 kg/cm2). The coating utilizes a unique dual lubrication system ofPTFE 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

Xylan 1070

Main Properties:

High temperature resistant. Low coefficient of friction. Abrasion / wear resistant. Thermoset. Wide usetemperature. Corrosion resistant. Controlled torque.

Typical Applications: Threaded fasteners.

Description: Resin-bonded, thermosetting, PTFE based, dry-film lubricant. It has extra corrosionprotection and issued to coat large studs (B7), nuts, flanges, and related hardware for sub-sea andsplash-zone service. Because of its predictable, low-friction properties, less make-up torque is required toproduce the specified tension. During assembly, clamp loads are increased; scatter is reduced. In fact, thefrictional characteristics are the most predictable of any lubricant, coating, or plating used on bolting. Thelow friction properties also reduce break-out torque, which allows removal of bolting with a wrenchinstead of a blowtorch.Application: Conventional spray.

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

Xylan 1400

Main Properties:

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 processingequipment from chemical exposure (especially those with high pH). Although it contains a smallpercentage of PTFE lubricant to facilitate installation and prevent galling, it is considered a barriercoating rather than a dry film lubricant.


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

Xylan 1424

Main Properties:

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 coatingis 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°FWorking 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 CoatedBolts, Xylan, Xylan 1014, Xylan 1052, Xylan 1070, Xylan 1400, Xylan 1424, Xylan Coated Bolts, XylanCoating

Coated BoltsFebruary 6, 2010 by Sigma Fasteners · Leave a Comment

Sigma Fasteners manufacturers coated studs to meet major Chemical and Oil Company standards. Sizesrange 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-treatmentlayer. Phosphate Pre-treatment technique insures the physical performance of product without changingand 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 bedifferent per customers request to meet various environmental working conditions.


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XylanSermaGardTeflonPTFEMoly

Xyan combined with an advanced treatment technology; the film is thin but is excellent in corrosionresistance which prolongs the lifespan of the product. Non-stick and low friction properties can make-upthe torque coefficient which is easy to install and disassembling. Property of chemical & weatherresistance make it suitable to various severe environments.

Xyaln and SermaGard coatings are the best choice in offshore, oilfield and petrochemical precisionequipment against corrosion. Its properties are particularly suitable for surface corrosion prevention ofunderwater 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, TeflonCoated Bolts, Xylan Coated Bolts, Zinc Plated Bolts

Produts and Services

Coated BoltsCustom BoltsFastenersIndustrial Coating ServiceStainless BoltsStandard BoltsStud 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


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Stainless Bolt Molybdenum Disulfide Moly Coated Bolts Monel Bolt Monel Bolts Nitronic

60 PTFE 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 Stud Bolts Teflon

Coated Bolts Xylan Coated Bolts Xylan Coating Zinc Plated Bolts

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api flange bolting torque chart

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