Nominal Dia. When torque loss reaches an extreme, the internal pressure exceeds the compressive force holding the gasket in place and a leak or blow … The entire bolt pattern shall be tightened at least three times around the flange at 30%, 70%, and 100% of the torque value. Then tighten in this order: 1, (1+n/2), (1+n/4), (1+3n/4) where n is the number of bolt holes. Flange Bolt Torques The following charts indicate the approximate bolt torque required to seal flanged joints against internal pressure. Forged Steel Pipe Fittings NPT - ANSI B16.11 Class 2000/3000 Garlock SEALING TECHNOLOGIES an EnPro Industries company . Start at bolt number one, locate the bolt 180° from bolt … bolting torque table 4 - use only with 6061-t6 aluminium flanges. Instant flange bolt sizes and torque patterns: Just enter the flange size, class, and type and the app instantly populates the correct values from the flange bolt size chart and the flange torque sequence chart, along with wrench size. TIGHTENING SEQUENCE: 1) Step 1 – Liberally lubricate all load bearing surfaces including threads and flat washers. The torques given are based on using a 3mm thick 70 IRHD rubber gasket. Bolt sequence: 1, 25, 17, 9, 5, 13, 21, 29, 3, 27, 19, 11, 7, 15, 23, 31, 2, 26, 18, 10, 6, 14, 22, 30, 4, 28, 20, 12, 8, 16, 24, 32. BOLTS TORQUE … notice: trojan gaskets, do not grease seal prior to installation The values in the tables are based on the equation: T = Torque value, (ft-lbs) F = Bolt pre-load, (lbs) k = Nut Factor based on lubricant used d = Nominal bolt diameter, (in.) Again to approximately 75% of recommended torque. Repeat this process until nuts do not move under 100% recommended torque. B7 studs with 2H heavy hex nuts; with studs, nuts and the nut bearing surfaces lubricated with a never-seize type paste (k = 0.17) using the installation and bolt tightening practices outlined on this website or the Durlon Technical Handbook. The following … Flange Installation. flange attached pipe fitting and or valve must be supported properly to eliminate stress on the plastic flange torque sequence chart bolt information table, torque device set to the appropriate assembly torque for different types of bolt and bolt tension as given in the following tables in this technical standard this assembly torque is designed to achieve a preloading in the bolt … The thicker the gasket, the higher the gasket creep which in turn can result in torque loss. Final tightening by torque wrench. Consequently always torque nuts in a cross bolt tightening pattern. The … Bolt Torque . Hand tighten bolts; Torque bolts in diagonal sequence in small increments to the appropriate torque level * - refer to the figure and tables on this page * In general, torque values for soft metal ports/manifolds (such as aluminum block) are 66% of torque specified in the tables on this page. Bolt torque Specifications: Shown is the bolt tightening sequences for typical circular flanges. TYPICAL FLANGE BOLT TIGHTENING SEQUENCE Gasket Bolts & Washers Nuts & Washers Flanged Component . bolt tightening sequence, there is a payoff in reduced maintenance costs and increased safety. bolting torque table 3 - use only with a193 b8, cl1 bolts at 540°c - 650°c on uninsulated flanges. Torque Values are in ft.-lbs. 24-Inch Dia. bolting torque table 2 - astm 193 grade b7 and astm 193 grade b16 stud bolts. If MOS₂ lubricants are used, the values stated lose their validity. Lubricant should not be applied to the gasket or flange faces as a release agent. Driven-axle trailing … And always make sure you’ve used the correct sequence in your bolt tightening procedure: For four and eight-bolt flanges: 1 st round – 30 percent of final torque; 2 nd round – 60 percent of final torque; 3 rd round – 100 percent of final torque Tightening Torque … bolting torque table 2a - cold service astm a320 grade l7 stud bolts. Thinner gasket materials can take a higher gasket load and … Title: 12 Bolt Flange Torque Pattern Author: Garlock Created Date: 3/24/2014 2:29:07 PM Industrial Gaskets reserves the right to change or modify any of its products, no liability is entered into or given on any of the data provided. For a Flange Gasket, Bolt and Torque Reference Chart, Click Here. * First round – 20% of final torque (flange sequential order) * Second round- 40% of final torque (flange sequential order) ... 8 or 24 bolt sequence. Tightening Torque Clamp Load (Lbs.) Do not fully tighten the bolts the first time around as this can tilt the flange out of parallel. -3- TABLE 1 RECOMMENDED TORQUE VALUES FLANGE RATING: CLASS 150 LINE SIZE BOLT SIZE NO. see the following Installation Tips for more information on torque-to-yield bolts . 1 The maximum recommended gasket stress on Multi-Swell™ 3760 is 10,000psi. 3. The relationship between applied … 24 24.00 27.25 130.75 20 1.25 1000 55740 8526 <300 2500 293 8526 1000 NOTE: The values shown above are based on raised face metallic flanges. Recommended Torque (ft. lbs.) For lined and/or non-metallic raised face flanges consult the flange manufacturer to confirm the suitability of the values shown. This Document is the property of Flexitallic US, LLC and is not to be reproduced, transmitted to another, nor used for the purpose of manufacturing of articles for sale to anyone but Flexitallic US, LLC without Flexitallic's specific … In addition to choosing the correct gasketing material, proper installation is crucial to ensure a leak free BFJA (Bolt Flange Joint Assembly). Flange Size (in.) Again to 100% of recommended torque. The torque values are applicable for the type of gasket specified and bolts, nuts and washers should be free from damage, rust etc. However, applied torque on the flange bolts can be measured and controlled and is one of the most frequently used methods to control gasket load. 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