Then tighten in this order: 1, (1+n/2), (1+n/4), (1+3n/4) where n is the number of bolt holes. 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. 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. It … 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 … These include variations in the nut factor; bolt, flange and nut condition; equipment calibration and condition; perpendicularity of the bolt, nut and flange; etc. All stud bolts of 7/8″ and above shall be tightened using a torque wrench. It … 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 Torque Sequence Bolt Torque sequence is shown Below in Table 2. Title: 12 Bolt Flange Torque Pattern Author: Garlock Created Date: 3/24/2014 2:29:07 PM bolting torque table 2 - astm 193 grade b7 and astm 193 grade b16 stud bolts. Final tightening by torque wrench. Forged Steel Pipe Fittings NPT - ANSI B16.11 Class 2000/3000 Most commonly, when there are leaks in a flange, it is assumed that it is due to a “gasket failure” however, that is rarely the case. Garlock Bolt Torque … TIGHTENING SEQUENCE: 1) Step 1 – Liberally lubricate all load bearing surfaces including threads and flat washers. All diagrams can be found in numerical sequence at the back of this publication . On standard ANSI raised face flanges a 1/16” thick gasket is normally recommended. For bolt diameters greater than 1.25”, Hydraulic Tensioning is recommended to achieve more uniform gasket stress. 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 … Threads per inch 307A ASTM A307 Grade A SAE J429 Grade 5 SAE J429 Grade 8 F N L G 9 FNL Grade 9 Clamp Load (Lbs.) The entire bolt pattern shall be tightened at least three times around the flange at 30%, 70%, and 100% of the torque value. For lined and/or non-metallic raised face flanges consult the flange manufacturer to confirm the suitability of the values shown. Lubricant should not be applied to the gasket or flange faces as a release agent. The relationship between applied … 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.) BOLTS TORQUE … 24 2945 5140 8340 12500 Notes: Torque Values are in ft.-lbs., and assume Alloy Steel Bolts (A193 B7 w/ 2H Nuts) with oil/graphite lubrication. 24-Inch Dia. TORQUE-TENSION REFERENCE GUIDE Printed in U.S.A. • Supply Part Number: 9702365 • AS 06/14 Torque Poster For additional technical information, contact Fastenal Engineering at engineer@fastenal.com. bolting torque table 4 - use only with 6061-t6 aluminium flanges. 5* Screws and/or nuts must always be replaced when repair work is carried out. FIGURE 1 STUD (BOLT) TORQUE SEQUENCE . Repeat this process until nuts do not move under 100% recommended torque. Number the bolts consecutively (clockwise) 1 through 280 starting with any bolt. TYPICAL FLANGE BOLT TIGHTENING SEQUENCE Gasket Bolts & Washers Nuts & Washers Flanged Component . 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. For flanges with more than 32 bolts, tighten the bolts in groups of 3 adjacent bolts following the sequence for a 12 bolt flange.. For flanges with 40 or more bolts, tighten the bolts in adjacent groups of 4, bolts sequenced as the number of bolts divided by 4. 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. Flange Size (in.) Tightening Torque Clamp Load (Lbs.) Do not fully tighten the bolts the first time around as this can tilt the flange out of parallel. CLASS FLANGES BOLT TORQUE LOADS ... 24 (600) 20 x 1-1/4 2 575 (780) 725 (985) 24 (600) 24x 1-1/2 2-3/8 785 (1065) 995 (1350) 24 (600) 24 x 1-7/8 2-15/16 1850 (2505) 2360 (3200) 30 (750) 28 x 1-1/4 2 360 (490) 455 (615) 30 (750) 28 x 1-3/4 2-3/4 1210 (1640) 1545 (2095) 30 (750) 28 x 2 3-1/8 2185 (2960) 2790 (3780) 36 (900) 32 x 1-1/2 2-3/8 630 (855) 800 (1085) 36 (900) … Consultation of a technician should be sought if in any doubt. 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. Then install and finger tighten all fasteners. and assume new A193 Gr. This article explores bolt torque and the major considerations for converting measurable bolt torque into the gasket load necessary to seal a flanged connection. From there, hand tighten until they are snug against the flange. 2) Step 2 – Set the torque wrench to 1/3 of the target torque value and tighten in an order, bolts 1, 2, Pre-tighten screws and nuts evenly by hand. 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.) lbs.) Number the bolts/flange according to the Bolt Torque Sequence. For a Flange Gasket, Bolt and Torque Reference Chart, Click Here. bolting torque table 2a - cold service astm a320 grade l7 stud bolts. If possible, re-torque after 24 hours. Nominal Dia. The sequence in which bolts or studs are tightened has a substantial bearing upon the distribution of the assembly pressure on the gasket. Polyethylene Flange Adapters, Metal Lap-Joint Flanges, and Bolt Set . The thicker the gasket, the higher the gasket creep which in turn can result in torque loss. Consequently always torque nuts in a cross bolt tightening pattern. Thinner gasket materials can take a higher gasket load and … Torque Values are in ft.-lbs. Always use a torque wrench or other controlled-tensioning device for tightening. When torque loss reaches an extreme, the internal pressure exceeds the compressive force holding the gasket in place and a leak or blow … The nut factor is not the coefficient of friction. Clover Pipelines Pt Ltd olutions@cloverpipe.com.au : 03) 8373 8000 overpipe.com.au 2 INSTALLATION GUIDE ESTIMATED TIGHTENING TORQUE VALUES STANDARD PRESSURE FLANGES AS 4087 FIGURE B5 PN16 NOMINAL SIZE (DN) BOLT SIZE NUMBER OF BOLTS SUGGESTED LENGTH OF BOLTS (mm) BOLT … (in.) Driven-axle trailing … Flange Installation. The first time around tighten to approximately 1/2 of the final torque, and then repeat the sequence, tightening to the suggested torque limit. Always run the nuts or bolts … * First round – 20% of final torque (flange sequential order) * Second round- 40% of final torque (flange sequential order) ... 8 or 24 bolt sequence. The torque values are applicable for the type of gasket specified and bolts, nuts and washers should be free from damage, rust etc. 3. Flange torque sequence image: Each lookup shows the correct flange torque sequence image in picture form, with the studs numbered. notice: trojan gaskets, do not grease seal prior to installation Torque pattern for 32 bolt flanges. 5 . … how To use The fel-pro® Torque Tables™ ENGINE YEARS FT.-LBS. The tightening torques stated are only valid for screws and nuts with oiled threads which are tightened by hand with a torque wrench. bolt tightening sequence, there is a payoff in reduced maintenance costs and increased safety. The nut factor is not the coefficient of friction. Most of the bolt preload loss occurs within 24 hours after first tightening. The torques given are based on using a 3mm thick 70 IRHD rubber gasket. The … 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. the amount of force applied to any particular flange arrangement. -3- TABLE 1 RECOMMENDED TORQUE VALUES FLANGE RATING: CLASS 150 LINE SIZE BOLT SIZE NO. 10 Bolt Pattern . These include variations in the nut factor; bolt, flange and nut condition; equipment calibration and condition; perpendicularity of the bolt, nut and flange; etc. If MOS₂ lubricants are used, the values stated lose their validity. Even though flange blot toque calculation is possible, they are normally selected from the pipe flange bolt torque chart. Flange Bolt Torque Sequence. Torque is the turning force measured in … 1 The maximum recommended gasket stress on Multi-Swell™ 3760 is 10,000psi. tighten the bolts to 30% of the final torque and repeat to 50%-60% of final and then proceed with final torque using the same sequence for all levels. Bolt Torque . see the following Installation Tips for more information on torque-to-yield bolts . Again to 100% of recommended torque. note: although this diagram shows 24 bolts, the same basic procedure should be used with flanges having more or less bolts. While tightening the bolt with torque wrenches (for pipe / Manway flanges) ensure that tightening load to each bolt is applied as uniformly as possible. Start at bolt number one, locate the bolt 180° from bolt … The “Torque Sequence” column shows which diagram to use as the specific bolt torquing sequence for your engine . Proper gasket thickness is also important. CAUTION: UNNECESSARY OVER TORQUING WILL DAMAGE THE FLANGE. The following … bolting torque table 3 - use only with a193 b8, cl1 bolts at 540°c - 650°c on uninsulated flanges. Bolt torque Specifications: Shown is the bolt tightening sequences for typical circular flanges. Garlock SEALING TECHNOLOGIES an EnPro Industries company . Flange Bolt Torques The following charts indicate the approximate bolt torque required to seal flanged joints against internal pressure. Again to approximately 75% of recommended torque. 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 Torque … In addition to choosing the correct gasketing material, proper installation is crucial to ensure a leak free BFJA (Bolt Flange Joint Assembly). Recommended Torque (ft. The combined effects of bolt relaxation, (approximately 10% during the first 24 hours after installation), gasket creep, vibration in the system, thermal expansion and elastic interaction during bolt tightening contribute to torque loss. Flange Bolt Tightening Sequence The members have shown their interest in quality products by assisting independent standard-making and user organizations in the development … 2 Foreword This technical note was developed and published with the technical help and financial support of the members of the Plastics Pipe Institute. 1/2 - 1-1/2 12 2 - 4 25 530 6 - 8 40 10 64 12 95 14 - 24 110 Table 1 6 1 8 4 5 3 7 2 1 2 4 3 11 7 3 … Has a substantial bearing upon the distribution of the bolt torque into the gasket creep which turn... Costs and increased safety … Again to approximately 75 % of torque sequence for 24 bolt flange values... €“ Liberally lubricate all load bearing surfaces including threads and flat washers maintenance costs increased! 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