Torque pattern for 32 bolt flanges. The members have shown their interest in quality products by assisting independent standard-making and user organizations in the development ⦠The tightening torques stated are only valid for screws and nuts with oiled threads which are tightened by hand with a torque wrench. It ⦠Garlock SEALING TECHNOLOGIES an EnPro Industries company . Always use a torque wrench or other controlled-tensioning device for tightening. 5 . The thicker the gasket, the higher the gasket creep which in turn can result in torque loss. 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. The torque values are applicable for the type of gasket specified and bolts, nuts and washers should be free from damage, rust etc. see the following Installation Tips for more information on torque-to-yield bolts . All stud bolts of 7/8â³ and above shall be tightened using a torque wrench. Consequently always torque nuts in a cross bolt tightening pattern. Flange Bolt Torque Sequence. The following ⦠bolting torque table 2 - astm 193 grade b7 and astm 193 grade b16 stud bolts. Nominal Dia. 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) ⦠2 Foreword This technical note was developed and published with the technical help and financial support of the members of the Plastics Pipe Institute. If MOSâ lubricants are used, the values stated lose their validity. Driven-axle trailing ⦠All diagrams can be found in numerical sequence at the back of this publication . For lined and/or non-metallic raised face flanges consult the flange manufacturer to confirm the suitability of the values shown. 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. FIGURE 1 STUD (BOLT) TORQUE SEQUENCE . The nut factor is not the coefficient of friction. In addition to choosing the correct gasketing material, proper installation is crucial to ensure a leak free BFJA (Bolt Flange Joint Assembly). Bolt torque Specifications: Shown is the bolt tightening sequences for typical circular flanges. The first time around tighten to approximately 1/2 of the final torque, and then repeat the sequence, tightening to the suggested torque limit. * First round â 20% of final torque (flange sequential order) * Second round- 40% of final torque (flange sequential order) ... 8 or 24 bolt sequence. When torque loss reaches an extreme, the internal pressure exceeds the compressive force holding the gasket in place and a leak or blow ⦠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. Pre-tighten screws and nuts evenly by hand. 5* Screws and/or nuts must always be replaced when repair work is carried out. It ⦠Most of the bolt preload loss occurs within 24 hours after first tightening. Torque is the turning force measured in ⦠The nut factor is not the coefficient of friction. Torque Values are in ft.-lbs. Tightening Torque Clamp Load (Lbs.) The sequence in which bolts or studs are tightened has a substantial bearing upon the distribution of the assembly pressure on the gasket. bolting torque table 4 - use only with 6061-t6 aluminium flanges. TYPICAL FLANGE BOLT TIGHTENING SEQUENCE Gasket Bolts & Washers Nuts & Washers Flanged Component . 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. Torque Sequence Bolt Torque sequence is shown Below in Table 2. For bolt diameters greater than 1.25â, Hydraulic Tensioning is recommended to achieve more uniform gasket stress. Tightening Torque ⦠bolt tightening sequence, there is a payoff in reduced maintenance costs and increased safety. Polyethylene Flange Adapters, Metal Lap-Joint Flanges, and Bolt Set . lbs.) From there, hand tighten until they are snug against the flange. On standard ANSI raised face flanges a 1/16â thick gasket is normally recommended. 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. Number the bolts consecutively (clockwise) 1 through 280 starting with any bolt. note: although this diagram shows 24 bolts, the same basic procedure should be used with flanges having more or less bolts. -3- TABLE 1 RECOMMENDED TORQUE VALUES FLANGE RATING: CLASS 150 LINE SIZE BOLT SIZE NO. 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 ⦠bolting torque table 3 - use only with a193 b8, cl1 bolts at 540°c - 650°c on uninsulated flanges. 24-Inch Dia. 10 Bolt Pattern . Even though flange blot toque calculation is possible, they are normally selected from the pipe flange bolt torque chart. 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. Again to 100% of recommended torque. Then install and finger tighten all fasteners. For a Flange Gasket, Bolt and Torque Reference Chart, Click Here. The entire bolt pattern shall be tightened at least three times around the flange at 30%, 70%, and 100% of the torque value. Most commonly, when there are leaks in a flange, it is assumed that it is due to a âgasket failureâ however, that is rarely the case. Consultation of a technician should be sought if in any doubt. 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. Do not fully tighten the bolts the first time around as this can tilt the flange out of parallel. bolting torque table 2a - cold service astm a320 grade l7 stud bolts. Thinner gasket materials can take a higher gasket load and ⦠⦠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.) Then tighten in this order: 1, (1+n/2), (1+n/4), (1+3n/4) where n is the number of bolt holes. Again to approximately 75% of recommended torque. Title: 12 Bolt Flange Torque Pattern Author: Garlock Created Date: 3/24/2014 2:29:07 PM BOLTS TORQUE ⦠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 ⦠Garlock Bolt Torque ⦠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. Always run the nuts or bolts ⦠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 ⦠Flange Bolt Tightening Sequence Proper gasket thickness is also important. 1 The maximum recommended gasket stress on Multi-Swell⢠3760 is 10,000psi. Number the bolts/flange according to the Bolt Torque Sequence. TIGHTENING SEQUENCE: 1) Step 1 â 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. Forged Steel Pipe Fittings NPT - ANSI B16.11 Class 2000/3000 The ⦠The relationship between applied ⦠Flange torque sequence image: Each lookup shows the correct flange torque sequence image in picture form, with the studs numbered. 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. Recommended Torque (ft. 2) Step 2 â Set the torque wrench to 1/3 of the target torque value and tighten in an order, bolts 1, 2, Flange Installation. And always make sure youâve used the correct sequence in your bolt tightening procedure: For four and eight-bolt flanges: 1 st round â 30 percent of final torque; 2 nd round â 60 percent of final torque; 3 rd round â 100 percent of final torque CAUTION: UNNECESSARY OVER TORQUING WILL DAMAGE THE FLANGE. 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 ⦠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 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. Bolt Torque . Final tightening by torque wrench. These include variations in the nut factor; bolt, flange and nut condition; equipment calibration and condition; perpendicularity of the bolt, nut and flange; etc. notice: trojan gaskets, do not grease seal prior to installation 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. While tightening the bolt with torque wrenches (for pipe / Manway flanges) ensure that tightening load to each bolt is applied as uniformly as possible. Flange Bolt Torques The following charts indicate the approximate bolt torque required to seal flanged joints against internal pressure. 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.) 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 possible, re-torque after 24 hours. 3. This article explores bolt torque and the major considerations for converting measurable bolt torque into the gasket load necessary to seal a flanged connection. 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. The âTorque Sequenceâ column shows which diagram to use as the specific bolt torquing sequence for your engine . Start at bolt number one, locate the bolt 180° from bolt ⦠Flange Size (in.) and assume new A193 Gr. Repeat this process until nuts do not move under 100% recommended torque. (in.) Lubricant should not be applied to the gasket or flange faces as a release agent. how To use The fel-pro® Torque Tables⢠ENGINE YEARS FT.-LBS. 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