The ease. Provides simple & safe method for ensuring controlled tightening and loosening of bolts; High revenue generating service with less investment ; Global contract with SABIC and its affiliates and Saudi ARAMCO will be an advantage ; Required equipments available with AFI bolt torque tightening procedures . The bolt tensioner is fitted over the stud Step 2.. For critical and applications involving higher accuracy, most customers prefer Mechanical tensioning with Superbolt multi-jackbolt tensioners. The length of cable you spool out also affects the power of the pull A bolt circle of 4x100 would indicate a 4-lug pattern on a circle with a diameter of 100mm Those systems do not change the amount of force required to move a load Calculation on the inner force of bonding bolts in the ground anchor engineering according to Winkler's assumption. Ideal for critical service, high pressure, and challenging sealing applications. 23 torque tighting do or do not . Youll typically see hydraulic tensioning used on fasteners with 2 bolt diameter or greater, but they can operate on studs as small as bolt diameter.. Tensioners are common in subsea (both topside and underwater), wind turbine,. Depending on the size of the bolts and the requirements of the project, the tightening of the bolts can be done using different techniques, tightening the nuts or by tensioning the bolts with a hydraulic bolt tensioner. With our state of the art hydraulic accessories, Nut and washer, Reaction Washer and High duty cycles. Torquing and tensioning is performed by our skilled shop and field teams according to documented procedures to ensure fast, accurate, and safe bolting application. TORQUE ASTM A490. When tensioning, one is able to tighten at least 50% of the stud population at the same time. Torque is simply a measurement of the twisting force required to spin the nut up along the threads of a bolt, whereas Tension is the stretch or elongation of a bolt that provides the clamping force of a joint. Procedures will be supplied including tensioning or torquing data sheets on specific classifications of Bolt tightening. However, they use different methods to accomplish this. Intensifier Modules: Truck Mounted Bolt Torquing Power Systems. 2. Class 900, NPS 12 and larger, service above 500F. (1.0) === Prerequisites for assembly of tools: (1.1) ==== Ensure that all the bolts have been assembled into the joint as per the above-mentioned procedure and the nuts fitted hand-tight. The ease. b. Torquing and tensioning is performed by our skilled shop and field teams according to documented procedures to ensure fast, accurate, and safe bolting application. Torquing is the most commonly used way to achieve fastener preload with bolted joints. When bolt tensioning, the bolt is preloaded and stretched during the process. Bolt Torquing & Tensioning. Always refer to the manufacturers recommended torque values if possible. T = KFD. to best suit your application. recommended torque values lubricated stud Ideal for use in wellhead service trucks and rig hydraulics. By attaching multiple tensioners, it is possible to tighten a number of bolts simultaneously for an even compression of the gasket. A307 Bolt Size TPI Proof T dry = (0.2) (337000 N) (30 mm) (10-3 m/mm) = 2022 (Nm) Lubricating the bolt with SAE 30 oil reduces the torque required to achieve the same tension with approximately 40%. When tensioning, one is able to tighten at least 50% of the stud population at the same time. Products range from manual torque multipliers, to a complete range of hydraulic torque wrenches and bolt tensioning tools. The stud's nut is wound down against the joint face Step 4.. Bolt Torquing Services. Very little turning force is required. BOLT TORQUE & TENSIONING. With this equation, if you know K, F and D, you can multiply them to get the torque needed to tighten the bolt so that it has the right amount of tension. Bolt Torqueing and Tensioning. Low voltage. They perform torquing and tensioning on bolts with a diameter of anywhere from 5/8 of an inch to 5 inches. ASTM A325 bolts are available in diameters from to 1-1/2 inch diameters (for diameters greater than types. Powerful solutions for the accurate fastening of critical fastening systems. 23 attachements . A torque of 800 Nm is equivalent to applying a force of 81kg over a 1000 mm long spanner. The nut can then be seated manually using a wrench. Class 1500, NPS 8 and larger c. Class 2500, NPS 4 and larger. Purpose The purpose of this procedure is to provide the methodology and testing of bolt tightening (bolt torqueing) of structural steel work in all supply mechanical equipment to the commercial buildings, plants and refinery project and its equipment structures. T = KFD. A wide range of capacities, styles, and accessories such as Whenever a bolt is tightened in a bolted joint, Torque is the required twisting force to move a nut along the threads of the bolt. Details of Flanges Tensioning vs Torquing About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features 2022 Procedure for Tensioning using 50% Pullers (ie: One puller on every other stud, and performing two steps to ensure proper tensioning). Rough handling. https://blog.enerpac.com torque-vs-tension-whats-the-difference All the torque wrenches are operated either by air or electric and the maximum working pressure is 10000Psi /690 Bar. A typical structural bolt, for example a M24 bolt will typically require a torque of approximately 800 Nm in order to fully tension the bolt. For low clearance job directly fit low profile tools are used. The result: A reliable, leak-free seal. Bolt Tightening Sequence to Follow. Both torque wrenches and bolt tensioners stretch bolts to generate spring tension. T = DFK. https://hardhatengineer.com/flange-bolt-torque-sequence-table Tension is the stretch or elongation of a bolt that provides the clamping force of a joint. Bolt torquing and bolt tensioning are both widely accepted ways to seal a joint. Each has different advantages and disadvantages and suits different types of application. A Torque wrench works by applying the principle of Newtons law. This comparison is based solely on the indisputable physics behind these methods and illustrated with the help of Roetschers diagram. Step-1: Tighten by torque wrench with 30% of required torque value. Apply. to best suit your application. Accuracy and other factors to consider when deciding whether to tension or torque a bolted joint. SUPREEM TUBERS offers hydraulic bolt torquing / tensioning services to serve most industrial requirements. The torque required to achieve this tension with a dry bolt with 0% lubrication can be calculated as. Extreme temperatures. ; Small A-factors up to 1,05 According to German bolting guideline VDI 2230 "the tightening factor A takes into account the scatter of the achievable assembly preload [forces] between FMmin and FMmax". HYTORC specializes in bolt tensioning and torquing and bolt tensioning methods. Wherever it is used, torquing achieves a high useful bolt load, at about 70 percent of the bolts yield strength. General Procedure Step 1.. It is not surprising then that torque, the most common method for creating tension in a bolt, is also the least accurate methodthe general consensus is that variation in bolt tension due to torque control is 25% to 35%. Tensioning The following bolted flanged connections shall be installed using bolt tensioners: a. We've also earned a reputation in the industry for consistently delivering on leak-free equipment startups. This tightening creates a drag on the bolt, increasing its stability and preventing it from loosening during use. Intensifier Modules for applications such as Torque Wrench bolting integrate into the existing truck or trailer low pressure system to provide a new capability. Tension is the quickest, most dependable way to attain an even bolt preload when several bolts have to be tightened on a flange. where T is the torque measurement, K is the nut factor , F is the tension and D is the bolt diameter. 18 stud bolt additional tightening procedure . Equipment Standard Wrenches & Hydraulic operated torque wrench is used for doing the job. A307 Bolt Size TPI Proof the pressure B on the bolts as described above in 100% tensioning from step 6-14. 21 quality assurance and controls . The formula to calculate torque and tension relationship in an assembly is. A bolt that is not correctly tensioned to a torque can have major consequences. Torque tightening. Always refer to the manufacturers recommended torque values if possible. Bolt Tensioning and Torquing Electric Hydraulic Bolt Tensioning Pumps Stratus: Designed for the punishing conditions and demanding requirements of Wind Turbine bolt tensioning. Our Bolt Torquing Rope Access maintenance team provides controlled loosening and tightening bolts by means of torquing and tensioning from small jobs to large turnarounds. Whether hydraulic torquing or hydraulic tensioning is the best choice must be decided on a joint-by-joint basis. Hydraulic tensioning: A jack is attached to the bolt, and high-pressure hydraulics is used to stretch the bolt and lift the nut clear of the flange. Bolt Torque Charts These charts show suggested maximum torque values for threaded products and are intended only as a guide. 17 temporary gaskit & their controls . Apply the Pressure A as described in the tensioning procedure from 8 to 14. This formula expresses the relationship between the load in a bolt and applied torque. Step-3: Tighten by torque wrench with 100% of required torque value. 4 bolt BOLT TIGHTENING PROCEDURE AND METHOD STATEMENT 1. ITH Bolting Technology is a developer, producer and distributor of hydraulic bolt tensioning tools and torque wrenches for tightening and loosening bolt connections from M 16 (3/8'') and up. Bolt Torquing & Tensioning. Tension can cut down on or even eliminate elastic interactions and over-compression of gaskets, and can also get rid of many of the obstacles torque faces when reaching desired preload. The nut torque stated in bolt tension tables is based on lubricating threads with light oil. Bolt Size TPI Tension (lbs) MIN Tension (lbs) MAX Tightening Torque Range (ft lbs) (Min-Max) Lubricated Tightening Torque Range (ft lbs) (Min-Max) Plain; 1/2" 13: 15,000: 18,000: 63 - 75: 125 - 150: 5/8" 11: 24,000: 29,000: 125 - 151: 250 - Torquing The other 30 percent is lost by torsional stresses. The Difference Between Torque & Tension Torque is the measurement of the force that causes something to rotate, for example, the turning force needed to spin a nut around the threads of a bolt. Bolt > tightening will follow a sequence with a diagonal pattern, indicated in the ASME PCC-1 table 3 & 3.1.. "/>. Step-2: Tighten by torque wrench with 60% of required torque value. Tension vs. Torque Anchor Bolt and Construction Fastener Manufacturer Contact UsLive Chat Open 6AM - 5PM PT M-F (800) 547-6758 sales@portlandbolt.com Live Chat MenuSkip to content Home Products Headed Bolts Hex Bolts Heavy Hex Bolts Structural Bolts Square Head Bolts Timber Bolts Headed Anchor Bolts Hex Lag Screw Enerpac offers a wide variety of controlled tightening options. Torquing, as implied above, can also be utilized. Use at your own risk!. Products range from manual torque multipliers, to a complete range of hydraulic torque wrenches and bolt tensioning tools. Hydraulic Bolt Tensioning using 100%, 50%, 33% and 25% tightening method. Tension control bolts are pre-assembled fasteners with a rounded head and a splined end that shears off when the nut achieves proper torque.
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