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Step-1: Tighten by torque wrenc

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Step-1: Tighten by torque wrench with 30% of required torque value. hydratight torque wrench refinery This is important because it ensures consistent gasket compression and thus reduces the risk of damage before the joint is even pressurized.

We perform bolt torqueing, tensioning and bolt load verification using Ultra-Sonics to insure that bolted flange joint connections do not leak. The D represents the bolts diameter, the F is the axial bolt force, and the K represents k-factor or nut factor which is a variable based on the use or absence of lubrication. Ohmstede Industrial Services (OIS) bolts up over 32,000 flange joint assemblies annually. It eliminates the need for torque and for forceful, manual tightening. Hydraulic tensioning doesnt achieve the same yield strength as torquing. While the bolt is stretched to 90 percent of its yield strength, the bolt springs back after the hydraulic pressure is relieved. This causes additional stress to the assembly. Our tools are ideal for industrial, workshop environments, or field service crews. Hydraulic Bolt Tensioning using 100%, 50%, 33% and 25% tightening method. 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. https://hardhatengineer.com/flange-bolt-torque-sequence-table 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%. This is accomplished using a pulling or pushing force which is created by a hydraulic cylinder. https://paktechpoint.com bolt-torquing-and-tensioning-method-statement For low clearance job directly fit low profile tools are used.

All the torque wrenches are operated either by air or electric and the maximum working pressure is 10000Psi /690 Bar. Hydraulic bolt tensioners more commonly used for bolting applications in Europe than the United States. Hydraulic bolt tensioning is a quicker, easier, and safer way to tighten large bolts to their optimal specified tension. SUPREEM TUBERS offers hydraulic bolt torquing / tensioning services to serve most industrial requirements.

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Tension control bolts are pre-assembled fasteners with a rounded head and a splined end that shears off when the nut achieves proper torque. HYTORC specializes in bolt tensioning and torquing and bolt tensioning methods. When the nut and bolt are tightened, the thread converts the applied torque into tension, which is converted into a clamping force. torqueing The stud's nut is wound down against the joint face Step 4.. What is the difference between bolt torquing and bolt tensioning? They perform torquing and tensioning on bolts with a diameter of anywhere from 5/8 of an inch to 5 inches. CDI Torque Products is not responsible for any application of torque or it's consequences as a result of using this chart. T = KFD. Procedures will be supplied including tensioning or torquing data sheets on specific classifications of Mechanical tensioning with Superbolt multi-jackbolt tensioners. The other 30 percent is lost by torsional stresses. Class 900, NPS 12 and larger, service above 500F. This comparison is based solely on the indisputable physics behind these methods and illustrated with the help of Roetschers diagram.

where T is the torque measurement, K is the nut factor , F is the tension and D is the bolt diameter.

Bolt tightening. If at this bolt load the leak has not sealed then this will be reported to the client to approve further bolt tensioning or allow inspection, gasketrenewal or reworking. Bolt Torque Charts These charts show suggested maximum torque values for threaded products and are intended only as a guide. TORQUE ASTM A490. When another lubricant is used the torque values must be adjusted to get the 65% to 75% yield stress recommended for bolted connections. This is a great advantage to using TC bolts as they provide a quick installation procedure that maintains accuracy. Apply. bolt torque tightening procedures . In some cases it's even possible to tighten 100% simultaneoulsy.

Torque wrench use generally depends on the size of the bolt, while tensioners can Hydraulic pressure is applied to the tensioner which then stretches the stud Step 3.. 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 - Step-3: Tighten by torque wrench with 100% of required torque value.

Download PDF. Torquing, as implied above, can also be utilized. The objective of tensioning is to stretch the bolt, or stud, to a predetermined load, by using force to elongate the shank. CDI Torque Products is not responsible for any application of torque or it's consequences as a result of using this chart. Equipment Standard Wrenches & Hydraulic operated torque wrench is used for doing the job. Bolt Torquing And Tensioning At Rtork CONTROLS we provide a total solution for all of your bolting requirements utilising the latest technology to drive the highest standard of service. 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. Dust and dirt.

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 Bolt Torquing & Tensioning. However, they use different methods to accomplish this. Torque tightening. Tensioning The following bolted flanged connections shall be installed using bolt tensioners: a.

Procedure for Tensioning using 50% Pullers (ie: One puller on every other stud, and performing two steps to ensure proper tensioning). The controlled application of torque on a flange joint connection ensures even distribution and uniform displacement of pressure. BOLT TORQUE/TENSIONING. Bolt torquing exerts a rotational force on the fastener, while bolt tensioning involves stretching a fastener with what looks like a hydraulic load cell. Which is the best method? Well, a torque wrench sales guy would tell you torquing is the way to go. A tensioner sales or service guy would tell you tensioning is the best way to do things. to best suit your application. The ease. Bolt Torquing & Tensioning. 21 quality assurance and controls .

Ideal for use in wellhead service trucks and rig hydraulics. T = DFK. ; 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". 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. The reduced torque can be calculated BOLT TORQUE & TENSIONING. 23 torque tighting do or do not . Bolt tensioning is carried out using a hydraulic stud bolt tensioner.

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. Apply the Pressure A as described in the tensioning procedure from 8 to 14. 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. Torquing and tensioning is performed by our skilled shop and field teams according to documented procedures to ensure fast, accurate, and safe bolting application. The torque value used for a specific nut/bolt assembly is always a matter of concern. However, torque tightening is less precise than other methods of bolt tensioning. You can use a hydraulic bolting tool to stretch the bolt, instead of turning it. The tool provides a high degree of accuracy, which is necessary in many applications. T = (KDF)/12

The torque value used for a specific nut/bolt assembly is always a matter of concern. Making the shift from torquing to tensioning might necessitate changing applicable hardware to ensure the tensioner has adequate room to grip the stud, which requires consideration when ordering hardware prior to the switch.

4. Torquing and tensioning is performed by our skilled shop and field teams according to documented procedures to ensure fast, accurate, and safe bolting application. Always refer to the manufacturers recommended torque values if possible. This tightening creates a drag on the bolt, increasing its stability and preventing it from loosening during use.

Ideal for critical service, high pressure, and challenging sealing applications. (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. (1.2) ===== Hydraulic bolt tensioning is a semi-automated process, substantially more accurate than bolt torqueing and delivering a precise residual bolt load. What is the difference between bolt torquing and bolt tensioning?

The formula to calculate torque and tension relationship in an assembly is. A307 Bolt Size TPI Proof When bolt tensioning, the bolt is preloaded and stretched during the process.

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. Bolt Tightening Sequence to Follow. When tensioning a bolt to a specific torque, it is important to be aware of the factors that must be in place to avoid undertightening or overtightening the bolt. is an accurate method of tightening threaded fasteners and subsequently inducing load through advanced hydraulic technology - all without directly turning the nut thereby avoiding frictional losses. 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 Torquing, as implied above, can also be utilized. Use at your own risk!. Remove the tensioners from the bolts A and Insert the tensioners on B bolts as above. Class 1500, NPS 8 and larger c. Class 2500, NPS 4 and larger. Bolt torque and bolt tensioning are both legitimate ways to seal a joint.

The Equation to find Tension to Torque. Ideal for critical service, high pressure, and challenging sealing applications. 19 torque / tensioning valve .

With our state of the art hydraulic accessories, Nut and washer, Reaction Washer and

The ease. Torquing is the most commonly used way to achieve fastener preload with bolted joints. 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. recommended torque values lubricated stud The bolt tensioner is fitted over the stud Step 2.. High duty cycles. BOLT TENSIONING & TORQUING, LEAK TESTING , N2 & He. Bolt tightening. 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.

Website: https://www.hextechnology.com/articles/bolt-tensioning-vs-torquing/ Enerpac offers a wide variety of controlled tightening options. 4 bolt When tensioning, one is able to tighten at least 50% of the stud population at the same time. 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. These metric bolt torque charts show the ideal tightening torque for class 8.8, 10.9, and 12.9 bolts for both wet and dry tightening.

By attaching multiple tensioners, it is possible to tighten a number of bolts simultaneously for an even compression of the gasket. Bolt tensioning enables a hydraulic load, more commonly known as the applied load, to act upon the stud bolt. 5 Non acceptable method of tensioning bolts The reason the part turn method is not acceptable is outlined below. b.

General Procedure Step 1.. Controlled Bolting Tools Enerpacs bolting solutions cater to the complete bolting workflow, ensuring joint integrity in a variety of applications throughout the industry. The result: A reliable, leak-free seal. T = KFD. The nut factor , K, sums up the combined effects of many variables affecting. the pressure B on the bolts as described above in 100% tensioning from step 6-14. When purchasing tools such as hydraulic wrenches and hydraulic bolt tensioners, you need to provide some information about bolts, such as bolt pretightening, bolt tension, torque value, etc., to help manufacturers recommend suitable hydraulic tools to us.In addition, pressure, temperature, vibration or some external force will cause the bolts to loosen, so for the safety Bolt torquing and tensioning procedure pdf PFL Engineering provides bulling solutions and requirements, including torque, tensioning and stress analysis with the use of cutting-edge equipment that include hydraulic torque keys, bolt tensioning cylinders, hydraulic nuts and more. This is a higher yield strength than hydraulic tensioning normally achieves but lower than mechanical tensioning. For critical and applications involving higher accuracy, most customers prefer 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. T = (KDF)/12 Tension is the quickest, most dependable way to attain an even bolt preload when several bolts have to be tightened on a flange. Torque is the ability to apply a rotational force and is used to tighten and loosen bolts, while bolt tensioning is when the bolt's nut is tightened against the head of the bolt. 20 flange traceability identification tagging . Torque is just a measure of the torsional force required for the nut to rotate upward along the bolt thread, while tension is the tension or elongation of the bolt that provides the clamping force of the connection. This is especially important for pressure containing vessels requiring even gasket compression to affect a seal.

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Step-1: Tighten by torque wrenc