article explores how bolt torque should be calculated and applied to seal a flanged connection. Bolt torque Torque is the turning force measured in Newton metre (Nm) applied to tighten (turn) the nut on a bolt. In a bolted flange, the applied torque generates the axial load in the bolt. The bolt acts like a spring. Tightening the nut stretches the

Pass 1A – Tighten the first four stud bolts to between 20% and 30% of your target ft-lbs. Pass 1B – Tighten the next four bolts, placing each to the right of the already tightened bolts, to between 50% and 70% of the target ft …

Bolt Torque Values for ASME B16.47 Series A Class 150# Flat Flangeswith A193 Grade B7 Bolts. NOTE 1: This torque table applies for 1/16" and 1/8" thick homogenous elastomeric gaskets. The pressure rating of the material may vary depending on the grade. NOTE 2: The above-mentioned torque values are based on the maximum bolt stress of 60,000 psi.

When tightening a four-bolt flange, use a criss-cross pattern. Preparation flange bolt-up. In a flanged connection, all components must be correct to achieve a seal. The most common cause of leaky gasketed joints is improper installation procedures. Before beginning a bolting process, the following preliminary steps will avoid future problems..

Bolt Tightening Procedure. Written by Matt Milbury on 10 January 2016. Posted in Pipe Flange. Start the tightening procedure by lubricating the nuts and bolts . Then hand tighten till they are snug against the flanges . If an …

6000 PSI Series (Code 62) Flange recommended screw torque Hydraulic Flange recommended screw torque Socket screw Socket Tightening bolt circle head cap torques (LK) screws Nm1) LK30 M6 10 LK35 M6 10 LK40 M6 10 LK51 M10 49 LK55 M8 25 LK56 M10 49 LK62 M10 49 LK72.5 M12 85 1) Tolerances: max.10%

Maximum tightening torque for coarce threaded metric steel bolts: Fasteners - Bolts, nuts and threaded rods - torque, tension and loads. Bolt Torque Calculator - Calculate required bolt torque. Improvised Torque Wrench - Improvise a torque wrench with a luggage scale. ISO 724 - Metric Threads - Dimensions of metric threads according ISO 724.

These guidelines are intended for bolting of PVC flange adapters. Tighten bolts by hand until they are snug. Establish a uniform pressure over the flange face by tightening the bolds in 5ft/lbs increments to the torque valves listed in the table below using a 180-degree opposing. Care must be taken to avoid "bending" the flange when joining ...

Use of 50 ksi bolt stress pre-load could overstress small size Class 150 (up to 1") and 300 (up to 3") weld neck flanges, damage gaskets in small sizes (over 20 ksi gasket stress) Pre-loads of 60 ksi are recommended for some Class 150 flanges (3" and 8") The torque tables consider all elements of the flanged assembly (gasket, bolt, flange)

torque valve Table-SAEP-351-02.The first stage should be more than 30% of the final torque. The final torque shall be within + 5% of the required torque values. Apply the torque evenly to each stud bolt tightening sequence. The final torque must be within +. 5% of the required values per stud bolt tightening procedure.

Below is a list of the recommended tightening torques for 12.9 / 10.9 / 8.8 zinc plated finish bolts. Maximum Recommended Tightening Torques. Metric Course Pitch. Grade 12.9 Plated. Metric Course Pitch. Grade 10.9 Plated. Metric Course Pitch. Grade 8.8 Plated. Nm.

For easy handling, bolt numbering shall be done clockwise around the flange with the following sequence. The table below shows the torque sequence for flanges with 4 to 32 bolts. Number of Bolt / Stud. Bolt Tightening …

guidelines only and are based on ideal conditions, perfect flanges, flange alignment & new well lubricated bolts/nuts according to the national boiler code, installed in accordance with the APS Flange Sequence Procedure. Torque values are based on using weld-neck flanges and lubricated stud bolts with a 0.15 friction factor. Rev 071218

All stud bolts which are 7/8″ and more can be tightened by using a torque wrench. The tightening has to be taken out in three/ four steps in levels of 30, 50, and 70 percent of the value of final torque. A fourth stage generally uses 70 percent of the entire torque value. For heat exchangers flanges, the torque values have to be 30, 70, 100 ...

7016 (Mechanical) (OP) 2 Mar 22 08:25. Hi All, I want to tighten the bolts connection between pipe flange and butterfly valve flange. Details as follows: Valve size : DN2200. BOLTS: M56 X 52 Nos. - A2 hexagonal bolts. 8mm thick rubber gasket is used in …

Clean the studs and lubricate them properly, with a mixture of oil and graphite for example. Place these studs in the holes. Approach the nuts by hand. Follow the adjustment sequence according to the figures. Do not exceed 30% of the recommended torque values for the studs, as it may cause a bad seating of the joint.

Torque is the turning force measured in foot-pounds (ft-lb) or inch-pounds (in-lb) applied to tighten (turn) the nut on a bolt. Torque can be measured during flange assembly with a properly calibrated torque wrench. In a bolted flange, the applied torque generates the axial load in the bolt. The bolt acts like a spring.

Bolt tightening. 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. Bolt tightening will follow a sequence with a diagonal pattern, indicated in the ASME PCC-1 table 3 & 3.1.

347. NOTE 1: This torque table applies for 1/16" and 1/8" thick homogenous elastomeric gaskets. The pressure rating of the material may vary depending on the grade. NOTE 2: The above-mentioned torque values are based on the maximum bolt stress of 60,000 psi. Bolt yield should be at least 80,000 psi. NOTE 3: This table does not take flange ...

FLANGE BOLT TORQUE CHART ASTM A193 (B7, B16, B8) The flange bolt torque chart shows the recommended torque to be applied to flange bolts in ft x lbs or NM, depending on the stud bolt grade and diameter. The torque values are shown in three steps (30%, 70%, and ) and are only indicative, as the conditions of the specific application should ...

Bolt Torque is the twisting or turning force applied to tighten the nut on a bolt. Using a calibrated torque wrench (Manual or Hydraulic Torque Wrench), …

The lower the bolt scatter, the more consistent the flange assembly.) With tensioning, you're typically going to see +/- 10% accuracy. That means your bolt scatter will be lower. If the target was 50 KSI, you'd see values between 45-55 KSI. However, there are some important caveats to note here.

Keep repeating until every bolt has been tightened. TIGHTENING SEQUENCE. Following the pattern described above, insert the bolts and run up the nuts by hand. Set the torque wrench to 30% of full torque and, using the …

Flange Bolt Torque Sequence and Torque Table - A Complete ... RTJ flanges dimensions are covered in ASME B16.5 – which covers Pipe Flanges and Flanged Fittings for size NPS ½" to 24" for above NPS 26" to 60" it should be as per ASME

R1 81 01 01 Flange assembly procedure and torque tables Author: L. van der Meulen / D. Jonker / M. Picavet ... R1 81 01 01 Flange assembly procedure and torque tables Version: 2.0 4 TIGHTENING OF THE ... • Install the bolts in such a manner that all bolt heads are on one side of the flange; • In case of screw joints where the screw head is ...

Flange Bolt Torques The following charts indicate the approximate bolt torque required to seal flanged joints against internal pressure. The torques given are based on using a 3mm thick 70 IRHD rubber gasket. The torque values are applicable for the type of gasket specified and bolts, nuts and washers should be free from damage, rust etc.

Bolting torque to develop 50% Bolt Yield Stress at Nut Factor, K=0.16. This Table is applicable to Never-Seize paste and Fel-Pro lubricant, K=0.16. The above Table is applicable only for ASTM A320 Grade L7, A193 Grade B7 and A193 Grade B16 Stud Bolts. The torque values are approved for spiral wound graphite and PTFE filled gaskets, graphite ...

Flange joints require proper tightening to avoid leakage. Bolt tightening sequence, or torque sequence, is defined in the torque tightening procedure. Flange joints are torqued tight with the help of a torque wrench (manual or hydraulic). The clamp load produced during tightening is higher than 75% of the fastener's proof load.

Taking the 8-32 screw as an example, the stress area is 0.014 in2 and our maximum force is F = (0.014 in2) (31,500 psi) = 441 lbs and from the formula above our maximum torque is T = (0.2) (0.164 in) (441 lbs) = 14.4 in-lbs. This …

BOLT TIGHTENING SEQUENCE FOR FLANGES USING 8 BOLTS.. Lubricate bolt and nut threads and nut bearing face (where it contacts the flange). After flange assembly and all nuts have been run down by hand, start wrench tightening following the sequence of the numbers indicated (marking the number on the flange with a crayon aids in keeping track of the …

Flanges in PVC and CPVC Flange size (in) ANSI/ASME B16.5 Recommended bolt torque. (ft/lb) ½ 10-15 ¾ 10-15 1 10-15 1-1/4 10-15 1-1/2 10-15 2 20-30 2-1/2 20-30 3 20-30 4 20-30 33-50 8 33-50 10 33-50 12 33-50 The recommanded bolt torque in this table is for flange-to-flange connection. The bolt tightening sequence is common to all flange ...

CHRISTIES SOLVE YOUR PROBLEMS AND OFFER TORQUE SOLUTIONS CLASS FLANGES BOLT TORQUE LOADS No statement or data herein is warranted or guaranteed to be accurate CLASS 900 – FLANGE INFORMATION Bolt CLASS 1500 – FLANGE INFORMATION CLASS 2500 – FLANGE INFORMATION Nom. Flg. Size Ins. (mm) Bolting No. x Dia. ins A/F Ins. …

SAE bolt grades indicate the strength of the bolt. Each bolt grade has an ideal tightening torque for maximum clamping force without breaking. Grade 2 bolts are cheap but not very strong, grade 8 bolts are the strongest and most expensive, and grade 5 bolts are the most common. Refer to the charts to find the ideal tightening torque.

While tightening the bolt with torque wrenches (for pipe / Manway flanges) ensure that tightening load to each bolt is applied as uniformly as possible. The tightening shall be carried out in three or four stages in steps of 30, 50 & 70 percent of the final torque value. A fourth stage again uses 70 percent of the final torque value.