installation guide - james walker
TRANSCRIPT
Installation guide
SAFETYThroughout all bolt assembly and tightening processes it is essential to follow standard safety procedures and instructions on any equipment. The relevant personal protection equipment should be worn at all times.
Best bolting practice• Each RotaBolt® stud or bolt is load test calibrated during manufacture to achieve the desired
tension for the application in which it is to be used.
• However, it is still necessary to estimate the tightening force (torque) that needs to be used, so that the tightening tool selected has sufficient torque power capacity and for any pre-set requirement.
• All variants of RotaBolt should be installed following best engineering practice or methodology prescribed by the site operator to the point at which final tightening is reached.
• Continuing to follow the same tightening pattern, the fasteners should now be tightened until the RotaBolt indicator shows that the correct design tension has been reached.
• Torque values are disregarded at this point as the RotaBolt indicator is the ‘control’ for confirmation of the achievement of the design tension setting.
• At the correct level of tension, the fastener has ‘stretched’ the calibrated amount and the RotaBolt indicator cap or wireless app dashboard will indicate that the fastener has been installed to within -/+5% of the design tension for the application.
The method of checking the different types of RotaBolt indicator are detailed on the following pages.
International standardsAlthough requirements may vary between applications, James Walker engineers will use one of the following international bolting standards as best practice when installing RotaBolt products.
• ASME PCC-1: Guideline for pressure boundary bolted flange joint assembly.
• BS EN 1591-4: Competency in the assembly of the bolted connections of critical service pressurized systems.
BOLTING PRINCIPLES
Achieving and maintaining the correct clamping force, or bolt tension, is essential in assuring bolted joint integrity. 85% - 90% of all bolted joint failures are caused by inaccurate bolt tension at installation.
Installation guide
SAFETYThroughout all bolt assembly and tightening processes it is essential to follow standard safety procedures and instructions on any equipment. The relevant personal protection equipment should be worn at all times.
Tension checking
RotaBolt® RB1 TouchEach RotaBolt RB1 Touch is calibrated to ‘lock’ the RotaCap at the desired preload tension value on installation with an accuracy of ±5%. The cap will turn freely between finger and thumb until ‘locking’ when the target tension is achieved.
RotaBolt® RB2 TouchThe dual load indicator has an outer cap for high tension setting and an inner cap for low tension, giving the choice of an operational tension range, either for overload or maintenance control. Both work in the standard RotaBolt fashion, rotating freely between finger and thumb until ‘locking’ when the target tension is achieved.
RotaBolt® VisionRotaBolt Vision uses a specially developed indicator which appears as an unbroken yellow line across the head of the fastener when the target tension is achieved.
Should tension be lost, the indicator instantly rotates by ninety degrees creating a distinct right angle break in the yellow line that is easily identifiable even from distance.
BOLTING PRINCIPLES
The RotaCap on top of each RotaBolt stud will indicate when the correct desired tension is achieved during the tightening process.
However, it is still necessary to estimate the tightening force (torque) that needs to be used, so that the tightening tool selected has sufficient torque power capacity and for any pre-set requirement.
SAFETYThroughout all bolt assembly and tightening processes it is essential to follow standard safety procedures and instructions on any equipment. The relevant personal protection equipment should be worn at all times.
BOLTING PRINCIPLES
The RotaCap on top of each RotaBolt stud will indicate when the correct desired tension is achieved during the tightening process.
However, it is still necessary to estimate the tightening force (torque) that needs to be used, so that the tightening tool selected has sufficient torque power capacity and for any pre-set requirement.
Installation guide
SAFETYThroughout all bolt assembly and tightening processes it is essential to follow standard safety procedures and instructions on any equipment. The relevant personal protection equipment should be worn at all times.
Tension checking
RotaBolt® Connect• Open the App on the mobile device and login.
• Activate the relevant Connect fastener by placing the magnetic activator close the cap of the fastener and then select the active bolt on the app.
• Press ‘Install’ to open the installation screen.
• You will now see a load reading or percentage of target load traffic light display (you can toggle between these), which will change as you tighten the fastener.
• The display will show orange whilst tightening until the target load is achieved, when it will change to green indicating that target load ±0.5% of full scale has been reached.
• If the display displays red, this indicates that the bolt has been over-tightened and target load has been exceeded.
• Once the target load has been achieved press OK to complete the install and set the bolt to collect and transmit data at the predetermined levels.
LOAD TEST CALIBRATED
Each RotaBolt stud or bolt is load test calibrated during manufacture to achieve the desired tension for the application in which it is to be used.
James Walker Sealing Products & Services Ltd
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Information given in this publication is given in good faith and represents the results of specific individual tests carried out by James Walker or third parties in accordance with the methodologies described in this publication, performed in a laboratory. No representation or warranty is given in relation to such information. Values and/or operating limits given in this publication are not an indication that these values and/or operating limits can be applied simultaneously. While such results may comprise useful additional information and are industry standard tests, they are no substitute for conducting (or procuring from James Walker) your own tests and engineering analysis and satisfying yourself as to the suitability of the product you select. Please also note that a product tested in accordance with the published methodology may not perform to such values in application and/or under different test conditions or methodologies for a variety of reasons, including but not limited to the environment in which it is used/tested or which passes through it or otherwise affects the product, or due to the handling, storage or installation, or due to the effect of housing or other parts. Our personnel will be happy to discuss any historical examples we have of a product having been previously used in a particular application.
To ensure you are working with the very latest product specifications, please consult the relevant section of the James Walker website: www.jameswalker.biz.
Issue number 1 JW4773 0621/PDF© James Walker 2021