The old version 151 was used for heat exchanger design; now the new 151 standard is in effect. Is it necessary to modify the drawings?
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The old version 151 was used for heat exchanger design; now the new 151 standard is in effect. Is it necessary to modify the drawings?
To determine whether it meets the requirements of the new standard, the standard number in use must be changed to the new one.
Those that have already been designed cannot be changed, but new designs must be created in accordance with the new standards
Based on your design completion date, if it is after the implementation of the new standards, it will need to meet the requirements of those new standards...
It depends on when you produce the drawings. If they were created before the implementation of the new standards, then no modifications are needed since they were designed according to the old standards; however, if they were created after the new standards came into effect, then they need to be designed in accordance with those new standards.
It should be determined based on the contract signing date; if the contract was signed before the implementation of the new standards, the old standard design can be used, otherwise the new standards must be applied
According to the agreement at that time, it depends on your project regulations.
If the drawings need to be updated, replace the standards accordingly; if the equipment does not violate the new standards, then no changes are necessary to the drawings
Thank you all for your enthusiastic replies! :handshake
The drawings used for heat exchangers produced after the standard implementation date should be in accordance with the new standards; at the very least, the standard numbers need to be updated, and if they do not meet the new standards, modifications must be made to bring them into compliance.
The design standards are determined based on the contract signing date