I just want to know the criteria for wind load for pipeline under ASME B31.4...

Beacause it is indicated in the ASME B31.4 : "401.2.3.2 Wind Loads. Wind loads shall be considered in the design of above grade pipelines. Refer to ASCE 7 for the application of wind loads."

Does it mean all pipe size be subjected for wind load?
What criteria should I consider as per pipe size? Thank you in advance for the reply.

Sincerely,
marchie

General practice is that if the pipe is not inside a permanent structure, it is subject to wind loading.

CAESAR can calculate this wind loading automatically, provided you feed it a wind shape factor and a design wind velocity.

End-user specifications may have additional requirements.