thePetroStreet

Dear arcpro yes it seems 0.4 is the conservative value but remember for Cast Iron and Non-Ferrous materials B31.1 put y factor value as Zero (in the table notes). Similar is observed in B31.3. So range is from 0 to 0.7 though when you try to calculate the difference it becomes very less in terms of ...

As per B31.3, search from materials mentioned in specification index of Appendix A and if desired material is not ferritic or austenitic or cast iron than it must be in 'other ductile metals' category. Ductile is just a property of mostly all metals/alloys e.g. like A-395 is "Ductile and ferritic" i ...

Dear novice123,

To some extent the two points you mentioned are correct. Logically you must put a support near the heaviest of fittings or valves etc so that load can be instantly conveyed to ground or fixed structure if any. As far as hangers are concerned you need to select hanger type and spring ...

Yes ofcourse Irish as per B31.1 table 0.5 is required value at 950 C.

Regards,
Salz

A very simple but good question. As far as a must know is concerned following are the lists:

1- Experience in 2D/3D Piping drafting in variety of platforms or just one very popular platform.
2- Knowledge of ASME Codes (All and related) in terms of design, inspection and quality control. Fabrication ...

Nasir! nice elaborated response.

Just to add one thing more and that is for Threaded Connections of insertion type of instruments/controls etc above 495 deg C or above 103.4 bar pressure Seal weld as per B31.1 (114.2.3) becomes mandatory.

Regards,
Salz

Dear Octane...can you specify the Design temperature of the said calculation?
For stress ratio you might need to calculate the tm = PD/2(SE+py), and for S you need design temperature.
Than for t (0.147 in.) you will again calculate the S. Ratio of both of them will give you a Stress ratio which you ...

Thanks for valuable remarks Nasir. This discussion has been moved to Project Engineer - forum as this specific forum is related to Students of mechanical engineering not professionals.

If possible put your kind replies on that new topic at Project Engineer category so that everyone can benefit from ...

Just beautiful...well elaborated...love it

The criteria for span of supports is mentioned in ASME B31.1 and other piping codes..also you'll find it in any Piping Handbook. See the table 121.5 attached. This is just a basic guide for dry/water/insulated pipe lines but a more rigorous and accurate methodology is to use a stress analysis ...