thePetroStreet

You can get some information on the following link regarding use of gas mixtures on welding

http://www.praxair.com/praxair.nsf/0/3a ... P-8201.pdf

Good inputs Sim. One thing I like to add here.

In the market situation like the one today in the world and specially in Pakistan, be flexible in your business. Dont built your facility which is only good for one work. Make it flexible as far as you can. Dont enter into a business where you commit ...

What is your composition of purge gas, Ar99.99% or Ar+2%N?
In one of our project we have the same problem and is resolved by changing the composition of purge gas from A99.99% to Ar+2%N. For Inconel welding it is preferred to use mixture of gases rather then pure Ar as purge gas.

Best available softwares for flexibility analysis is CAESAR II and Autopipe. I recommend CAESAR II version 5.2 as it also incorporates flange joint analysis which in previous versions was not available. With respect to ease of use Autopipe has no match and it is also used for vibration analysis of ...

- No need for impact testing on the nozzle and associated piping at -18F as rate MDMT is -155F for A-53 gr B nozzle as per your defined thickness.
- For shell; thickness will be required for calculation of rated MDMT.

Sorry, for late reply. Go to www.mitcalc.com. They have software related to all kinds of gears and belts. They give you a free testing period for 30 days in which you can fully use the software.

Hi Pervez,

1. Specification of grout is based on following parameters:
- Vibration produced by machine.
- Weight.
-Critical machine or non-critical with respect to operation.

If you have a reciprocating pump or high speed centrifugal pump with high unbalanced forces (causing high vibrations) then ...

Hi tosif,

Actually, there are different freewares (actully student versions) available for transmission system analysis but all of them only evaluated power distrbution, ratios, speed etc from gears. If you want to evaluate the whole transmission including loads on driver and driven shaft, bearing ...

Requirement of Impact test is evaluated from UCS 66 of ASME Sec VIII div 1.

1. MDMT is usually defined by the client. In some cases it is not required if you evaluate the impact test requirement temperatures yourself and there is no need for impact test. Otherwise if you are not clear about the ...