Re: [MW:29202] What is Deference Between LP & HP welder?

Dear Atif,

HP Means, High-Pressure pipes and pipe materials alloy or low alloy steel

LP means, Low-Pressure pipes materials carbon steel. So you have to know pipe materials and according to materials you need to qualify welders.

Regards,

Eyup Tan

On Wed, Mar 6, 2019 at 10:15 AM Atif <atif.aslam@bishoinfra.com> wrote:

Dear All,

Our client is asking for make categories for our welder such as HP & LP,  in Combined cycle power plant project, anybody can help me that why we need to do this and what is the welder qualification testing procedure/system for HP & LP welder? 

Regards:

Atif.

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