Can you give me information about Welding and Welder Test Range?

rapture,

The information you request is very detailed, too much so to attempt to do it in a post. You need to review ASME Section IX and then post specific questions.

ok where do I have chance to download ASME section IX?

These are the current licensees for electronic versions of BPVC:

ANSI - The American National Standards Institute, Inc
Webstore: http://webstore.ansi.org/ansidocstore/default.asp

BSI Business Information
Worldwide Standards Direct
Web address: http://www.bsi-global.com/en/Standards-and-Publications/Business-Information/Worldwide-Standards-Direct/

IHS, Inc.
Website: http://www.ihs.com

SAI Global - ILI Publishing
Website: http://www.ili.co.uk

Thomson Scientific / Techstreet
Website: http://www.techstreet.com

rapture,
Depends on your PQR.What kind of material thickness and weld joint design.kindly refer to ASME Section IX,QW-452 for the Performance Qualification Thickness Limits and Test Specimen (thickness range).