What grade of duplex is to be welded?
What welding process is to be used?
Are there any additional owner/engineer procedure qualification requirements, such as impact testing, corrosion testing, ferrite measurements, etc.?
Unless you have a welding background and/or experience with weld procedures, I would suggest you hire the services of a Certified Weld Inspector or Weld Engineer to help you develop these procedures. It will be well worth the cost.
i got a CSWIP 3.1 and i also got a WPS in Carbon Steel and SS but i facing a difficulty in make a preparation for WPS in Duplex..because i used to work onshore but this times i need to do a work at offshore..that why i need to get somebody to guide me..thanks
bzn;
What type of specific guidance do you need? If you are familiar with WPS in carbon steel and stainless steel, follow the same format for the duplex stainless steel in terms of identifying your essential welding variables and filler metal. The reference posted by SJones should provide the necessary information.