In this case, you need to make sure that the company that is performing the welding on the long seams is aware that the vessel requires production impact testing. They will be responsible for performing the production impact testing for the long seams that they are welding. They will need to supply you with all of the applicable testing reports. Once you are ready to start welding the girth seams, you will also need to run a production impact test with the WPS you are using for production welding.