The National Board of Boiler and Pressure Vessels requires a Certificate of Authorization and R-Stamp for the repair or alteration of boilers, pressure vessels and other pressure retaining equipment. Any repairs to the ASME pressure zones on tanks require a R Stamp welding. Any repairs not in that designated area will not require an R Stamp welding. Apache's Field Service Technicians are fully certified ASME welders. For over 40 years, Apache continues to maintain rounds of audits and inspections from ASME compliance and safety professionals that speak to the consistency of the welders and the effectiveness of the quality control department. Our Field Service team are R-Stamp certified. Apache will also provide all compliance addendum documentation required for ASME repairs of modifications in the field. A host of modifications are available to ASME and non-ASME tanks and vessels. We offer a feasibility audit to compare field modifications to the cost of a new system. Call Joe Hertel, Field Services Manager, at 920-356-7334 to discuss your application.