Surface Preparation - Condition Elcometer 999 Weld Comparator The Elcometer Surface Weld Comparator provides for the first time, a means of comparing the quality of welds. Made from durable T Grade ABS plastic, the comparator comprises of 14 different examples of actual welds, allowing a thorough evaluation to be completed. Each Weld Gauge is supplied complete with a copy of the NACE SP0178-2007 Standard, providing detailed recommendations on design, fabrication and surface finish requirements. It includes generic and graphic descriptions of various degrees of surface finishing of welds that may be specified in preparation for the lining of tanks and vessels. Technical Specification Part Number Elcometer Surface Weld Comparator © 2015 Elcometer Limited. Elcometer is a registered trademark of Elcometer Limited. All other trademarks acknowledged. Due to our policy of continuous improvement, Elcometer Limited reserves the right to change specifications without notice.