Overview Reviews Product Description These 150 lb flanges meet ASME B16.5 thread dimensions. They feature female pipe (NPT) threads for easy attachment but can be welded to the pipe for critical and leak-proof sealing. Welding is preferred, especially in larger sizes. Greenline Industrial Fitting Catalog New Greenline Industrial Fitting Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Greenline 3" 150 LB Stainless Steel Raised Face Threaded Flange G0819SSRF-300 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *