Ring joint gaskets (metallic gaskets) are widely used in ... wellhead assembly. BETTER can supply a full size of ring joint gaskets, flexible graphite gasketa, spiral wound gaskets and ... ) Standard: ASME B16.20 HG20612 HG20633 Material: Carbon steel, soft iron, inconel600, M-400, C-276, 10#, ... stainless steel 316, ss321, ss304,ss304L. Temperature: -100℃~800℃, Please ...