Forged steel Y type strainer, bolted bonnet, gasket adopt spiral wound(304+flexible graphite)or metalring seal. Construction is as follows Full port or conventional port; Bolted bonnet spiral wound gasket seal bonnet; Socket weld ends to ASME B16.11; Screwed ends (NPT) to ANSI/ASME B1.20.1; Equip blow down tap and renewable strainer. Application standards 1. Design and manufacture conform to BS5352 MSS SP-118; 2. Connection ends conform to: 1) Scoket welded ends conform to ANSI B16.11;JB/T1751 2) Screw ends conform to ANSI B1.20.1;JB/T7306 3) Butt-welded conform to ANSI B16.25;JB/T12224 4) Flanged ends conform to ANSI B16.5;JB79 3. Test and inspection conform to:API 598;GB/T13927;JB/T9092 4. Structure features：Bolted bonnet or welding bonnet 5. Materials conform to ANSI/ASTM. 6. Main materials： A105;LF2;F5;F11;F22;304(L);316(L);F347; F321;F51;Monel;20 Alloy.