Size Pressure Connect Type Material Standard 1-1/4″~56″ DN32~DN1400 CL150 PN6～PN25 BW ASME B16.34 ASME B16.34 1-1/4″~48″ DN32~DN1200 CL300 PN40 – C95800 DIN 3804 1-1/4″~48″ DN32~DN1200 CL400～CL600 PN63～PN100 – C63200 API 6D 1-1/4″~36″ DN32~DN900 CL900~CL1500 PN160~PN250 – titanium alloy and other special materials GB/T 12236 1-1/4″~24″ DN32~DN600 CL2500 PN320 PN400 –  –