The features of flange 1)Types: plate flanges, blind flanges, slip-on handles, welded necks, welded sockets, and threads 2) Standard: ASME, ANSI, AWWA, API, JIS, DIN, UNI, BS, AS 3) Size: 1/2" - 160" 4) Pressure class: 150lbs - 2,500lbs 5) Special design available Our company has the powerful technical support system and complete quality control and quality guarantee system. Our company took the lead to pass the German TUV - ISO9001: 2000 quality system certification and international ISO9002 quality system certification; and in 2002, our company obtained the German Rhine PED/CE certification.