螺纹法兰是指采用螺纹与管道连接的一种法兰。设计时,可按松式法兰处理。优点是不需要焊接,法兰变形时对筒体或管道产生的附加力矩很小。缺点是法兰厚度大,造价较高。适用于高压管道的连接。
螺纹法兰是将法兰的内孔加工成管螺纹,并和带螺纹的管子配套实现连接,是一种非焊接法兰。它和平焊法兰或对焊法兰相比,螺纹法兰具有安装、维修方便的特点,可在一些现场不允许焊接的管线上使用。合金钢法兰有足够的强度,但不易焊接,或焊接性能不好,亦可选择螺纹法兰。但在管道温度变化急剧或温度**260℃低于-45℃的条件下,建议不使用螺纹法兰,以免发生泄漏。
ASME SB366/ASTM B366 | Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings | ||||
Material Grade | UNS N02200 /WPN/CRN | UNS N02201 /WPNL/CRNL | UNS N04400 /WPNC/CRNC | UNS N06002 /WPHX/CR HX | UNS N06007 /WPHG/CR HG |
UNS N06022 /WPHC22/CR HC22 | UNS N06025 /WPV602/CRV602 | UNS N06030 /WPHG30/CR HG30 | UNS N06045 /WPV45TM/CRV45TM | UNS N06059 /WP5923/CR5923 | |
UNS N06200 /WHC2000/CR HC2000 | UNS N06230 /WPH230/CRH230 | UNS N06455 /WPHC4/CR HC 4 | UNS N06600 /WPNCI/CRNCI | UNS N06603 /WP603GT/CR603GT | |
UNS N06625 /WPNCMC/CRNCMC | UNS N06985 /WPHG3/CR HG3 | UNS N08020 /WP20CB/CR20CB | UNS N08904 /WP904L/CR904L | UNS N08031 /WP3127/CR3127 | |
UNS N08120 /WPH120/CRH120 | UNS N08330 /WP330/CR330 | UNS N08367 /WP6XN/CR6XN | UNS N08800 /WPNIC/CRNIC | UNS N08810 /WPNIC10/CRNIC10 | |
UNS N08811 /WPNIC11/CRNIC11 | UNS N08825 /WPNICMC/CRNICMC | UNS N08925 /WP1925/CR1925 | UNS N08926 /WP1925N/CR1925N | UNS N10001 /WPHB/CR HB | |
UNS N10003 /WPHN/CR HN | UNS N10276 /WPHC276/CR HC 276 | UNS N10629 /WPVB4/CRVB4 | UNS N10665 /WPHB-2/CR HB2 | UNS N10675 /WPHB-3/CR HB3 | |
UNS N12160 /WPH160/CRH160 | UNS R20033 /WP3033/CR3033 | UNS R30556 /WPH556/CRH556 | |||
Product Form | |||||
ASME B16.9 | Long Radius Elbows,Long Radius Reducing Elbows,Long Radius Returns,Short Radius Elbows,Short Radius 180-deg Rerurns,3D elbows,Straight Tees,Straight Crosses,Reducing Outlet Tees,Reducing Outlet Crosses,Lap Joint Stub Ends,Caps,Reducers | ||||
ASME B16.28 | Short Radius Elbows,Short Radius 180-deg Returns | ||||
MSS SP43 | Long Radius Elbows,Straight and Reducing-on-the-Outlet Tees,Lap Joint Stub ends,caps,long radius 180 Degree returns,concentric reducers,eccentric reducers | ||||
Mss SP75 | Long Radius Elbows,3R elbows,straight tees,reducing outlet tees,caps,reducers |