非標法蘭
Non-standard flanges will only be used in cases where pressure, temperature and size requirements exceed the capabilities of standard flanges. Keep in mind that non-standard flanges require calculation, design and special manufacturing procedures, which is why they are chosen only as a last resort. The most common such applications are large equipment flanges and heat exchangers body flanges.
Non-standard flanges are designed and calculated according to ASME VIII Div.1 Appendix 2 and Appendix S, and according to ASME VIII Div.2 part 4.16.
Design criteria
Rules for the design of bolted flange connections as described in Div.1 Appendix 2 apply to flanges with gaskets placed entirely within the circle enclosed by the bolt holes and with no contact outside this circle.
This method is applicable to circular flanges under internal pressure and takes into account only hydrostatic end loads and gasket seating loads. Rules have been further modified so that they can be applied to the design of flanges under external pressure, reverse flanges and flanges with nut stops.
Design procedure for large diameter, low pressure flanges shall be supplemented by methods other than the code e.g.: check flange rotation. Flanges greater than 60 inches (1524 millimeters) inside diameter and designed for up to 100 psig (689 KPa) pressure fall under this category.
尺寸
非標法蘭：1/4″ -160″
DN8-DN4000
材料：
碳鋼：ASTM A105，ASTM A105N，GB 20，C22.8。
合金鋼：ASTM / ASME A182 F1-F12-F11-F22- F5-F9- F91
不銹鋼：ASTM / ASME A182 F304-304L-304H-304LN-304N
ASTM / ASME A182 F316-316L-316H-316LN-316N-316Ti
ASTM / ASME A182 F321-321H，F347-347H
低溫鋼：ASTM / ASME A350 LF2。
高性能鋼：ASTM / ASME A694 F42，F52，F56，F60，F65，F70
法蘭面對型
美國系列：平面（FF），抬高面（RF），舌（T），溝槽（G），女性（F），男性（M），環形關節面（RJ / RTJ）
歐洲系列：A型（平面），B型（凸起面），C型（舌頭），D型（槽形），E型（螺口），F型（凹口），G型（O型環螺口）， H型（O形環槽）
壓力
美國系列：150級，300級，600級，900A級，1500級，2500級。
歐洲系列：PN2.5，PN6，PN10，PN16，PN25，PN40，PN63，PN100，PN160，PN250，PN320，PN400。
標準
我們的非標法蘭可根據通用標準生產，並可根據客戶要求做一些修改。
ASME ANSI B16.5，ASME ANSI B16.47。
API 605，API 6L。
MSS SP 44
CSA Z245.12
EN1092-1，EN1759-1。
DIN2630，DIN2631，DIN2632，DIN2633，DIN2634，DIN2635，DIN2636，DIN2637，DIN2638。
BS1560，BS 4504，BS 10。
信諾NF E29-200-1
ISO7005-1
AS2129
JIS B2220
UNI 2276.UNI 2277.UNI 2278.UNI 6089.UNI 6090
工業流程
模鍛，機加工。
非標準法蘭的應用
天然氣，化工，石油，造船，船舶，造紙，冶金，電力，電力，鍋爐等
