What are flanges connecting 150CL, 300CL, 150CL and 300CL? How much pressure? What are flanges, LF/SE-RF, LF, SE and RF?
Flange connections, 150CL, 300CL, 150CL and 300CL are pound levels, and the corresponding metric units are PN20 and PN50 respectively. LF: English flange LF/SE-RF Lapped Flange acronym (loose flange), SE: English Stub Ends acronym, RF (welding ring) for English Raised face (an acronym for sealing surface for the process surface)
This is all American Standard product standards. I have the standard.
You can refer to: chemical industry standards HG/T 20592, 20615, steel pipe flanges, gaskets, fasteners. There are the European system, the PN series, the American system, the Class series. Class150 indicates nominal pressure equal to PN20, nominal pressure Class300 equal to PN50. In the production of people generally call the numerical Class as Class300 pounds, and 300 pounds, you hear from the name you can say, is the American Standard system. PN after the number is called kg, such as PN40 said 40 kg of flange, the other side will know.In the old standard, the number of units after PN was MPa, and Class150 equals PN2.0, equal to 2MPa (old standard)Now the new standard, PN after the numerical unit of bar, is the old standard of ten times the value. Class150 equals PN20, equal to 2MPa (new standard)Most of the current production of new standards, the old standard rarely used.LF/SE indicates the weld ring loose flange, where LF represents loose flange and SE indicates weld ring. This flange type combination, a pair of specific structures, you refer to the kind of bar, there is a problem, and then exchange.
