What do you mean by "s" in the standard of pipe joint?
Did the landlord say "S" and "L"? S is a high voltage application, for example, at the P port. L is low voltage applications, generally used only in the oil return.
Pointing to the nut s generally have a value, is a relatively flat nut two distance, that is the size of the wrench or view "Satisfaction, please adopt
In hydraulic couplings, the S denotes the heavy series, L denotes the light series, M denotes metric threads, and R stands for English threads
