The fascinating world of pipe sizes: acronyms IPS, NPS, ID, DN, NB, SCH, SRL, DRL mean ?
1.DN is a European terms that means “normal diameter”, equal to NPS, DN is NPS times 25(example NPS 4=DN 4X25= DN 100).
2.NB means “nominal bore”,ID means “internal diameter”.they are both synonyms of nominal pipe size(NPS).
3.SRL AND DRL(Pipe Length)
SRL AND DRL are terms related to the length of pipes. SRL stands for “single random length”, DRL for “double random length”
a.SRL pipes have any actual length between 5 and 7 meters（i.e.“random”).
b.DRL pipes have any actual length between 11-13 meters.
Post time: Aug-16-2020