Piping reference charts
Every chart on the site, free to use, download as CSV or print.
Piping standards directory
ASME, ASTM, API, EN, DIN, BS, ISO, JIS, GB, IS — what each standard covers.
Open →Material equivalent grades
ASTM ↔ UNS ↔ EN/DIN W.Nr ↔ JIS ↔ GB for 32 grades.
Open →Equivalent piping standards
ASME/ASTM vs EN, DIN, JIS and IS for pipe, flanges, fittings.
Open →Flange P-T rating chart
ASME B16.5 Group 1.1, Class 150–2500, −29 to 538 °C.
Open →Pipe schedule chart
OD and wall thickness for every schedule, ⅛" to 48".
Open →Pipe weight chart (CS)
Carbon steel pipe weight in kg/m, every schedule.
Open →Stainless steel pipe weight chart
SS 304/304L pipe weight in kg/m.
Open →SS 316 pipe weight chart
SS 316/316L pipe weight in kg/m.
Open →Duplex pipe weight chart
Duplex and super duplex pipe weight in kg/m.
Open →IS 1239 MS / GI pipe chart
Light, medium and heavy class OD, thickness and weight.
Open →MS plate weight chart
Steel plate weight per m² and per sheet, 1–150 mm.
Open →Round bar & TMT weight chart
kg/m for round, square and hex bar, 6–300 mm.
Open →BWG & SWG gauge chart
Tube and wire gauge to mm and inch.
Open →Stud bolt & nut size chart
UNC/8UN threads, heavy hex nut spanner sizes, stress area.
Open →NPT thread chart
Threads per inch and pipe OD for NPT sizes.
Open →NPS to DN chart
Nominal pipe size in inches to DN and OD.
Open →Buttweld fitting dimensions
ASME B16.9 elbows, tees, reducers, caps.
Open →Flange dimensions by size
ASME B16.5 Class 150 & 300, every size.
Open →Last updated 2026-11-02