EN 10216 is the universal standard for seamless pipes for pressure applications in the European Union.
Lowercase ‘’d’’ means: specified inner diameter;
Lowercase ‘’dmin’’ means: specified minimum inner diameter;
‘’Tmin’’ means: specified minimum wall thickness;
‘’Dc’’ means: calculated outer diameter/nominal outer diameter;
‘’dc’’ means: calculated inner diameter;
‘’Tc’’ means: calculated wall thickness/nominal wall thickness;
Uppercase ‘’TC’’ means: test type (i.e. divided into TC1 and TC2);
‘’P’’ in material/grade/steel grade means pressure bearing;
“N” normalizing;
“N+T” normalizing + tempering
“QT” quenching + tempering (air cooling or water cooling);
“I” isothermal annealing;
