Steel Tube Handbook - 2018

37 Designation of steel for low temperature according to EN: P – steel for pressure equipments 215 – minimum yield strength in N/mm 2 N – normalized or normalising formed L – low temperature steel Alloy steels are designated according to the chemical composition - see page 9 Test category: Non alloy steels - TC1 or TC2 upon agreement in order Alloy steels - TC2 only TDC Steel grade Testing and certificates Other TDC standards Name Condition Surface Testing Certificate Marking Surfaceprotection Packing 10216-4 P215NL P265NL + N + N Normalized Conditions valid or both methods: Hot finished Cold finished • visually free from surface defects • adequate to production mode Category TC1 and TC2 • cast analysis • tensile test • flattening • drift expanding or • ring expanding • impact test (by dimension) • leak tightness (page 8) • dimensions • visual • NDT-to TC2 (page 8) • material identification • optional tests upon agreement 10204: • 3.1 • 3.2 See page 7 D ≤ 51 mm - label D > 51 mm - at end Data •producer •standard • steel grade • TC (C - in steel) • cast (code) • inspector’s mark • identification number Optionally: • additional marking upon agreement • without protection • upon agreement 17173 TTSt35N N V (N) V – quenched (quenching can be replaced with normalization) Conditions valid for both methods: Hot finished Cold finished Tests according to EN 50049 3.1.A 3.1.B 3.1.C 3603 430LT Hot finished • normalisingformed (HF) • normalized (N) Cold finished • normalized (N) • cast analysis • visual • tensile test • flattening • impact test • Cat.1 - ultrasonic • Cat.2 - leak tightness • hydraulic test • eddy current • test certification • test results 49-215 TU 42BT Cold finished • normalized N • product analysis • tensile test • flattening • drift expanding • visual • dimensions • NDT • leak tightness 49-001 Typ A Typ B Typ C