PN-EN 10216-2, DIN 17175 ||| Pipes for pressure purposes with specified elevated temperature properties. Boiler tubes

PN-EN 10216-2, DIN 17175 Pipes for pressure purposes with specified elevated temperature properties. Boiler tubes

Boiler tubes are used in heat exchange appliances in which the energy is transferred from one medium to the other. The pipes are manufactured from carbon and low-alloy steel grades which are resistant to loads under high pressure and temperatures. They are used for the construction of power engineering appliances such as: boilers, heating coils, stoves, heaters, heat exchangers.

The pipes are manufactured with the diameters between 21,3 – 660 mm and with the wall thickness of up to 100 mm in the case of hot rolling, and with the diameters between 10,2 – 108 and with the wall thickness of up to 12,5 mm in the case of cold drawing. The pipes are manufactured with TC1 tests (I requirement level) and TC2 (III requirement level) according to PN-EN10216-2.

PN-EN10216-2

Steel grades used	Details: Table 1
Dimensions and tolerances	Details: Table 2
Pipe lengths	Pipes with precise lengths are manufactured with the following tolerance values: for pipes 0- 6m -0/+10% for pipes 6-12m -0/+15% for pipes longer than 12m -0/to be negotiated
Tightness	Pipes should be subject to water testing (7Mpa) or electromagnetic testing.
Straightness	< 0,0015 of pipe length (below 3mm per every meter of pipe length)
Tests	Details: Table 3

Table 1

Mechanical properties
Pipe types	Steel grades	Mechanical properties during tensile testing in room temperature							Resilience
Boiler P195GH, P235GG P265GH 16Mo3 14MoV6-3 13CrMo4-5 10CrMo9-10 Wg PN-EN 10216-2		Upper yield limit or yield strength Re or R0,2 for wall thickness of t min				Tensile strength Rm	Elongation A min%		Minimum energy average absorbed KVJ at the temperature of 0°C
		T<\=16	16<T<\=40	40<t<\=60	60<T<\=60	Tensile strength Rm	Elongation A min%		I		T
		MPa	MPa	MPa	MPa	MPa	I	t	20	0	-10	20	0
	P195GH	195	-	-	-	320- 440	27	25	-	40	28	-	27
	P235GH	235	225	215	-	360- 500	25	23	-	40	28	-	27
	P265GH	265	255	245	-	410- 570	23	21	-	40	28	-	27
	16Mo3	280	270	260	-	450- 600	22	20	40	-	-	27	-
	14MoV6-3	320	320	310	-	460- 610	20	18	40	-	-	27	-
	13CrMo4-5	290	290	280	-	440- 590	22	20	40	-	-	27	-
	10CrMo9-10	280	280	270	-	480- 630	22	20	40	-	-	27	-

Steel grades	CHEMICAL COMPOSITION (LADLE ANALYSIS)
Steel grades	C% max	Si% max	Mn% max	P% max	S% max	Cr% max	Mo% max	Ni% max	Al.cał% min	Cu% max	Nb% max	Ti% max	V% max	Cr+ Cu+ Mo+ Ni% MAX
P195GH	0,13	0,35	0,70	0,025	0,020	0,30	0,08	0,30	>\= 0,020	0,30	0,010	0,040	0,02	0,70
P235GH	0,16	0,35	1,20	0,025	0,020	0,30	0,08	0,30	>\= 0,020	0,30	0,010	0,040	0,02	0,70
P265GH	0,20	0,40	1,40	0,025	0,020	0,30	0,08	0,30	>\= 0,020	0,30	0,010	0,040	0,02	0,70
16Mo3	0,12- 0,20	0,35	0,40- 0,70	0,025	0,020	0,30	0,25- 0,35	0,30	>\= 0,020	0,30	-	-	-	-
14MoV6-3	0,10- 0,15	0,15- 0,35	0,40- 0,70	0,025	0,020	0,30- 0,60	0,50- 0,70	0,30	>\= 0,020	0,30	-	0,22-0,28	-	-
13CrMo4-5	0,15	0,50- 1,00	0,30- 0,60	0,025	0,020	1,00- 1,50	0,45- 0,65	0,30	>\= 0,020	0,30	-	-	-	-
10CrMo9-10	0,10- 0,17	0,35	0,40- 0,70	0,025	0,020	0,70- 1,15	0,40- 0,60	0,30	>\= 0,020	0,30	-	-	-	-

Table 2

Outside diameter and wall thickness tolerances
Outside diameter D mm	Permissible deviations of outside diameter D	Permissible deviations of wall thickness t depending on the T/D ratio
		<\=0,025	>0,025 <\=0,050	>0,050 <\=0,10	>0,10
D<\=219,1	+\- 1% or =\- 0,5mm depending on which is greater	+\- 12,5% or 0,4 mm depending on which is greater
D>219,1		=\- 20%	=\- 15%	=\- 12,5%	=\- 10%
For the outside diameter of D>\=355,6 mm, local deviation outside of the upper deviation limit by further 5% of the wall thickness T is permitted

Inside diameter and wall thickness tolerances
Permissible deviations of inside diameter		Permissible T deviations depending on the T/d ratio
d	dmin	<\-0,03	>0,03 <\=0,06	>0,06 <\=0,12	>0,12
+\- 1% or +\- 2mm depending on which is greater	+2% +4mm depending on which is greater	+\-20%	+\-15%	+\-12,5%	+\-10%
For the outside diameter of D>\=355,6 mm, local deviation outside of the upper deviation limit by further 5% of the wall thickness T is permitted

Table 3

EN 10216-2:2002

Inspection and test type		Test frequency	Test category
Mandatory tests	Ladle analysis	One per ladle	1	2
	Tensile testing in room temperature	One per every test pipe	X	X
	Flattening test for D<600mm and the ratio of D<\=0,15 but T<\=40mm or ring testing for D>150mm and T <\=40mm		X	X
	Rolling test on a mandrel bar for D<\=150mm and T<\=10mm or ring testing for D<\=114,3mm and T <\=12,5mm		X	X
	Resilience testing at the temperature of 20 ºC		X	X
	Tightness testing	Every pipe	X	X
	Dimensional testing		X	X
	Visual inspection		X	X
	NDT in order to identify longitudinal discontinuity	Every pipe	X	X
	Material identification for alloy steel	Every pipe	X	X
Optional tests	Final product analysis	One per ladle	X	X
	Tensile testing at elevated temperature	One per ladle and for the same thermal processing conditions	X	X
	Resilience testing	One per every test pipe	X	X
	Resilience testing in the machine direction at the temperature of -10ºC for non-alloy steel grades	One per every test pipe	X	X
	Wall thickness measurement at a distance from pipe ends		X	X
	NDT in order to identify transverse discontinuity	Every pipe	X	X
	NDT in order to identify delamination	Every pipe	X	X

DIN 17175

Grades: St 35.8, St 45.8, 15Mo3, 13CrMo44, 10CrMo910, 14MoV63

Mechanical properties of seamless steel pipes for elevated temperatures tested in room temperature
Pipe types	Steel grades	Tensile strength Rm	Yield limit for walls in mm max			Elongation at break (Lo=5do) max		Resilience work of the transverse DVM sample J max
Seamless steel pipes for elevated temperatures St 35.8, St 45.8, 15Mo3, 13CrMo44, 10CrMo910, 14MoV63 according to DIN 17175		Tensile strength Rm	<\=16	>16-<\=40	>40-<\=60	Elongation at break (Lo=5do) max
		MPa	MPa	MPa	MPa	1	t
	St35.8	360-480	235	225	215	25	23	34
	St45.8	410-530	255	245	235	21	19	27
	15Mo3	450-600	270	270	260	22	20	34
	13CrMo44	440-590	290	280	280	22	20	34
	10CrMo910	450-600	280	280	270	20	18	34
	14MoV63	460-610	310	320	310	20	18	41

Steel grades	CHEMICAL COMPOSITION (LADLE ANALYSIS)
Steel grades	C% max	Si% max	Mn% max	P% max	S% max	Cr% max	Mo% max	Ni% max	V% max	Color code
St35.8	0,17	0,10-0,35	0,40-0,80	0,040	0,040	-	-	-	-	White
St45.8	0,21	0,10-0,35	0,40-1,20	0,040	0,040	-	-	-	-	Yellow
15Mo3	0,12-0,20	0,10-0,35	0,40-0,80	0,035	0,035	-	0,25- 0,35	-	-	Yellow and carmine red
13CrMo44	0,10-0,18	0,10-0,35	0,40-0,70	0,035	0,035	0,70- 1,10	0,45- 0,65	-	-	Yellow and silver
10CrMo910	0,08-0,15	0,50	0,40-0,70	0,035	0,035	2,00- 2,50	0,90- 1,20			Red and green
14MoV63	0,10-0,18	0,10-0,35	0,40-0,70	0,035	0,035	0,30- 0,60	0,50- 0,70	-	0,22- 0,32	Red and silver

Test scope for seamless pipes in both quality stages and the responsibility for test execution

No	Tests	Stage I	Stage III	Responsible for test execution
1	Tensile testing	On two pipes per batch in two first batches, on one pipe per every subsequent batch	On two pipes per batch in two first batches, on one pipe per every subsequent batch	Manufacturer
2	Vibration bending test	On pipes according to no 1	On pipes according to no 1	To be negotiated
3	Ring testing	At one of the pipe ends according to no 1	Depending on the diameter, for 20% of cylindrical length or partial length, on one side or for 100% of cylindrical length or partial length on both sides, potentially also on one side	To be negotiated
4	Non-destructive testing		All pipes	To be negotiated
5	Surface inspection	All pipes	All pipes	Manufacturer
6	Dimensional testing	All pipes	All pipes	To be negotiated
7	Tightness testing	All pipes	All pipes	Manufacturer
8	Room inspection		All alloy pipes	Manufacturer
9	Detailed testing no 9, no10 Check analysis	To be negotiated	To be negotiated	Manufacturer
10	Tensile testing at elevated temperatures	If not agreed otherwise, 1 sample per one ladle and in one size or 1 sample per one ladle and annealing (without thermal processing)	If not agreed otherwise, 1 sample per one ladle and in one size or 1 sample per one ladle and annealing (without thermal processing)	To be negotiated