BS EN 10217-1 Welded Steel Tubes for Pressure Purposes

Non-alloy steel tubes with specified room temperature properties

10217-1 Welded steel tubes Dimensions

Outside diameter: 5 to 2500mm

Wall thickness:0.5 to 50mm

10217-1 Welded steel tubes Chemical composition

Steel grade		C max.	Si max.	Mn max.	P max.	S max.	Cr Max.	Mo max.	Ni max.	Al min.	Cu max.	Nb max.	Ti max.	V max.	Cr+Cu+Mo+Ni max.
Steel name	Steel number
P195TR1	1.0107	0,13	0,35	0,70	0,025	0,020	0,30	0,08	0,30	–	0,30	0,010	0,04	0,02	0,70
P195TR2	1.0108	0,13	0,35	0,70	0,025	0,020	0,30	0,08	0,30	0,02	0,30	0,010	0,04	0,02	0,70
P235TR1	1.0254	0,16	0,35	1,20	0,025	0,020	0,30	0,08	0,30	–	0,30	0,010	0,04	0,02	0,70
p235TR2	1.0255	0,16	0,35	1,20	0,025	0,020	0,30	0,08	0,30	0,02	0,30	0,010	0,04	0,02	0,70
P265TR1	1.0258	0,20	0,40	1,40	0,025	0,020	0,30	0,08	0,30	–	0,30	0,010	0,04	0,02	0,70
P265TR2	1.0259	0,20	0,40	1,40	0,025	0,020	0,30	0,08	0,30	0,02	0,30	0,010	0,04	0,02	0,70

10217-1 Welded steel tubes Mechanical properties

Steel grades		Tensile properties					Impact properties
Steel name	Steel number	Upper yield strength ReH  min for T mm   T d 16 16 < T d 40 MPa		Tensile Strength Rm MPa	Elongation A min. % b c		Minimum average absorbed energy KV  J at a temperature of °C
							l		t 0
					l	t	0	-10
P195TR1	1.0107	195	185	320-440	27	25	–	–	–
P195TR2	1.0108	195	185	320-440	27	25	40	28	27
P235TR1	1.0254	235	225	360-500	25	23			–
P235TR2	1.0255	235	225	360-500	25	23	40	28	27
P265TR1	1.0258	265	255	410-570	21	19	–	–	–
P265TR2	1.0259	265	255	410-570	21	19	40	28	27

10217-1 Welded steel tubes Tube manufacture and delivery conditions

Route N°	Manufacturing Process		Manufacturing routes		Delivery Condition a	Applicable for quality
	Process	Symbol	Starting material	Forming operation
						TR1	TR2
1a	Electric welded b	EW	As (hot) rolled strip	Cold formed (+ welded)	As welded	X	—
1b					NW	x	—
1c					NP	x	x
2a			Normalising rolled strip		As welded	x	—
2b					NW	x	x
2c					NP	x	x
3			As (hot) rolled or normalising rolled strip	Cold formed (+ welded) + hot stretch reduced at a controlled temperature to give a normalised condition	NR	x	x
4			Cold rolled + stress relieved	Cold formed (+ welded)	NP	x	x
11a	Submerged arc- welded   – Longitudinal seam or – helical seam	SAW: -SAWL     -SAWH	As (hot) rolled plate or strip	Cold formed (+ welded)	As welded	x	—
11b					NW	x	—
11c					NP	x	x
12a			Normalising rolled plate or strip	Cold formed (+ welded)	As welded	x	x
12b					NW	x	x
12c					NP	x	x
13a			As in lines 11 or 12	Normalising-formed (+ welded)	As welded	x	x
13b					NW	x	x
13c					NP	x	x
21	Continuous welded, only for steel grades P195 and P235 with D d 114,3 mm	BW	As (hot) rolled strip	Hot forming (+ welded)	As welded	x	—
a As welded = no heat treatment; NP = Full pipe normalised ; NW = Normalised weld zone; NR= Normalised rolled b For tubes of quality TR2 , only high-frequency welding, minimum frequency 100 kHz, (symbol = HFW) is permitted.

10217-1 Welded steel tubes Appearance

The tubes shall be free from external and internal surface defects that can be detected by visual examination.

The internal and external surface finish of the tubes shall be typical of the manufacturing process and, where applicable, the heat treatment employed. Normally the finish and surface condition shall be such that any surface imperfections requiring dressing can be identified

It shall be permissible to dress, only by grinding or machining, surface imperfections provided that, after doing so, the wall thickness in the dressed area is not less than the specified minimum wall thickness. All dressed areas shall blend smoothly into the contour of the tube.

Surface imperfections which encroach on the specified minimum wall thickness shall be considered defects and tubes containing these shall be deemed not to conform to this Part of EN 10217.

Repairs to the weld seam of EW or BW tubes are not permitted. Repairs to the weld seam of SAW tubes are permitted in accordance with an established and agreed procedure.

10217-1 Welded steel tubes Straightness

The deviation from straightness, of any tube length L, shall not exceed 0,0015 L. Deviations from straightness over any one metre length shall not exceed 3 mm.

10217-1 Welded steel tubes Preparation of ends

Tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs.

10217-1 Welded steel tubes Inspection

Cast analysis

Tensile test on base material

Transverse tensile test

Flattening test

drift expanding test

Weld bend test for SAW tubes

Leak-tightness test

Dimensional inspection

Visual examination

NDT of the weld

10217-1 Welded steel tubes Options

1)Tube manufacturing process and/or route

2)Selection of the delivery condition

3)Restriction on copper and tin content

4)Product analysis

5)Longitudinal impact testing at –10 C for quality TR2

6)Selection of leak-tightness test method

7)Special end preparation

8)Exact lengths

9)Specific inspection for quality TR1

10)Type of inspection document other than the standard document

11)Tensile test on the weld for tubes with 219,1 < D d 508 mm

12)Test unit restriction for tubes with D d 76,1 mm of quality TR2

13)Wall thickness measurement away from the ends

14)Non-Destructive Testing method

15)Additional marking

16)Protection