Welded Steel Tubes EN10217-1 P195TR1 P235TR1 P265TR1 for Pressure Purposes

Welded Steel Tubes EN10217-1 P195TR1 P235TR1 P265TR1 for Pressure Purposes

EN10217-1 Welded steel tubes for pressure purposes - Technical delivery conditions -

China Welded Steel Pipe manufacturer, choose the high quality Spiral Welded Steel Pipe, High Frequency Welded Steel Pipe, Black Carbon Steel Welded Pipe, Oval Steel Tube etc.

Part 1: Non-alloy steel tubes with specified room

temperature properties

Since 2nd century, the welding seam quality increased a lot with fast development of excellent quality Steel Coil production, welding technology and inspection technology improvement, more welding steel tube sizes are available, and gradually widely used in different areas to replace seamless steel tube.

Material:
Fully killed steel, Fine grain steel with a ferritic grain size.

Steel Names:
In accordance with EN10027-1 and CR10260

Manufacture:
HFW High frequency welded
SAW Submerged arc welded - longiditudinal seam - SAWH
- helical seam - SAWL

Welding Procedure:
Testing and inspection of the welding procedure for submerged ard welded(SAW) tubes are witnessed and approved in accordance with EN10217-1

Apperance and General:
The weld areas are free from cracks, lack of fusion and lack of penetration
The tubes are free from external surface defects that can be detected by visual examination.

Leak-tigthtness:

The Tubes shall pass a hydrostatic test or electromagnetic test for leak-tightness

Non-Destructive Testing:

The full length of the weld seam of all EW and BW tubes ahll be subjected to a Non-Destructive test for detection of longitudinal imferfections

The full length of the weld seaml of all SAW tubes shall be subjuected to a Non-Destructive test for the detection of imperfections.

Straightness:

The deviation from straightness, of any tube length L, shall not exceed 0.0015L.

Deviations from Straightness over any one meter length shall not exeed 3mm.

Preparation of ends:

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

Testing and inspection of the welding procedure for submerged arc welded (SAW) tubes in accordance with EN10217-1AnnexA

Testing and inspection of the welding procedure for SAW tubes witnessed and approved in accordance with EN10217-1 AnnexA

Tube Manufacturing Process, route and delivery condition:

Rounte No.	Manufacturing Process		Manufacturing routes		Delivery condition	Applicable for quality
	Process	Symbol	Starting material	Forming operation		TR1	TR1
1a	Electric welded	EW	As(hot) rolled strip	Cold formed(+welding)	As welded	X	-
1b					NW	X	-
1c					NP	X	X
2a			Normalized 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 normailsed condition	NR	X	X
4			Cold Rolled + streass 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			Normaliseing 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	Continous welded, only for steel grades P195 and P235 with D ≤114.3mm	BW	As(hot) rolled strip	Hot formed(+welded)	As welded	X	-
a As wekded = no heat treatment. NP=Full pipe normalsed. NW= Normalised weld zone. NR=Normaised rolled b For tubes of quqality TR2, only high-frequency welding, minimum frequency 100kHz,(symbol=HFW) is permited

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