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EN10217-6 Submerged arc welded non-alloy steel tubes
EN10217-6 Welded steel tubes for pressure purposes - Technical
delivery conditions -
Part 6: Submerged arc welded non-alloy steel tubes with specified low
temperature properties
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 | |||||||
EN10217-1 Part 1: Non-alloy steel tubes with specified
room temperature properties
EN10217-2 Part 2: Electric welded non-alloy and alloy
steel tubes with specified elevated
temperature
properties
EN10217-3 Part 3: Alloy fine grain steel tubes
EN10217-5 Part 4: Electric welded non-alloy steel tubes
with specified low temperature
properties
EN10217-5 Part 5: Submerged arc welded non-alloy steel
tubes with specified low
temperature
properties
EN10217-6 Part 6: Submerged arc welded non-alloy steel
tubes with specified low
temperature
properties
EN10217-7 Part 7: Stainless steel tubes.
Normative References:
EN 760, Welding consumables - Fluxes for submerged arc
welding - Classification
EN 895, Destructive tests on welds in metallic materials -
Transverse tensile test
EN 910, Destructive tests on weld in metallic materials -
Bend test
EN1321, Destructive tests on welds in metallic materials -
Macroscopic and microscopic examination
of welds
EN10002-1, Metallic materials - Tensile testing - Part 1:
Method of test at ambient temperature
EN10002-5, Metallic materials - Tensile testing - Part 5:
Method of tesing at elevated temperature
EN10020, Definitions and classification of grades of steel
EN10021, General techical delivery requirements for steel and
iron products
EN10027-1, Destructive systems of steels - Part 1: Steel
names, principle symbols.
EN10027-2, Designation systems for steels - Part 2: Numerical
systems.
EN10045-1, Metallic materials - Charpy impact test - Part 1: Test
method
EN10052, Vocabulary of heat treatment terms of ferrous
products
EN10204, Metallic products - Types of inspection
documents
EN10200, Seamless and welded steel tubes - Dimensions
and masses per unit length
EN10233, Metallic materials - Tubes - Flattening test
EN10234, Metallic materials - Tubes - Drift expanding
test
EN10236, Metallic materials - Tubes - Rings expanding
test
EN10237, Metallic materials - Tubes - Ring tensile
test
EN10246-1, Non-Destructive Testing of steel tubes Part 1:
Automatic electromagnetic testing of
seamless and welded ( except submerged arc welded)
ferromagnetic steel tubes for
verification of hydraulic leaktightness
EN10246-3, Non-Destructive Tesing of steel tubes - Part 3:
Automatic eddy current testing of seamless
and welded ( except submerged arc-welded) steel tubes
for detection of imperfections.
EN10246-5, Non-Destructive Testing of steel tubes - Part 5:
Automatic full peripheral magnetic
transducer/flux leakage testing of seamless and welded
(except submerged arc-welded)
ferromagnetic steel tubes for the detection of
longitudinal imperfections
EN10246-6, Non-Destructive Tesing of steel tubes - Part 6:
Automatic full peripheral ultrasonic testing of
seamless steel tubes for the detection of transverse
imperfections.
EN10247-7, Non-Destructive Testing of steel tubes - Part 7:
Automatic full peripheral ultrasonic testing of
seamless and welded ( except submerged arc welded)
steel tubes for the detection of
longitudinal imperfections.
EN10246-8, Non-Destructive Testing of steel tubes - Part 8:
Automatic ultrasonic testing of the weld
seam of electric welded tubes for the detection of
longitudinal imperfections.
EN10246-9, Non-Destructive Testing of steel tubes - Part 9:
Automatic ultrasonic testing of the weld
seam of submerged arc-welded tubes for the detection
of longitudinal and/or
transverse imperfections.
EN10246-10, Non-Destructive Testing of steel tubes - Part 10:
Radiographic testing of the weld
seam of automatic fusion arc-welded tubes for
the detection of imperfections.
EN10246-14, Non-Destructive Testing of steel tubes - Part 14:
Automatic ultrasonic testing of the
seamless and welded (except submerged arc
welded) steel tubes for detection of laminar
imperfections
EN10246-15, Non-Destructive Testing of steel tubes - Part 15:
Automatic ultrasonic testing of strip/plate
used in the manufacture of steel tubes for
detection of laminar imperfections
EN10246-16, Non-Destructive Testing of steel tubes - Part 16:
Automatic ultrasonic testing of the area
adjacent to the weld seam of welded steel tubes
for the detection of laminar imperfections
EN10246-17, Non-Destructive Testing of steel tubes - Part 17:
Automatic ultrasonic testing of tube ends
of seamless and welded steel tubes
for the detection of laminar imperfections
EN10256, Non-Destructive Testing of steel
tubes - Qualification and competence of level 1 and level 2
NDT personnel
prEN 102661) Steel tubes, fittings and structural hollow sections - Symbols and definition of terms for use in product standards
EN ISO 377,Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997)
prEN 10168 1) Iron and steel products - Inspection documents - List of information and description
EN ISO 2566-1, Steel - Conversion of elongation values – Part 1: Carbon and low-alloy steels (ISO 2566-1:1984)
ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition
CR 10260, Designation systems for steel - Additional symbols
CR 10261, ECISS Information Circular IC 11 - Iron and steel - Review of available methods of chemical analysis.
| As(hot) rolled strip |
