Welding
All about welding, arranged by
TÜV SÜD Industrie Service GmbH and our Partner AIR LIQUIDE Deutschland GmbH
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| Approval of welding procedures |
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| Schweißen hochfester Stähle |
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| Schweißen hochlegierter Stähle |
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| Arbeitshilfen, Tipps und Tricks |
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 | Test standards |
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 | Test standards |
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Overview of test current standards Specification and approval of welding procedures for metallic materials
* Approval procedures in pressure-vessel production (AD-Merkblatt HP 2/1
"Procedure test of welded joints") |
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik
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| Welding procedure tests |
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| Welding procedure tests |
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EN 288-3, 4 "Welding procedure test" - Approval of welding procedures
Principle of application according to DIN EN 288 - 3 / - 4
Product standard and/or terms of delivery
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Product standards (e.g. AD Code o. Pr. HP 2/1) require evidence of approved
welding procedures as per EN 288-3 or -4. In this context, it is possible
to stipulate additional requirements and restrictions to those outlined
in the standard.
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Preliminary welding procedure specification (pWPS) as per
DIN
EN 288 - 2
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The preliminary welding procedure specification must be prepared by the
manufacturer as per EN 288-2. It must define the range of all essential
parameters (welding requirements) and is a prerequisite for the approval
procedure.
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EN 288 - 3 / - 4
"Procedure tests"
- steel / aluminium
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Test-piece manufacturing (form and dimensions cf. EN 288-3 or -4) as
per specifications contained in the pWPS. Manufacturing details are recorded
by the competent body.
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Welding-procedure approval report (WPAR)
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Non-destructive and destructive tests of test pieces in line with the
requirements of EN 288-3 or -4 and any additional requirements outlined
in the product standard, if any. The welding-procedure approval report (documented
by the competent body) records test-piece manufacturing and evaluation results
and defines the range of approval.
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Welding-procedure specification (WPS)
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The competent body confirms the pWPS on the basis of the welding procedure
approval report. The welding procedure specification (WPS) thus serves as
evidence of the specified welding procedure for the manufacturer and entitles
the latter to manufacture within the defined range of approval.
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Dr. Pek / TÜV
SÜD Industrie Service GmbH / Werkstoff und Schweißtechnik
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| Range of appr. weld types |
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| Range of appr. weld types |
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EN 288-3, 4 “Welding procedure tests”
Range of approval weld types 
Key to symbols: (O) approved in approval test ; (x) also approved
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik
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| Material groups for steels |
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| Material groups for steels |
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EN 288-3, 4 "Welding procedure tests"
Material groups for steels (DIN EN 288-3) (including comparison of material groups as per DIN EN 287, part 1)
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik |
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| Material groups Aluminium |
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| Material groups Aluminium |
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EN 288-3, 4 "Welding procedure tests
Material groups for aluminium and its alloys
(DIN EN 288 - 4) (including comparison of material groups as per DIN EN 287, part 2)
Note: The alloy content relatesto the reference analysis
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik |
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| Dissimilar metal joins |
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| Dissimilar metal joins |
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EN 288-3, 4 "Welding procedure tests"
Material groups - range of approval for dissimilar metal joints (DIN EN 288 - 3 / DIN EN 288 - 4)
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik |
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| Dimensions |
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| Dimensions |
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EN 288-3, 4 "Welding procedure tests"
Range of approval for dimensions (wall thickness, diameter, a-dimension) Range of approval for wall thickness + AD-Mbl. HP 2/1
For gas fusion welding the following applies: test-piece thickness t -> range of approval 0.75 t to 1.25 t. Procedure tests for multi-run welds do not apply to single-run welds
Range of approval for diameters (Pipe and pipe branches)
Approvals granted for plates are also valid for pipes with Ø >= 500 mm
Range of approval for fillet welds
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik |
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| Welding positions |
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| Welding positions |
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| Group classification (steel) |
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| Group classification (steel) |
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Information about new test standards
Future group classification of steels [ISO/TR 15608:04/2000(E)] (Comparison with EN 288-3 and EN 287-1)
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik |
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| Group classification (aluminium) |
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| Group classification (aluminium) |
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Information about new test standards
Future group classification for aluminium [ISO/TR 15608:04/2000(E)] (Comparison with EN 288-4 and EN 287-2)
Dr. Pek / TÜV SÜD Industrie Service GmbH
/ Werkstoff und Schweißtechnik
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