EN 287-1-1992 pdf download.Approval testing of welders for fusion welding Part 1 . Steels.
5 Essential variables for approval testing
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The criteria specifled in this clause shalt he examined In order to identify the ability of tiw welder in these areas. Each criterion s considered to be a signi&ant fattnr in the apprnvJ ttin.g
The welders approval test shall be carrIed out on test pieces and Is Independent of the type of constrncton.
5.2 WeldIng processes
Welding procses are defined in ISO 857 and reference
numbers of welding processes for cymhohc
repnentation are listed iii ISO 4063.
This standard coveni the foUowin wekling prtx’esses:
111 — iuetal-an weldii with covered elecTrode;
114 — flux-tored wire metal-arc welding without gas
shield;
121 — submerged arc welding with wire electrode:
131 — metal-arc inert gas welding (MIG welding);
135 — metal-anD active gas welding (MAG welding);
136 — flux-cored wire metal-arc welding with active
gas stüeld
137 — flux-cored wire metal-arc welding with inert gas
shleld
141 — tungsten men gas arc welding (TIG welding);
15— plasma arc welding;
311 — oxy-acet3lene welding;
other fusion welding processes by agreemenr
53 Joint types (butt and fillet welds)
Test pkces shall be produced for butt weld (BW) and
fillet weld (FW) ifl plates (P) orpipe) (T) for
44II1Jøa1 UI dCUVLUWI..x widEt .
5.4 Materiai groups
permitted by tables 4 and 5.
&4.2 Se1 groups fpcre.”.f ‘et&
5.4.2.1 General
For the comparison of steel groups for the approval of wtkkni and wtiding procedure wing according to
Pb3 )QQ 4) c.aa nnnnt, A
1.4.1 *7J, 1 Cal u ItA
5.4.2.2 Group WOl
Low-carbon unalloyed (carbon-rnanganesc’) steeLs and/or low alloyed aek.
This group also includes fine-grathed structural steel with a ,ield Slreflgth, ReH 0 N1flUfl2.
5.4.2.3 Group W02
Chromium-rnolybdenuii i (CrMo) and/or
chromium rno)ydenurn vanadium (CrMoV) creep-resisting steeLs.
5.4.2.4 Group W03
Finegrained stnicturai steeLs normalized, quenched and tempered as well as theimoireechanleally treated steels with a yield strgth, Reti> 360 NnMn2 as well as sunil.arly weldable mckel steels, with a nickel
content of 2% to 5
5.4.2.5 Group W04
F€mtic or martensatic stlnle steels, with a chromium content of 12 in 20 %
5.4.2.6 Group WI!
SIainle ferrluc4ustenitic and aitstenitic stamless chrornmrn-mckel (CrNi) steels.
5.5 (on,IImRhIes
5.5.1 Gene,-ui
it is assumed that in most approval tests the tiller
6 Range of approval for the welder
6.1 General
As a general rule, the test piece approves the welder not only for the condrnons used In the test, but also for all joints which axe considered easier to weld. The range of approval for each type of test is gwen in the relevant subclauses and tabli. In ther tahIec the TdIL)C Uf 4pfl)V’dl IS UldIUtWd ut 11w iiw horizvutai line.
6.2 WeldIng pmce
Figh ht n’b,mIhJ nnrrv iin nrvv’ A ‘h2nc.o rif
e new approval ttHowevert possible for a welder to be approved for more than one welding proce by a single tea. or by two sepamteappmvaitsmheiLdtn ‘over a iuwu-pruce JOuIL. rur e.xaiEtpIe, iii a case wnere approval is required for a single side butt joint with the root to be welded by TIG (141) without backing and to be filled by metal-arc welding wTth covered electrode (111), the welder may be approed by either of the following routes
a) succeful completion of an approval r simulaling the mtiIti-proees joint. i.e. the root run welded by TIG (141) wIthout backing. sutequent runs or 1ayei welded by metal-arc welding with covered electrode (111) withIn the limits of the range of approval for eacli welding process
b) sniccesñi1 completion of s’parare relevant approval Le one for TIG (141) without backing for the root run and a separate t for the fAll by metal-arc welding with covered electrode (111) with backing or welded from both sides with or without goung.
6.3 JoLnt typeR
Depending on the test piece, the range of welds for wiuich tne welder is approved is shown in table 3: the following criteria are applicab1e
a) approval for butt welds in pipes Includes butt welds in pLates;
b) approval for butt welds in plaLei in all relevuit positions covers butt welds on pipes having an nnt.cide diameter  500 mm, except item c) also applit
Oritp
ute II4L rti) Of IIUIILUIIdi jI94 X.IU(JII W.U IILCIUUC approval for butt joints in pipes of outside diameter  150 mm welded in similar pltinns according to table 7;
d) welding from one side without backing approves welds from one side with backing arid welds from both sides with and without gouging;
e) welding in plates or pipes with backing approves welds made from both sides, but not for welds without backing;
1) butt welds approve fillet welds for similar welding condiuolLs
g) Ln cases where the producUon work Ls predominantly filet welding, it is recommended that the welder should be approved also by an appropnare fillet welding te’. i.e. on plate, pipe or branch connection (see EN 2883);
h) welding from both sides without gouging appmv welds from one side with backing ared welds from both sides with gouging;
i) approval (or butt welds in pipes without backing Inclurlec appmvJ for hraneh ‘nnnection. within the same rangr of pn.vai in tabk 3 to 7. EN 287-1-1992 pdf download.

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