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BWE-standard for MW brick weld-evaluation of new design andprocess

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Background and purpose

The current standard dwr: Nr. 0000-44-41020 01 (Att. 01) is time consuming and

causes many defects. The urose of this e!a"uation is to #nd a more e$cient

way to we"d %ric&s into mem%rane wa""s with as few we"d defects as ossi%"e.

The new design and rocess was tested in 'uro 'a&o!ic in a co""a%oration

%etween * and 'uro 'a&o!ic .

Test no. 1 (01 to 04 Marc !010"

The #rst set of we"ds consisted of + %ric&s ,mm 14mm +mm r4 and distance

% was 14mm ies ' /+mm +/mm. ateria"s were 1/ro4-3 ie and stri.

A"" we"ding was done without interrutions (ecet %etween "ayers) starting in a

corner and ending in the same corner (otion 2).

Brick nu#ber$ bevel and radiograpic evaluation

1%!: No %e!e" ( 5oint) rounded %ric& 2 we"d asses from each side we"ded from

the side in (os. P6 7 P8). 2 gas ores (tye 2011) 2mm 7 2.3mm in the corners

and 1 "ac& of fusion (tye 401) 20mm ara""e" to the ie and etending through

to the stri to ie machine we"d. The we"d is 9may%e not aro!ed according to

*N 12;32-+ 7 '

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BWE-standard for MW brick weld-evaluation of new design andprocess

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4at osition (os. PA).This we"d has a 1/mm com%ined "ac& of fusion and "ac& of

enetration (tye 401 = 402) in the %ric& to stri we"d the imerfection is

erendicu"ar to the ies. This we"d cannot %e aro!ed at a"".

11%1!: The %ric& and stri was %e!e""ed from one side (B 5oint) at the to

%ottom and sides 2 we"d asses from one side and one from the %ac& side

we"ded in at osition (os. PA). This we"d has 2 ores (tye 2011) oC 1mm one

of them is in the corner and one is in the stri to %ric& we"d. The we"d is 9may%e

not aro!ed according to *N 12;32-+ 7 '

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BWE-standard for MW brick weld-evaluation of new design andprocess

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Test o. !

The stri width has %een changed to 1,mm thus ma&ing the %ric& "arger than the

ones used for test num%er 1. This time / %ric&s were we"ded using method /

otion 2 according to do& . 0000-44-41020 01 with / asses. Fnfortunate"y the

%ric&s were not made according to the drawing. The radiograhic e!a"uation

showed that none of the we"ds were acceta%"e according to any standard.

1. 100G "ac& of 6usion = enetration.

2. A tota" of / ores from 1.3 to /mm and 4 "ac& of fusions 2 with a directiontowards the ies.

/. A tota" of 2 ores from 1 and /mm and / "ac& of fusions a"" with a direction

towards the ies.

,onclusion !nd test

6urther in!estigation is reEuired....

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