must ensure complete penetration

[adelaida]

Подскажите, пожалуйста, верно ли я понимаю фразу "must ensure complete penetration":

the weld between shell and bottom head must be carried out and checked as follows: -all root defects must be removed before rewelding. -the weld aspect must be even and as smooth as possible. -the weld must be 100% x-ray examinated, with acceptance of faults according to code. the weld between support skirt and bottom head must be carried out and checked as follows: -if the head is fabricated in more than one piece, the external surface of bottom head welds must be flush-ground in the zone where it crosses the skirt-to-head weld. -the length of ground zone must be equal to the width of the skirt-to-headweld plus, as least, 2/3 of the width of the zone covered by the weld (on both sides). -after grinding and before welding skirt to the head, a 100% inspection must be carried out on this zone using penetrating liquids (or magnaflux where possible). -the first pass of the skirt-to-head weld *must ensure complete penetration*, since re-welding is not possible.

must ensure complete penetration - здесь проникновение наплавочного материала?

Спасибо.

[Toropat]

По смыслу complete penetration тут вроде как полный провар (или полное проплавление). Не путать с penetrating liquids (проникающими жидкостями, т.е. красителями).

[Amor 71]

Мне кажется, со слов "the first pass of the skirt-to-head weld" начинается разговор собственно о самой сварке. 

 A method of attaching a cylindrical supporting skirt to a cylindrical body portion of a vessel as defined in claim 1, in which said frusto conical surface at the smaller diameter thereof terminates in a curved surface whose curvature is suficient to provide access to the bottom of said groove for deposition therein of fusing weld metal with complete penetration into and interfusion with the metal defining the bottom of said groove.

http://patents.google.com/patent/US2967352A/en

Nozzles, manways, handholes and couplings should be attached to the vessel with full penetration welds, including reinforcing pad to nozzle neck welds.

http://www.engstack.com/kb/34/pressure-vessels-specification/

The efficiency for full penetration butt-welded joints, which are in compression across the entire thickness of the connected plates, may be taken as unity.

http://law.resource.org/pub/us/cfr/ibr/002/api.620.2002.pdf

[User]

Toropat +1

[adelaida]

Благодарю.