WS 1 - Schweissplan.pdf

[Seite 1]

Control sheet Commercial in confidence

WELDING SCHEDULE

The information contained in the document is Confidential and is not to be disclosed to a third party without written permission from Baltic Workboats AS

Project PATROL 29 WP HYBRID By DV Approved SN Date 26/06/2023 File name see footer Document No 236-01.800.03

Document history

236-01.800.03-D Welding Schedule.xlsx 1 of 8

[Seite 2]

PATROL 29 WP HYBRID

WELDING SCHEDULE

NOTES

1. All welding to be in accordance with Lloyds Register's Rules and Regulations for the Classification of Special Service Craft, Part 7, Chapter 2, Sections 3 & 4.
2. This welding schedule covers type of welding and design throat thickness limits only. All other welding details, edge preparation, consumables etc. are to be in accordance with approved weld procedures to Surveyor's satisfaction.
3. Any welding not specified in this schedule is to be in accordance with the relevant drawings or decided on-site, based on the information contained herein and to Surveyor's satisfaction.
4. Butt welds • All plating seams and butts are to be full penetration welds from one side only, with back gouging/sealing run or temporary backing bar on the other side. • Where the difference in thickness between plates exceeds 2mm on either side, the thicker plate is to be tapered with a minimum 3:1 taper.
5. Fillet welds • The design throat thicknesses specified in this schedule are intended as minimum design limits for the approval of fillet joins. Any welding in excess of these limits is to be to Surveyor's satisfaction.
6. Intermittent welding • Secondary stiffeners: welding is to be double continuous in way of end connections (matched pair of welds at each end) and in way of end brackets where applicable. The length of DC welds is to be not less than the web depth of the secondary stiffener or 0.1 x span, whichever is the greater. Where brackets are fitted the length of DC welds is to be measured from the end of the bracket. • Primary members: welding is to be double continuous in way of end connections for a distance approximately equal to 0.2 x span from the ends (generally up to the first or second secondary stiffener). • Fabricated members: welding of webs to face flats is to be double continuous in way of end brackets/knees, pillar heads/heels etc. and for a distance beyond such brackets/knees/attachments of not less than the web depth of the stiffener (or as above if greater). • Where longitudinals, beams, frames, etc. pass through slotted girders, floors or stringers, there is to be a matched pair of welds on each side of such intersection, and the stiffeners are to be attached to the web of the primary member by double continuous welds. • Welding is to be made continuous around the ends of brackets, lugs, scallops etc. • Where it is required to adjust the welding to suit stiffener spans or spacings, this is to be achieved by increasing the length of the fillet and/or reducing the length of the gap and not vice versa.
7. Slot welding • Length of slots to be not less than 90mm • Width of slots to be not less than twice the plating thickness (t ) or 15mm, whichever is the greater p • Distance between slots not to exceed 140mm • Slots are to have well rounded ends and smooth, clean and square edges • Slots are to be continuously fillet welded all around and are not to be filled with welding
8. Double continuous welding • Double continuous welding is required in the following areas: a) Boundaries of weathertight decks and erections, including companionways, hatch coamings etc. b) Boundaries of watertight and oiltight compartments c) Engine bed structure (deep/full penetration in way of main engine seatings as required) d) Bottom framing structure in way of machinery space e) Shell structure in the impact area Bottom shell throughout / Side shell fwd Fr19 f) Structure in way of areas subject to high stresses (thrusters, bilge keels, foundations etc.)
9. Single sided welding • Full penetration welding is required for all single-sided welding. Welding process and consumables to be approved for one-side welding or alternative means of obtaining full penetration welds to be to Surveyors satisfaction.

236-01.800.03-D Welding Schedule.xlsx Page 2 of 8

[Seite 3]

PATROL 29 WP HYBRID

WELDING SCHEDULE

KEY FOR SYMBOLS

Weld Type FP Full Penetration Weld DC Double Continuous Fillet Weld CI Chain Intermittent Fillet Weld SI Staggered Intermittent Fillet Weld CONT Continuous Fillet Weld

All Fillet Welds t Base thickness (generally thickness of thinner member being joined) p a Design throat thickness (minimum) l Design leg length (= √2 x a)

Intermittent Welding s Minimum length of correctly proportioned weld fillet, clear of end craters l Maximum gap between successive weld fillets (lesser of 2 x s or 150mm) gap d Weld fillet spacing (start to start)

Figure 1. Weld Details

236-01.800.03-D Welding Schedule.xlsx Page 3 of 8

[Seite 4]

PATROL 29 WP HYBRID

WELDING SCHEDULE

Figure 2. Primary member to extruded panel intermittent welding

Figure 3. Deck girder intermittent welding

Figure 4. Extent of bottom girder full penetration welding (Port & Starboard)

236-01.800.03-D Welding Schedule.xlsx Page 4 of 8

[Seite 5]

PATROL 29 WP HYBRID

WELDING SCHEDULE

ITEM 1 t ITEM 2 t TYPE s l d a l 1 2 gap

SHELL PLATING

SHELL STIFFENING

236-01.800.03-D Welding Schedule.xlsx Page 5 of 8

[Seite 6]

PATROL 29 WP HYBRID

WELDING SCHEDULE

ITEM 1 t ITEM 2 t TYPE s l d a l 1 2 gap

BOTTOM STRUCTURE

** FULL PENETRATION IN WAY OF ENGINE & GEARBOX SEATINGS SEE FIG. 4 FOR EXTENT

236-01.800.03-D Welding Schedule.xlsx Page 6 of 8

[Seite 7]

PATROL 29 WP HYBRID

WELDING SCHEDULE

ITEM 1 t ITEM 2 t TYPE s l d a l 1 2 gap

WEB FRAMES & ICE STRINGERS

BULKHEADS

• SEE FIG. 2 FOR WELDING ARRANGEMENT

236-01.800.03-D Welding Schedule.xlsx Page 7 of 8

[Seite 8]

PATROL 29 WP HYBRID

WELDING SCHEDULE

ITEM 1 t ITEM 2 t TYPE s l d a l 1 2 gap

DECK & COACHROOF

• SEE FIG. 2 FOR WELDING ARRANGEMENT ** SEE FIG. 3 FOR WELDING ARRANGEMENT

WHEELHOUSE

• SEE FIG. 2 FOR WELDING ARRANGEMENT ** SEE FIG. 3 FOR WELDING ARRANGEMENT

236-01.800.03-D Welding Schedule.xlsx Page 8 of 8