HATCH HYDRAULIC PIPES.
Equipment Type
Piping Systems
Location
Deck Midship
AI Analysis Results
Overall Condition
Poor
Equipment Identified
Unidentified vertical steel service line bundle passing through a deck/floor penetration (4 larger-diameter green-painted pipes/tubes and 2 smaller-diameter tubes/rods visible); welded flat-bar primary pipe support/spacer bracket with ring collars/clamps around the larger pipes; small secondary wall-mounted pipe clips/supports on the thin tube; steel penetration sleeve/coaming/guide collar at the deck opening; surrounding welded steel trunk/bulkhead/stiffener structure; partially visible corroded steel fitting/block at lower left, unidentifiable from the photographs
Analysis Summary
The photographs show a bundle of fixed steel service pipes/tubes routed vertically through a deck penetration inside a recessed steel trunk, restrained by a welded flat-bar support bracket and smaller secondary clips. The most critical finding is severe corrosion wastage of the primary cross-support bracket located immediately above the penetration sleeve, especially at the left-hand cantilevered end and around the clamp attachment points, where local perforation and major section loss are visible. If this condition is left unaddressed, the line bundle can lose effective restraint and begin moving under ship vibration or operational loading, creating chafe at the penetration, fatigue at welded collars, and possible damage or leakage of the routed services. Intervention is urgent: the wasted support should be temporarily secured and then renewed at the earliest repair opportunity, preferably before departure from the present port, with simultaneous close-up inspection and recoating of the pipes, clips and penetration collar.
Defects Found (2)
The welded flat-bar cross-support spanning the pipe bundle immediately above the deck penetration is heavily corroded, with the left/free end deeply exfoliated and locally split through. Visible section loss is estimated at approximately 60-80% along a length of about 90-120 mm, with irregular perforations/open edges up to roughly 20-35 mm and heavy rust scale at the collar weld toes; the right-hand support ear/tab is also heavily pitted. The condition is consistent with long-term coating failure combined with moisture retention and crevice corrosion around the collars and on horizontal surfaces. If left untreated, the bracket will continue to lose stiffness and load-carrying capacity until it no longer restrains the line bundle, allowing vibration, misalignment and secondary damage to the pipes/tubes at the penetration and clamp points.
Multiple visible pipes/tubes, clip bodies and the penetration guide/coaming show broken topcoat with pink undercoat/primer exposed over an estimated 20-30% of the visible surface area. Rust staining is concentrated at the clamp contact points, around the small wall clips, and along the upper/right lip of the penetration collar, indicating underfilm corrosion and localized attack where the coating has failed. This pattern is typical of age-related paint embrittlement, repeated wetting and poor access for coating maintenance inside a recessed trunk. If not cleaned and recoated, corrosion will progress beneath the remaining coating and may start producing measurable external wall loss at currently hidden contact areas under the clamps and at the sleeve edge.
Recommendations
Install temporary mechanical restraint to the pipe bundle to prevent movement, then isolate/protect adjacent lines and crop out the wasted primary flat-bar support and affected end lugs. Fabricate and weld a new support from steel of equal or greater scantling after confirming original dimensions by measurement/gauging, reinstate proper spacing using correctly sized split clamps or saddle clips, and verify clearance so no line bears hard against the penetration sleeve. After steel renewal, prepare surfaces to ISO 8501-1 Sa 2½ where blasting is possible, or minimum St 3 by power tool in restricted areas, then apply one zinc-rich epoxy primer coat and two high-build epoxy coats to an ISO 12944 C5-M service environment, minimum total DFT 200 microns.
After removal of loose coating and rust, open up and clean all accessible clamp contact areas, pipe exteriors, secondary clips and penetration coaming by needle-gunning/power tooling to minimum St 3. Measure pipe outside diameter and/or local wall thickness at corroded clamp zones and renew any clip or collar showing measurable wastage, then stripe-coat weld toes, clamp interfaces and penetration edges before full recoating with a high-build epoxy maintenance system compatible with the vessel’s approved paint schedule.