Bolted Marine Side Scuttle with Storm Cover | ISO 1751 Type B Medium Series

Product Overview

The bolted marine side scuttle with storm cover is an opening, medium-type Type B side scuttle for installation in a vessel shell plate or bulkhead. It belongs to regular series N and is intended for non-fire-rated construction. The main frame is secured to the ship structure by mounting bolts, while the opening glassholder and metal deadlight, also called a storm cover, use a common hinge arrangement. Swing bolts and nuts provide the closing force for the glassholder and deadlight.

In normal service, the glazed opening provides daylight and external visibility. When the deadlight is closed and correctly seated against its gasket, it provides an additional protective closure for weather exposure, sea impact, damage-control conditions, or operating procedures defined by the vessel. Correct selection depends not only on nominal diameter, but also on installation position, design pressure, shell or bulkhead thickness, wall opening, bolt pattern, glass and gasket specification, opening direction, material compatibility, test scope, and classification approval.

Quick Specifications

• Configuration: regular series N, Type B medium type, opening model, bolted mounting, with deadlight / storm cover → suitable where the ship design requires a removable bolted frame rather than a welded seat.
• Nominal diameter: 200 / 250 / 300 / 350 / 400 / 450 mm → size selection must match the clear opening, approved arrangement drawing, installation position, and design pressure.
• Wall opening reference: 253 to 513 mm → the shipyard should verify cut-out diameter, mounting-bolt circle, edge distance, local reinforcement, and access for tightening before fabrication.
• Closing arrangement: common hinges with swing-bolt and nut fasteners → glassholder and deadlight seating should be checked for uniform gasket compression and free opening without excessive looseness or binding.
• Safety glazing: thermally toughened marine safety glass is the ISO 1751 basis → pane type, thickness, marking, strength test, and replacement interchangeability remain subject to the selected standard and approved drawing.
• Inspection and test: material review, dimensional and visual inspection, opening/closing test, and hydrostatic or hose testing may be required → exact pressure, holding time, witness level, and acceptance criteria must be confirmed.
• Material options stated for supply: mild steel, cast steel, stainless steel, aluminium, copper alloy, or bronze → exact grades, component combinations, corrosion compatibility, and low-temperature requirements are to be confirmed.
• Fire rating: this page covers non-fire-rated N-series construction → A- or B-class fire-resistant side scuttles require a separate approved design and testing basis, such as ISO 5797, and must not be treated as a simple material option.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm the governing standard and designation: ISO 1751:2012 regular series N, Type B medium type, opening bolted model with deadlight; state left-hand or right-hand opening and mark the viewing direction on the drawing.

Step 2: Select nominal diameter and provide the required clear opening, wall opening, shell or bulkhead thickness, mounting-bolt circle, bolt-hole diameter, frame depth, available hinge clearance, and maintenance access.

Step 3: Provide the exact installation position: vessel type, deck or compartment, distance above the assigned load line, exposure to sea or weather, internal or external opening direction, and applicable design pressure or class rule.

Step 4: Confirm the complete material system: main frame, glassholder, deadlight, hinges, swing bolts, mounting bolts, glass retaining parts, gasket, and finish. Mixed materials require a corrosion and galvanic-compatibility review.

Step 5: Confirm the safety-glass standard, pane thickness, gasket specification, hydrostatic / hose test pressure and holding time, mechanical-strength requirement, marking, material traceability, class witnessing, and certificate scope.

Step 6: Provide quantity, approved or reference drawing, replacement photos if applicable, required delivery time, packing requirement, delivery destination, and the classification society involved in the vessel project.

Structure

Bolted main frame | Opening glassholder | Thermally toughened safety glass | Glass retaining frame | Common hinge arrangement | Metal deadlight / storm cover | Swing-bolt and nut fasteners | Sealing gaskets | Mounting bolts

Watertightness, Installation and Quality Advantages

• The bolted frame allows removal and replacement without cutting a welded seat, which is useful for repair and retrofit work. The seating face must be flat, adequately supported, and sealed according to the approved installation detail.
• The common hinge arrangement keeps the glassholder and deadlight attached to the main frame and supports a compact opening sequence. Hinge alignment and clearances should be controlled so both parts open freely and return squarely to the seat.
• Swing bolts provide distributed closure around the circular frame. Uniform tightening is important because excessive local preload can distort the frame or produce uneven gasket compression, while insufficient preload can reduce tightness.
• Separate gasket interfaces between the main frame, glassholder, and deadlight are critical to sealing performance. Gasket material, section, joint condition, compression, ageing resistance, and replacement availability should be confirmed.
• The shell or bulkhead opening, bolted flange, mounting bolts, backing arrangement, and surrounding reinforcement form one pressure load path. Product approval does not replace shipyard verification of the local hull structure.
• Material and finish should be selected as a complete corrosion-control system. Carbon-steel parts may be painted or galvanized where suitable; stainless-steel or copper-alloy parts require compatible fasteners and isolation from dissimilar metals.
• Inspection should cover material certificates, dimensions, glass and gasket identification, casting or fabrication quality, fastener operation, opening direction, closing contact, surface finish, and the approved pressure / leakage test.

Custom Attributes

• Standard: ISO 1751:2012 → current international reference for classification, interchangeable dimensions, construction, materials, tests, marking, and designation of framed ship side scuttles.
• Alternative Standard: GB/T 14413-2008 → use only when specifically required by the project; its designation and details should be checked separately rather than assumed identical to ISO 1751:2012.
• Series and Type: N series, Type B medium type → the letter B describes the mechanical side-scuttle type, not a B-class fire rating.
• Model: Opening, bolted, with deadlight → opening hand, hinge position, and viewing direction are project-selection items.
• Nominal Size: 200 to 450 mm → confirm clear opening, wall cut-out, bolt circle, frame dimensions, glass size, and installation space.
• Material: Mild steel / cast steel / stainless steel / aluminium / copper alloy / bronze → exact grade and component combination to be confirmed.
• Surface Treatment: Painted / polished / galvanized as applicable → final system depends on base material, vessel coating specification, and corrosion compatibility.
• Test and Certification: Available according to project requirement → pressure, leakage, mechanical, material, and class-witness scope must be agreed before quotation.

How It Works

Open the swing-bolt fasteners → Swing the deadlight and glassholder clear on their hinges → Use the glazed opening for daylight and visibility → Return the glassholder squarely onto its gasket and tighten evenly → Close and secure the deadlight when additional protective closure is required → Inspect gasket contact and locking condition

Applications

Ocean-going cargo vessels | Inland-waterway vessels | Workboats and service vessels | Naval or government vessels subject to project approval | Accommodation and service-space side openings | Newbuilding, conversion, and replacement projects

Certifications & Advantages

Material certificates, maker documentation, inspection reports, and classification certificates can be arranged according to project requirement, approved drawings, testing scope, and the relevant class approval procedure. Availability and witness scope must be confirmed before quotation and are not implied as standard delivery for every order.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

Drawing & Photos

FAQ

Q1: Is ISO 1751 Type B the same as a B-class fire-resistant side scuttle?

A1: No. Type B in this page means the medium mechanical type within the ISO 1751 side-scuttle classification. A B-class fire-resistant side scuttle is a separate fire-tested assembly for a B-class division and requires an approved standard such as ISO 5797.

Q2: Can the same bolted side scuttle be installed at any position on the ship side?

A2: No. Permitted position and required strength depend on the vessel, deck level, height above load line, exposure, design pressure, opening direction, and applicable statutory or class rules. ISO 5780 and the approved vessel arrangement should be checked.

Q3: What information is required for a replacement side scuttle?

A3: Provide nominal diameter, clear opening, wall cut-out, D1-D5 dimensions, frame depth, mounting-bolt circle and hole size, bolt quantity, hinge and opening hand, glass and gasket details, material, finish, class requirement, and clear photos or an existing drawing.