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HDWT SQUARE & OVAL REFERENCES

Cast-Aluminium Watertight Marine Hatch Arrangements

Compare HDWT square and HDWT46OVL oval cast-aluminium watertight hatch families and operating variants.

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WhatsApp Cast-Aluminium Watertight Marine Hatches Enquiry

Selection boundary: Final size, material, hardware, opening arrangement, rating and applicable documentation are confirmed in ERBA Marine’s written quotation.

Bofor HDWT cast aluminium watertight hatch official Bofor reference
Official Bofor reference image for Bofor HDWT cast aluminium watertight hatch. Final size, material, hardware, opening arrangement and applicable documentation are confirmed in writing for the supplied configuration.

Bofor HDWT cast aluminium watertight hatch

Official manufacturer reference image hosted locally by ERBA Marine. The supplied configuration is confirmed in writing.

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HDWT50 — 500 × 500 mm published clear opening

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HDWT56 — 500 × 600 mm published clear opening

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HDWT60 — 600 × 600 mm published clear opening

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HDWT75 — 750 × 750 mm published clear opening

Bofor marine doors and hatches logo official Bofor reference

Bofor marine closures, selected and supplied through ERBA Marine

ERBA Marine coordinates technical selection and supply for the agreed marine-door, hatch, custom-closure or component configuration. Included drawings, documents, delivery scope, service support and applicable warranty route are stated in ERBA Marine’s written quotation.

Identity and approval boundary: Bofor is the manufacturer of the referenced products. Approval is never inferred across the range. Classification, fire rating, pressure head, approved dimensions and installation conditions apply only to the exact model and current certificate scope.

SELECTION BEFORE SPECIFICATION

How to approach cast-aluminium watertight marine hatches

Published families and images help identify a starting point; verified vessel and closure data determine the final selection.

Cast-Aluminium Watertight Marine Hatches

The published HDWT square references identify clear openings of 500 × 500 mm for HDWT50, 500 × 600 mm for HDWT56, 600 × 600 mm for HDWT60 and 750 × 750 mm for HDWT75. The HDWT46OVL oval reference publishes a 400 × 600 mm clear opening and 500 × 700 mm cut-out.

Family suffixes cover basic, teak, handwheel, 180-degree, low-profile, glazed, centre-mechanism, proud-frame and related configurations. Do not generalize a pressure rating, certificate or installation condition across all sizes or suffixes; confirm the exact current model and document.

Information to confirm

  • Square or oval structural opening
  • Clear opening versus cut-out dimension
  • Deck material and welding procedure
  • Teak, glazing, handwheel or low-profile requirement
  • Opening angle and mechanism clearance
  • Exact current documentation and project acceptance
PUBLISHED FAMILY REFERENCES

Cast-Aluminium Watertight Marine Hatches families and model-code groups

Compare the published family descriptions below, then send the exact project data for confirmation.

Square HDWT Sizes

HDWT50 · HDWT56 · HDWT60 · HDWT75

Published clear-opening references; verify exact cut-out and installation data.

Square Variants

HDWTxx · TK · TH · TH180 · THLO · G · THCM · THPR · THCCM

Cover, handle, glazing, teak and mechanism-related suffix references.

Oval Family

HDWT46OVL · OV · TH · TH180 · THLO

Published oval clear-opening and cut-out reference with operating variants.

Configuration rule: Do not transfer a material, size, dog, handle, glazing, pressure, fire-rating or approval statement from one model code to another. ERBA Marine confirms the exact selected configuration in writing.

CONTROLLED LOCAL DOCUMENTS

Cast-Aluminium Watertight Marine Hatches technical references

These locally hosted files support preliminary review. Current revision, validity, exact model scope and project acceptance must be confirmed before use.

Technical Reference

Bofor HD-series cast hatch welding procedure - revision 2

Bofor HD-series cast hatch welding procedure – revision 2. Reference only: ERBA Marine must confirm the current revision, validity, model/configuration scope and acceptance requirements in writing before quotation or supply.

  • Reference only for preliminary coordination
  • Current revision and exact model scope must be confirmed
  • Do not use as fabrication or class authority without acceptance
Open Local PDF Reference
TECHNICAL SELECTION DATA

What ERBA Marine needs before confirming a closure

Verified dimensions, location, construction, operation, hardware and documentation reduce avoidable clarification.

Vessel, opening and installation

  • Square or oval structural opening
  • Clear opening versus cut-out dimension
  • Deck material and welding procedure

Configuration, documents and delivery

  • Teak, glazing, handwheel or low-profile requirement
  • Opening angle and mechanism clearance
  • Exact current documentation and project acceptance

Important: Classification, fire rating, pressure head, approved dimensions and installation conditions apply only to the exact model and certificate. ERBA Marine confirms current documentation and the selected configuration in writing before supply.

CLEAR PROJECT ROUTE

From closure requirement to confirmed supply

A reference image or family code is never treated as the final fit until the vessel and exact configuration are reviewed.

1. Share the requirement

Send vessel, opening, location, duty, construction, hardware and document requirements.

2. Match the family

ERBA Marine identifies the closest current marine-door, hatch, closure or component reference.

3. Confirm the configuration

Exact size, material, operation, finish, rating, documents and supply scope are checked.

4. Quote and coordinate

ERBA Marine states delivery, included support and applicable warranty route in writing.

FREQUENTLY ASKED QUESTIONS

Cast-Aluminium Watertight Marine Hatches FAQs

Practical answers for family comparison, selection, documentation, installation and quotation.

HDWT50 is 500 × 500 mm, HDWT56 is 500 × 600 mm, HDWT60 is 600 × 600 mm and HDWT75 is 750 × 750 mm. Confirm the corresponding cut-out and current drawing before fabrication.

The supplier reference publishes a 400 × 600 mm clear opening and a 500 × 700 mm cut-out. Confirm orientation, frame, deck structure and exact variant.

No. Approval, pressure head, size and installation limits apply only to the exact documented configuration. Historical CRS material is not published as current evidence.

A cast-hatch welding procedure revision 2 is available as a reference. Confirm the current revision, base material, welding procedure qualification and project acceptance before use.

Only as an initial reference. Confirm the current revision, validity, exact model, dimensions, materials, construction, installation conditions and project-acceptance requirements in writing before fabrication, installation or submission.

Send the cast-aluminium watertight marine hatches requirement

Accurate opening, vessel, location and duty data helps ERBA Marine compare the current family, configuration and documents and prepare a useful quotation.

  • State the clear opening and structural cut-out.
  • Describe location, exposure and required closure duty.
  • Confirm material, opening direction, glazing and hardware.
  • Attach drawings, existing photographs and document requirements.
WhatsApp Cast-Aluminium Watertight Marine Hatches Enquiry

Cast-Aluminium Watertight Marine Hatches Technical Enquiry

Fields marked * are required. Opening dimensions, installation photographs and drawings are strongly recommended.

Your technical and contact information is sent only to ERBA Marine’s website enquiry recipients for follow-up.