Expansion Trunk

Expansion Trunk (UMC-470) are genuine Sinooutput expansion trunks & domes made to fit Sinooutput hatches and doors exactly. Expansion trunks and domes, dished heads, corner plates and engineered specialty hatches. Contact sales for profiles, materials and volume pricing.

• UMC-464-5 Raised Watertight Hatch + UMC-144-5 Ullage welded to the top of the Trunk.
• Tumble Bolts – Bronze
• Dog Handles – Steel
• Gasket – Nitrile

• Other gasket material available upon request.
• Various hardware options available:
• Steel, Stainless Steel, & Bronze Dog Handles (available with or without grease fittings).
• Bronze & Stainless Steel Tumble Bolts.
• Lug Bolts and nuts made from dissimilar metals to prevent galling and corrosion.
• Flame screens available upon request (sold separately).

Expansion trunks are typically found on tank barges. They are commonly used to access cargo compartments for venting, filling, and inspecting.

• Steel (ASTM A36)
• Painted Primer Grey