Closure products

Tube Turns Division of Sypris Technologies Inc. manufactures a family of closures in sizes ranging from 2” to 72”. Our closures are manufactured from a wide variety of ASME approved materials including Carbon Steel, Stainless Steel (304, 304L, 316, 316L, Duplex and Super Duplex), Monel®, Inconel®, Hastelloy® and other exotic materials as specified by our customers. Tube Turns designs and manufactures a complete line of closures to international standards, including ASME Section VIII Division I and Division II, PD 5500 / BS EN 13445, with termination specifications to meet ASME B31.3, B31.4, B31.8 and many others. All closures can be designed for either horizontal or vertical application and can be equipped with such accessories as sight glasses, nozzles, drains, gauges, sampling ports, open/close automation, and safety interlocks. Connection types including full and reduced access as well as mitred designs for inclined or declined vessels are available. Sypris Technologies, Tube Turn Division offers the most diverse and complete closure product portfolio in the world.

T-Bolt Style Closures


Tube Turns T-Bolt Closures are designed for nominal pressure applications. T-Bolt closures are available for horizontal and vertical applications. Safety plus operating advantages and weight savings over flanged manways make our T-Bolt Closures ideal for applications such as storage tanks, mixing equipment, filters, separators, inspection ports, tower access, reactor access and hand holes on processing equipment. T-bolts can be supplied in specialty applications such as sanitary equipment, medical waste and hyperbaric chambers. Size Range 6” – 66” Pressures up to 500PSI

T-bolt quick opening closures →

Threaded Quick Opening Closures (QOC)


Design is simple yet robust. Heavy duty davit assembly is furnished for effective alignment of head and hub. Components are manufactured utilizing precision CNC machining to provide accurate and consistent dimensions. Threaded closures are economically priced with attractive lead times to meet the most demanding customer requirements. Size Range 2” – 24” pressures ANSI 150 - ANSI 900 Size Range 26” – 36” pressure ANSI 150 - ANSI 600.

Threaded quick opening closures →

Yoke Style Quick Opening Closures (QOC)


Tube Turns Double and Single Yoke Style Closures are widely accepted throughout the world for applications where frequent access is required or where the blind flanges are cumbersome and time consuming. Yoke Style Closures can be equipped with operating aids to simplify operation and speed up opening and closing. Devices such as breakover wrenches and chain and sprocket drives are available Size range 2” – 72” Pressure range ANSI 150 - 2500

Yoke style quick opening closures →

Tool-less® Quick Opening Closures (QOC)


Tool-less® closures are high pressure quick opening closures (QOC) supplied in the vertical or horizontal configuration. The Tool-less® is designed to be opened and closed by one person in one minute without the use of additional tools. Tool-less® closures are suitable for use on natural gas filter separators where filter element replacement requires frequent vessel access. Horizontal Tool-less® closures include double-pivot heavy duty hinge while the vertical closures can be furnished with a robust davit to raise the door once unlocked. Size Ranges 8” – 72” Pressure range ANSI 150 – ANSI 2500.

Tool-less® quick opening closures →

Typical quick opening closure applications