Heat exchanger stationary fixed floating Alloy Nickel 200 tubesheet

1. what is a tube sheet (tubesheet) for heat exchanger?

Tubesheets are usually made from a round flat piece of metal with holes drilled for the tube ends in a precise location and pattern relative to one another. Tube sheet materials range as tube materials. Tubes are attached to the tube sheet by pneumatic or hydraulic pressure or by roller expansion. Tube holes can be drilled and reamed and can be machined with one or more grooves. This greatly increases the strength of the tube joint.

The tubesheet is in contact with both fluids and so must have corrosion resistance allowances and have metalurgical and electrochemical properties appropriate for the fluids and velocities. Low carbon steel tube sheets can include a layer of a higher alloy metal bonded to the surface to provide more effective corrosion resistance without the expense of using the solid alloy.

The tube hole pattern or "pitch" varies the distance from one tube to the other and angle of the tubes relative to each other and to the direction of flow. This allows the manipulation of fluid velocities and pressure drop, and provides the maximum amount of turbulance and tube surface contact for effective Heat Transfer.

TYPICAL TUBE SHEET

2. Table for available type of Nickel Alloy tubesheets:

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 Independent inspection service covers following activities.
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4.  Nickel 200 Introduction

Nickel 200 is commercially pure (99.6%) wrought nickel. It has excellent mechanical properties and is highly resistant in myriad corrosive environments. Other useful features include:

• magnetic and magnetostrictive properties
• high thermal and electrical conductivities
• low gas content and low vapor pressure.

It is Nickel 200’s corrosion resistance that makes it particularly useful for maintaining product purity in the handling of:

• foods
• synthetic fibers
• caustic alkalies
• structural applications where resistance to corrosion is a prime consideration.

Other applications include:

• chemical shipping drums
• electrical and electronic parts
• aerospace and missile components
• rocket motor cases.