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Fittings, Materials and Tubing Guide


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Fittings, Materials and Tubing Guide - 1

Fittings, Materials and Tubing Guide Instrumentation Products

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Fittings, Materials and Tubing Guide - 2

Parker Grade Tube A-LOK®/CPI™ Fittings Assembly and Re-make instructions Instrument Pipe and ISO Fittings Phastite® Fittings MPI™ Fittings Tube Fabricating Equipment Complementary Products

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Fittings, Materials and Tubing Guide - 3

What is Corrosion? According to NACE, Corrosion is the deterioration of a substance, usually a metal, or its properties because of a reaction with its environment. The Problem of Corrosion Direct and indirect economic losses derived from corrosion include the following: • • • • • Replacement of damaged equipment Overdesign to allow for corrosion Preventive maintenance Shutdown due to corrosion failure L oss or contamination of the product being produced (i.e. food industry) • fficiency decrease. For example, corrosion E products lower the heat transfer rate in heat exchangers • Failure of...

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Fittings, Materials and Tubing Guide - 4

Using the right materials and processes can help to beat corrosion problems throughout the industries we serve. Uniform Corrosion Uniform or general corrosion is the most classical form of corrosion, but is not always the most important in terms of cost or safety. The consequences of uniform corrosion are a decrease in metal thickness per unit time or a more Galvanic Corrosion Galvanic corrosion can be defined simply as being the effect resulting from the contact between two different materials in a conducting corrosive environment. In many cases, galvanic corrosion may result in quick...

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Fittings, Materials and Tubing Guide - 5

Crevice corrosion is highly accelerated if chlorine, sulphide or bromide ions are present in the electrolyte solution. Once a crevice is initiated, even the most benign atmospheric environments can become extremely aggressive. Crevice corrosion is considered much more dangerous than uniform corrosion as the corrosion rate can be up to 100 times higher. Crevice corrosion is encountered particularly in alloys which owe their resistance to the stability of a passive film. A classic example is stainless steel in the presence of moderate to high concentrations of chlorine ions. Crevice corrosion...

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Intergranular Corrosion Intergranular corrosion is a form of attack that progresses preferentially along the grain boundaries paths and can cause the catastrophic failure of the equipment, especially in the presence of tensile stress. Under certain conditions, the grain boundaries can undergo marked localized attack while the rest of the material remains unaffected. The alloy disintegrates and loses its mechanical properties. This type of corrosion is due either to the presence of impurities in the boundaries, or to local enrichment or depletion of one or more alloying elements. Many alloys...

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Fittings, Materials and Tubing Guide - 7

Some of the most popular factors that can have a significant influence in terms of corrosion are listed below: • Materials Selection: • Process Parameters: • Environment • Media Chemistry • Mechanical Properties • Temperature • Availability of Design & • Velocity • Test Data • Pressure • Cost • Availability • Maintainability • ompatibility with other components C • Reliability • Appearance Some Figures About Corrosion The industrial importance of localized corrosion problems has been revealed in many reports. The following pie chart summarizes the findings of 363 corrosion failure cases...

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Fittings, Materials and Tubing Guide - 8

The Solution Corrosion control does not just happen. It must be planned. We can help you find the best solution for your application. As the worldwide search for oil and gas, power generation or chemical production is turning to more challenging applications an increasing number of situations are being encountered where corrosive production environments and products are present. Many of these cases often involve significant amounts of hydrogen sulphide, carbon dioxide, brine or hazardous chemicals among others, where their high corrosivity along with the wrong decisions made during the...

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Fittings, Materials and Tubing Guide - 9

Materials Range for Corrosion Control Our experienced credentials in materials selection are the results of years of expertise in successful applications worldwide. Materials Range Parker offers the most extensive range of alloys in the market. The range varies from conventional steels to high nickel alloys and titanium for the most demanding applications. The table below depicts the standard range of materials per product family. Other alloys might be offered on request. A-LOK® Fittings MPITM Fittings CPITM Fittings Phastite® Fittings Flanged Products Carbon Steel Duplex Steel Superduplex...

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Fittings, Materials and Tubing Guide - 10

The following table classifies our materials range in terms of mechanical strength and general corrosion resistance, and aims to be a generic tool and guidance at an early stage of the design. The values given to the specific parameters are not absolute and should be used as a reference only. Each application needs to be evaluated carefully and individually as the rules below might not apply at all times. Improved Corrosion Resistance 6Mo Steel Superduplex Steel Monel 400 Duplex Steel Stainless 316 Carbon Steel Brass Duplex Steel Alloy 825 Brass Superduplex Steel Low Availability...

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Fittings, Materials and Tubing Guide - 11

Think of the equipment replacement cost, depreciation, re-qualification of the new systems, downtime or low production rates, fines or human and environmental loss. Avoid low cost equipment. Investing in a more expensive material today could be a cheaper and troublefree solution in the medium and long term. Parker Hannifin carried out Stress Corrosion Cracking Testing as per ASTM G36 conducted by an independent party and its aim was to determine the time to failure of the 6Mo super austenitic steel (UNS S31254) and the conventional 316/L stainless steel (UNS S31600/03) in exactly the same...

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Fittings, Materials and Tubing Guide - 12

Check List of Design Parameters Here are some basic guidelines based on our extensive knowledge and experience in applications worldwide: • hink about cost effectiveness, T safety and reliability Let us help you select the best solution for your application. Start thinking smarter, faster, cleaner and safer. • A cheap option today usually translates into high cost of ownership tomorrow • Do not mix tube and fitting/ v alve alloys whenever Possible • Use 6Mo for high pitting/ c revice corrosion performance • se Super Duplex for its tensile U strength • Use our range of exotic materials for...

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