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Materials Q&A

Do I need to be concerned about galvanic corrosion when selecting valve materials?

materials q and a 300x300A: This is a good question, and the answer should begin with discussing exactly what is meant by galvanic corrosion.

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Have PMI testing limitations changed with the advances in technology?

materials q and a 300x300A: The short answer is that the situation has changed in some ways, but that PMI still has limitations. The long answer is a bit more complicated. First, let’s clarify what is meant by the term PMI (which stands for positive material identification).

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Titanium Valve Grades

materials q and a 300x300Q: Why are cast titanium valves commonly offered in grades different than my wrought pipe?

 

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Nickel-Copper Alloys

materials_q_and_a_graphicQ: Are the nickel-copper alloys (such as UNS N04400) acceptable for use in accordance with the NACE sour service standards?

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NACE MR0103 Material Compliance

materials_q_and_a_graphicQ: I have a material certified to be compliant with NACE MR0175. Is that material also compliant with NACE MR0103?

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Valve Magazine Digital Edition

14 SUM CVR 160x214Inside the Summer 2014 issue…

• Attracting Talent
• Advances in Machining
• Severe Service in Power Plants
• SIS Tests and Standards

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