Erosion Resistant Steel
Erosion Resistant Steel
(OP)
I will appreciate to know the comparitive resistivity of steel by erosion, A 106, Grade B, API 5L Gr X42, X52, Stainless Steel 304, 316 and Duplex.
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RE: Erosion Resistant Steel
Is there any corrosion to consider?
Is this related to abrasion of flow?
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RE: Erosion Resistant Steel
RE: Erosion Resistant Steel
Could sand be filtered out of the system?
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RE: Erosion Resistant Steel
In this standard there is no big difference beetween the materials you've mentioned regarding the pure "erosion" damage mechanisms.
If u have also to consider erosion-corrosion then you can have other problems.
I've found in this day for my job a NACE Paper that maybe can be useful to you: NACE paper n 06594 “Erosion Corrosion and Synergistic Effects in Disturbed Liquid-Particle Flow” S. Nesic. You can downloaded from the NACE website.
Hope this help
REgards
Vitt
http://xoomer.alice.it/corrosion
http://corrosionist.blogspot.com
RE: Erosion Resistant Steel
A higher strength steel will have better erosion resistance than lower strength, but there is so little work hardening that in most cases a SS will preform better. Even though they start out 'soft' the 300 stainless grades will develop a high surface hardness quickly.
The duplex SS grades start out very strong. I have seen data on slurry abrasion, cavitation and wet steam impingement that all show duplex SS grades superior to everything except Co based alloys.
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Rust never sleeps
Neither should your protection
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RE: Erosion Resistant Steel
In simple terms there are two factors that increase the erosion resistively, a) metal hardness b) density of metal particles in the alloy. Since both of these factors increases in the materials sequenced in my first post therefore the erosion resistively increases accordingly.
RE: Erosion Resistant Steel
To be honest, virtually every case also involves corrosion. Even simple cases of wet sand or hot air corrosion is a factor. In this situation the higher corrosion resistance of SS give it a significant advantage.
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Rust never sleeps
Neither should your protection
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RE: Erosion Resistant Steel
RE: Erosion Resistant Steel
I don't think that going to a higher strength steel will get you much improvement. It will help, but you really need to put more effort into design trying to eliminate turbulence and impingement.
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Rust never sleeps
Neither should your protection
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RE: Erosion Resistant Steel
RE: Erosion Resistant Steel
1) Be sure that corrosion is not an issue.
2) If you're talking about pure erosion than you can extimate the amount of erosion with the DNV model or other erosion model like "Tulsa" and calcultate the diameter of pipe to avoid erosion.
Erosion is a function also of sand particle size, and other factors like the angle of impact, is not so simply to predict it.
3) If you want to go to Stainless Steel,or other type of CRA (corrosion resistant alloys), you need to take care also to Sour Service, you've not mentioned it, but in case you can have severe limitations in the use of SS and CRA.
hope this help
regards
Vitt
http://xoomer.alice.it/corrosion
http://corrosionist.blogspot.com