NACE MR0103 and Duplex Stainless Steels
Q: Why are some suppliers reluctant to produce duplex stainless-steel valves that are compliant with NACE MR0103?
#materials
Industry, Government Strike Back at Metal Thieves
The theft of valves for their scrap metal value that began several years ago continues, although law enforcement, legislatures and industry associations are increasingly recognizing the seriousness of the problem.
#VMAnews #materials
Indices that Measure Water Scaling
Q: Why do my carbon steel valves and piping corrode when the Langlier index says they shouldn’t?
#materials #water-wastewater
The A to Z of Valve Materials
If you walk through any large PVF warehouse and look around, it seems that valves come in three flavors: black, silver and gold.
#basics #materials
Conversion of Hardness
Q: Are there any issues regarding conversion of hardness from one method or scale to another?
#materials
Portable Hardness Testers and NACE Sour Service Standards
Q: Are portable hardness testers adequate for verifying the hardness of parts for compliance to industry standards such as the NACE sour service standards?
#materials #standards #maintenance-repair
Less Expensive Stainless Steels
Q: High metal prices, especially for nickel and molybdenum, have our procurement people looking at less expensive stainless steels like the 200 series.
#materials
Checking Metal Materials With a Magnet
Q: I’ve seen people checking metal materials with a magnet.
#materials
Supplemental Requirement S23 in ASTM A703
Q: A customer has asked whether we can supply carbon and alloy steel valve bodies meeting Supplemental Requirement S23 in ASTM A703.
#materials
Cobalt-based Alloy 6 Materials and Boiler Feedwater Service
Q: I’ve heard that cobalt-base Alloy 6 materials should not be used in boiler feedwater service.
#materials #maintenance-repair
Austenitic Stainless Steels
Q: Do austenitic stainless steels require impact testing when used in low-temperature applications?
#materials
WCC and LCC Casting in ASME B16.34
Q: Why do WCC and LCC castings have different maximum allowable temperatures in ASME B16.34?
#materials #standards
Multi-colored Stain on Valves
Q: I am handling high purity-water and keep getting a multi-colored stain on my valves and other equipment.
#water-wastewater #materials #automation
NACE MR0175/ISO 15156
Q: I see that there is a new version of NACE MR0175 called NACE MR0175/ISO 15156.
#materials
Specifying Valves for Hydrogen Service
Q: When specifying valves for hydrogen service, what are some of the material considerations I should keep in mind?
#materials #maintenance-repair
ASTM A890
Q: Our piping specification requires that duplex stainless-steel castings be supplied per ASTM A890.
#materials
PMI Analysis
Q: Why does the valve supplier refuse to accept my claim that its material is out of specification based on my PMI analysis?
#materials
New NACE Standard MR0103
Q: I've seen references to a new NACE standard, MR0103.
#standards #materials
NACE MR0175
Q: I've heard there are major changes to the 2003 revision of NACE MR0175.
#materials