Calculators
Piping Material Class Reference
Quick-reference table of typical refinery and petrochemical piping material classes. Filter by class code, base material, service, or pressure rating. Always confirm against your plant’s master piping specification before use.
Source: distilled from typical refinery/petrochemical piping material class summaries; these are common convention and not a substitute for project-specific material selection. Always verify corrosion allowance, PWHT requirements, impact testing, and NACE compliance against the actual plant piping specification before procurement.
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Disclaimer. This material is provided for informational and educational purposes only and does not constitute professional engineering advice. Calculations, reference data, and methodologies are based on published standards and accepted engineering practice but are not a substitute for engineering judgment, site-specific analysis, or review by a licensed Professional Engineer. Inflection Point Engineering, LLC makes no warranties, express or implied, regarding the accuracy, completeness, or fitness for a particular purpose of any content presented here, and shall not be liable for any direct, indirect, incidental, or consequential damages arising from its use. Users assume all risk associated with applying this content to real-world design, operations, or decisions.
© 2026 Inflection Point Engineering, LLC. All rights reserved.