Projectmaterials

Category: Various Technical Topics

gas explosion e1548871838164
Miscellaneous Technical

LEL and UEL Explained (Explosive Gas)

The lower explosive limit (LEL) is the minimum concentration of a specific combustible gas required to fire combustion when in contact with oxygen (air). If the concentration of the gas is below the LEL value, the mix between the gas itself and the air is too weak to spark. The upper explosive limit (UEL) is the maximum level of concentration of the gas that will burn when mixed with oxygen; when

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piping products e1548871937336
Miscellaneous Technical

Piping Materials Match Chart (ASTM)

The piping material chart shows the matching ASTM materials for pipes, valves, fittings, flanges and stud bolts. PIPING MATERIALS MATCH CHART The piping ASTM materials match chart shows, for example, that an A106 Gr. A pipe matches with ASTM A234 buttweld fitting, with an ASTM A105 forged fitting, flange or valve, with an A216 WCB cast valve and with ASTM A193 B7 stud bolts. The same logic applies to any other

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valve pressure e1548870317996
Miscellaneous Technical

ASME B16.34 Pressure/Temperature Rating

The ASME B16.34 specification covers pressure and temperature ratings for forgings, castings, plate, bar, and tubular products. The ASME B16.34 charts show the max allowed pressure for a material depending on the product rating and the process temperature (the higher the temperature, the lower the pressure at a given rating).    GROUP 1: CARBON AND ALLOY STEEL GRADES Material Group No. Material Nominal Designation Forging Casting Plate Bar Tubular 1.1 C

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PID e1548872016183
Miscellaneous Technical

Engineering Terms and Abbreviations

The engineering dictionary collects the most used terms, abbreviations, and definitions used in technical and commercial documentation related to project plant construction, materials and project management. A AGA American Gas Association AISI: American Iron & Steel Institute ANSI: American National Standards Institute — Formerly ASA API American Petroleum Institute ASA: American Standard Institute — Now known as ANSI ASM American Society for Metals ASME:  American Society of Mechanical Engineers ASTM American Society for Testing Materials

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