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Charpy Toughness Modules

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CALCULATOR MODULE : ASME B31.3 Process Piping Minimum Temperature For Impact Testing   ±

Calculate ASME B31.3 process piping minimum temperature for impact testing from wall thickness and material type.

For carbon steel materials with a minimum temperature letter designation, the minimum temperature for testing can be calculated according to table 323.2.2A (curves A, B, C and D).

If the maximum stress is less than the design stress, the impact testing temperature can be reduced according to figure 323.2.2B using the stress ratio. The stress ratio is the maximum of hoop stress over design stress, combined stress over design stress, or operating pressure over pressure rating for pressure rated components. The reduction in impact testing temperature from stress ratio is valid for minimum temperatures listed in table A-1, and for minimum temnperatures calculated from a letter designation (curves A, B, C or D). Use the workbook ASME B31.3 data tables to look up minimum temperature and letter designation data.

Reference : ANSI/ASME B31.3 : Process Piping (2018)

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CALCULATOR MODULE : ASME B31.8 Gas Pipeline Charpy Toughness   ±
CALCULATOR MODULE : ASME B31.5 Refrigeration Piping Minimum Temperature For Impact Testing   ±

Calculate ASME B31.5 refrigeration piping minimum temperature for impact testing from wall thickness and material type.

For carbon steel materials with a minimum temperature letter designation, the minimum temperature for testing can be calculated according to table 523.2.2 (curves A, B and C).

If the maximum stress is less than the design stress, the impact testing temperature can be reduced according to figure 523.2.2 using the stress ratio (the ratio of design tensile streess over allowable stress). Use the hoop stress calculator to calculate the hoop tensile stress. Use the flexibility calculators to calculate longitudinal tensile stress. Use the workbook ASME B31.5 data tables to look up minimum temperature and letter designation data.

Reference : ANSI/ASME B31.5 : Refrigeration Piping And Heat Transfer Components (2013)

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CALCULATOR MODULE : AGA NG18 Crack Defect   ±

Calculate AGA NG-18 Level 0 critical defect length and minimum required fracture toughness from flow stress and hoop stress.

The level 0 assessment is useful as a screening check for crack defects. The level 0 check is from AS 2885.1. The temperature derating calculation is from ASME B31.8. Material specific test data should be used if it is available. Use the level 1 assessment for simple defects from defect length and depth. Use the level 2 assessment for complex defects from the defect river bottom profile. Refer to the module list below.

AGA NG-18 is suitable for crack defects. For blunt defects including corrosion, mechanical damage and grinding repairs etc the ASME B31G or RSTRENG calculators are recommended.

Reference : AGA Pipeline Research Committee NG-18 Report 204 Ductile Fracture Properties of Selected Linepipe Steels

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CALCULATOR MODULE : AS 2885.1 Pipeline Fracture Toughness   ±

Calculate AS 2885.1 pipeline critical defect length and fracture toughness.

The critical defect length is calculated from the flow stress and the maximum hoop stress using the Folias factor Mt. The initiation crack length is assumed to be equal to 0.8 - 0.9 of the critical defect length. The required initiation fracture toughness can then be calculated from the initiation defect length. The required CVN is then calculated from the fracture toughness.

Reference : Australian Standard AS 2885.1 : Pipelines - Gas And Liquid Petroleum Part 1 : Design And Construction (2015)

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DATA MODULE : ASME B31.3 Process Piping Minimum Temperature For Impact Testing ( Open In Popup Workbook )   ±
DATA MODULE : ASME B31.5 Refrigeration Piping Minimum Temperature For Impact Testing ( Open In Popup Workbook )   ±
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