Month: February 2019

Magnetic Particle Testing

Magnetic Particle Testing (MT) (also known as magnetic particle inspection – MPI) is a non destructive test (NDT) method, used to detect surface or subsurface (near to surface) discontinuities. This NDT method can be used on metals which can be easily magnetized (ferromagnetic). Metals can be classified as ferromagnetic, paramagnetic, or diamagnetic. Ferromagnetic metals: Ferromagnetic …

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(OFW) Oxy-Fuel Welding (Gas Welding/Oxy-Acetylene Welding)

Oxy-fuel welding (OFW) is also known as Gas welding or Oxy-fuel gas welding. The term ‘Oxy-fuel’ is used to denote a combination of Oxygen and a Fuel gas, means it’s a process in which Oxygen and a fuel (combustible gas) both are required. Most commonly used fuel gas is Acetylene and thus the name Oxy-Acetylene …

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Thickness range for welder qualification and procedure qualification (ASME Section IX)

Thickness range for performance qualification (welder qualification test): ASME BPVC section IX has provided guidelines for the thickness range up to which a welder can weld. This can be found in Table – QW 452.1(b) of ASME BPVC Section IX (2017 edition). A simplified version of that table is given below; According to this table …

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P Number, F Number and A Number in welding (ASME Section IX)

ASME Boiler and pressure vessel code (BPVC) has assigned certain numbers to base metals as well as to filler metals (electrodes). For base metals, ASME has assigned two number system, these are; P Numbers Group Numbers For filler metals, the number system which are assigned, are as follows; F Number A Number These numbers can …

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