Be taught in regards to the three kinds of steel pipes used within the petrochemical industry: seamless, ERW (electrical resistance welding) and LSAW (longitudinal submerged arc welding). 2 of which outer shape appearance is totally different from that of the plug 1 of the piercing machine (a length of the Continue Reading

The properties of carbon metal are excessive hardness, strength, wear resistance and anti-corrosion. Seamless pipes are generally produced and licensed to satisfy ASTM A-106, ASTM A-53, API 5L-B, and API 5L-X42 specifications. Electric Resistance Welding (ERW) pipe is manufactured by rolling steel after which welding it longitudinally throughout its size. Continue Reading

1)After a certain quantity of mild is irradiated to an organic photovoltaic machine, a photon having energy is absorbed by the natural semiconductor layer, and an electron is excited to transition from the valence band to the conduction band, leaving a vacancy on the valence band. Solar light also helps Continue Reading