The welding work of gas steam furnace must be operated by the welder holding the test certificate of industrial boiler pressure vessel welder.
2. The welding dimension of the welding line shall meet the requirements of the design drawings and process documents, and the height of the welding line shall not be lower than that of the base material and smooth transition with the base material.
3. There are no cracks, pores, arc pits and slag in the weld and heat affected zone of gas steam furnace.
4, the bite depth of the weld does not exceed 0.5mm, the total length (the sum of both sides) does not exceed 1 �� 4 of the circumference of the pipe, and does not exceed 40 mm..
5. The construction of gas steam furnace strictly abides by welding operation rules and other standards and related regulations, and makes construction records of welding records for the record.
