Zhanjiang biogas storage tank detection
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Biogas fermentation, also known as anaerobic digestion, anaerobic fermentation and methane fermentation, refers to organic matter (such as human and animal poultry manure, straw, weeds, etc.) under a certain range of water, temperature and anaerobic conditions, through a wide variety, quantity The catabolism of a large variety of microorganisms with different functions, eventually forming a complex biochemical process of a mixed gas (biogas) such as methane and carbon dioxide.
General rules for welding 1 Before welding the biogas tank, first select the welding method according to the welding procedure qualification.
2 Personnel participating in the welding of biogas tanks must pass the examination and pass the certificate.
3 The welding material shall be kept by a special person. Before use, it must be dried according to the requirements of the welding rod instructions. The baked electrode should be kept in an incubator at 100~150 °C for use.
4 The drying, distribution and recycling of the welding rod must be recorded. When the welding rod is used, the holding tube should be used, and it must be re-baked after the allowable use time.
5 Before welding, the assembly quality should be checked, and the sand, rust, slag, moisture, oil and other contaminants in the range of 20 mm on both sides of the groove and the groove should be removed. The layers should be cleaned during the multi-layer welding. The face joint is welded on the reverse side and must be repaired after root cleaning.
6 The butt joint of the shell must be cleaned to the inner mouth. The residual height should be reduced as much as possible. The fillet weld should be smooth and not allowed to bulge outward. The weld seam is poorly smooth or poorly formed. The undercut must be free of undercut. .
7 The surface quality of the weld shall be free of defects such as cracks, pores, slag inclusions, craters and welds below the base metal.
8 In any of the following welding environments, if no effective protective measures are taken, no welding shall be carried out:
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