Welding Materials custody Welding material must be classified stored in a well-ventilated, dry, clean and dedicated two coffers custody. Treasury should thermometer, hygrometer, dehumidifiers and other related instruments and equipment, keep abreast of changes in temperature and humidity control Treasury. Welding materials should strictly distinguish between the type, grade, batch number, specifications and storage time, the welding material is to be partitioned sort dedicated rack placed in the welding material, in order to avoid confusion. Racks underlying, should be followed from the ground, the back wall> 300mm. Maintain air circulation, up and down the recommendations inside temperature> 5 ℃, relative humidity <60%, maintaining ventilated and dry warehouse. The Welding Rod handling stacked to be handled with care to avoid drug skin shedding, packaging supplies as used with the demolition lest electrode damp. Electrode long-term storage to save, to regularly sampling observed deterioration. Found core welding severe corrosion, the drug skin deterioration of electrode, is strictly prohibited for pressure parts welding may, at its discretion, downgrade for general structural welding. Reinspection qualified, subject to reinspection, substandard welding rod should be clear flag, partition storage. Create a welding rod requisitioning system and Taizhang. Issuance, use and recycling of welding materials The issuance of the welding material is divided into: an inventory of welding material to the secondary library dump issuance process measures after two libraries receiving electrodes, flux drying again welders release two procedures. Two library curators of welding materials should be based on the needs of the welding shop, a library to the welding consumables fill in the the welding material request for issuance single. A library curators of welding materials after the receipt of the welding material issuing requisitions based on the model of this single welding materials, grades, specifications and quantity issued a library curators of welding materials, inspectors, welding responsibility engineer should verify This wholesale amp welding materials, welding materials the two libraries curators verification, to confirm the welding material specifications, model grades and the number of welding material issuing records on signing the welding material is temporarily stored in the secondary database. Drying of welding materials for each batch should be a corresponding record, the record should include welding material models, batch number and examination number, drying temperature and holding time, the operator is responsible for drying signature and date. The welding materials Duplicate drying shall not be more than three times. Dry electrodes should be placed on the electric oven temperature is gradually warming up, not directly into the box drying temperature, especially wet welding rod to prevent rupture electrode covering. Dry cooler of low-hydrogen electrodes removed from the electrode incubator should put welders carry. Used with the check. Non-oil stains on the electrode to prevent weld porosity. The welders welding materials requisitioned in accordance with the requirements of the welding procedure, you should fill in the welding material picklists, this list should include the name of the production and product components and drawing number, production so that No. No. of welding procedure, welding material grades, specifications , lot number and test number as well as the recipients of welders. Confirmed a case-by-case basis, fill out and dated. A welding rod should be once finished welding, to reduce excessive weld joints reduce weld quality and impact of the weld appearance, the electrode head residual drug skin length should be less than 20mm. Maximize the use of electrodes to avoid wastage. Welding work is completed or after work, the remaining electrode must be in full return of the the welding consumables two library classification management of storage remaining head of the welding rod should be recycled and not be left at the workplace. The flux recovery should be clear inside the slag the shell, Suifen debris drying use after mixing with new flux. Control the custody and issuing of welding consumables, the supervisory inspector should periodically to a welding consumables, the custody of the two the Treasury spot checks welding consumables, drying, release, and recovery work, check the drying equipment, dehumidifiers, and hygrometer intact and confirm compliance with the relevant provisions, will confirm the results of inspection records credited to the supervisor in a timely manner.
15CrMo under high temperature conditions, having antioxidant activity and sufficient high-temperature strength as well as good heat resistance, is pearlitic heat resistant steel, the alloying elements chromium, molybdenum, widely used in the manufacture of boiler, turbine, power machinery, industrial parts and heat pipe work at a high temperature in the furnace, petrochemical and other industrial sectors. Guangzhou, a large steel-making two dust Engineering, dust removal system using German technology, the leading domestic level in the steel-making in environmental technology. Wherein the electric furnace and the converter heat pipe material 15CrMo steel pipe having a diameter of 2400mm, a thickness of 6mm. Pipeline topical reinforcement ring reinforcement, no lining inside. 15CrMo heat resistant steel used in the project is currently the diameter the dust high temperature piping design using the highest temperature of ≤ 540 ℃, welding and acceptance GB50235-1997 quality standard. One of the project, the same pipe material, improper welding process and measures after welding serious cracks, welding procedure test based on this pre-construction. The specific circumstances of the project, based on rich argon welding is easy to operate, stable arc, small spatter, high Welding Assembly efficiency, weld beautiful, good mechanical properties of welded joints using manual arc Welding Rod base is determined by demonstrating rich argon welding (Ar: 80%, CO2: 20%) to cover the welding process to combine. Large Diameter and Thin 15CrMo heat resistant steel pipe welding a suitable method to explore the technical problems solved Large Diameter and Thin 15CrMo easy to produce heat-resistant pipe weld cracking.