Seamless carbon steel pipes are made of steel ingots or solid billets through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn. The raw material of carbon Steel Pipe is a round tube blank, which is cut by a cutting machine into a billet with a length of about 1 meter, and sent to a furnace for heating through a conveyor belt. The billets are fed into the furnace and heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a critical issue. After the round tube blank is released from the furnace, it is pierced through a pressure punching machine. Generally, the more common punching machine is the conical roller punching machine. This kind of punching machine has high production efficiency, good product quality, large amount of perforation and diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively cross-rolled, continuously rolled or extruded by three rolls. Carbon Steel Tube, Mild Steel Pipe, Hot Rolled Steel Pipe, Weld Steel Pipe Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhouiron.com
At the request of President Li Yongwu, the petrochemical association constantly tracks industry-related issues in earthquake relief. The petrochemical association noted that the disaster relief work in the affected areas has entered a large-scale health and epidemic prevention stage. To achieve the purpose of disinfection and disease prevention, a large number of insecticides and fungicides are used in the disaster-hit areas, and a large number of fire-fighting waters are used. Hundreds of thousands of tons of drugs are sprayed into the environment and there are major hidden dangers of pollution to surface water, groundwater and soil. The experts of the petrochemical association wrote a special letter to the Ministry of Environmental Protection and suggested that the relevant departments coordinate and coordinate. In the work of hygiene and epidemic prevention, measures, norms, and requirements for preventing environmental pollution shall be formulated, and specific instructions shall be given to the operators so that scientific pesticide application can be conducted to avoid causing disasters. The occurrence of environmental pollution incidents.
Experts from the Petrochemical Association have received high attention from the Ministry of Environmental Protection. Zhou Shengxian, Minister of Environmental Protection, specially reported on the prevention of environmental pollution caused by pesticides at the State Council Earthquake Relief Headquarters meeting. Li Keqiang, vice premier of the State Council, attached great importance to this situation and immediately convened the departments of environment, sanitation, water conservancy, construction, and agriculture to hold meetings and study. After the meeting, the above-mentioned five departments jointly issued documents to affected areas such as Sichuan Province and issued notices to prevent insecticides such as “dichlorvos†from harming the environment and human health.
The circular emphasized that in accordance with the relevant requirements of the Ministry of Health and the Ministry of Agriculture on disinfection, insecticide and rodent control, the disease prevention and control shall be carried out scientifically. It is forbidden to use “dichlorvos†in the disaster-stricken areas and the pesticides such as “DDT†and “6-66†which are prohibited by the state, and pyrethroid pesticides are recommended. The agricultural sector must continue to actively coordinate the production and supply of pharmaceuticals and ensure the need to kill mosquitoes and flies.
The notice requires that we do a good job in the investigation of pollution sources, strengthen the monitoring of water sources and drinking water, and further increase the efforts to repair damaged sewage treatment facilities, water supply facilities and pipe networks, and resume normal operations as soon as possible. The circular emphasizes that water source and water quality monitoring should be carried out in accordance with relevant national standards, and monitoring frequency should be increased. If water source pollution or abnormal water quality is discovered, information should be exchanged in time so that effective measures can be taken.
1. Seamless steel pipe for structure (GBT8162-2008). Mainly used for general structure and mechanical structure. Its representative material (brand): carbon steel, 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
2. Seamless steel pipes for conveying fluids (GBT8163-2008). It is mainly used for conveying Fluid Steel Pipe in engineering and large-scale equipment. The representative material (grade) is 20, Q345, etc.
3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam pipes, large smoke pipes, small smoke pipes and arch bricks for locomotive boilers Hot-rolled and cold-drawn (rolled) seamless steel pipes of high-quality carbon structural steel for pipes. The representative material is 10, 20 steel.
The five departments jointly issued an emergency notice recommending the use of pyrethroid insecticides. The Emergency Management Office of the Ministry of Environmental Protection of the Environment Supervision Bureau specially called the China Petroleum and Chemical Industry Association on May 26 to raise questions about the experts of the petrochemical association about the epidemic prevention in the earthquake zone. , to prevent the use of pesticides, fungicides and other environmental pollution caused by the proposal to thank. It is reported that the proposals put forward by the chemical experts have been highly valued by the relevant departments of the state. The five departments including the Ministry of Environmental Protection have recently notified the disaster area.