1. During installation, the stainless steel elbow can be directly installed on the pipeline according to the connection mode, and installed according to the position of use. In general, it can be installed in any position of the pipeline, but it needs to be easy to operate the inspection, pay attention to the flow direction of the stainless steel elbow medium should be upward below the vertical valve disc, and the stainless steel elbow can only be installed horizontally. 2. Stainless steel elbow with hand wheel, do not use lever or other tools, so as not to damage the valve. 3. Stainless steel elbow ball valve, globe valve, gate valve when used, only fully open or fully closed, not allowed to adjust the flow, so as to avoid erosion of sealing surface, accelerate wear. 4. Long-term storage of stainless steel elbow, should be regularly checked, often exposed processing surface must be kept clean, clean up dirt, neatly stored in a dry indoor place, pile or open storage is strictly prohibited. Always keep the stainless steel elbow dry and ventilated, keep the retainer clean and tidy, according to the accurate storage method. 5 stainless steel elbow valve packing gland bolts should be tightened evenly, should not be pressed into a crooked state, so as not to interfere with the stem movement or cause leakage.

Recently, the 2021 annual meeting of Chinas cast pipe and pipe fittings industry and the seventh general meeting of the board of directors of cast pipe and pipe fittings branch were held in Yingkou, Liaoning Province. More than 200 representatives of relevant enterprises, well-known experts and members of the cast pipe and pipe fittings industry from all over the country attended the meeting. The conference was hosted by China Foundry Association, and undertaken by casting pipe and pipe fittings branch of China Foundry Association and Liaoning Aiweier Metal Forming Technology Co., Ltd. Yao Chenghu, director of the national iron and steel products quality inspection center, and Gan Zhengbin, assistant director, were invited to attend.

With the theme of "safety, green, intelligence and cooperation", this meeting aims to build a safe, green, efficient and intelligent modern water system. At the meeting, Zhang Libo, vice president of China Machinery Industry Federation and President of China Foundry Association, Weng Yongcai, vice mayor of Yingkou Municipal Peoples government and other leaders attended the meeting and delivered speeches. Five well-known experts in the industry gave keynote reports respectively. Gan Zhengbin, assistant director of the center, was invited to give a report entitled "practice and Prospect of type test of ductile iron pipes" at the sub forum, The research direction of type test of cast iron pipe is analyzed. At the seventh general meeting of the board of directors of cast pipe and pipe fittings branch of China Foundry Association, the national steel and product quality inspection and testing center continued to be elected as the seventh governing unit and the only third-party testing organization of the branch.

In recent years, the center takes serving the quality improvement of Chinas cast pipe and pipe fitting industry as its own responsibility, provides technical support for material selection, pipe network safety and new product research and development in the water supply and drainage industry, serves more than 60% of the countrys cast iron pipe production enterprises, and has developed a fluid pipe flexible interface sealing performance test-bed. It is the only third-party testing organization in China that can carry out this project, It has provided witness testing services for international well-known certification bodies TV and SGS, and participated in the formulation of many new product group standards such as ductile iron polyethylene composite pipe and socket flexible interface steel pipe for water supply. In the next step, the center will further give full play to the technical support role of the national quality inspection center in the high-quality development of the service industry, and strive to become the inspection and test technical support base of Chinas casting pipe and even Chinas casting industry

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