Building a three-dimensional charging service system The “Kunming City Electric Vehicle Charging Infrastructure Special Plan (2016-2020)†(hereinafter referred to as the “Planningâ€) covers five aspects, namely General Conditions, Status Quo, General Requirements, Key Tasks, and Construction and Implementation, and is dedicated to the construction of residential residential areas and Construction of parking facilities for self-used parking facilities and public transport, rental, sanitation, logistics and other specialized parking facilities for the construction of special charging facilities, public building parking, social public parking, temporary parking spaces and other public charging facilities In addition, an intercity fast-charging station equipped with an independent urban rapid-charging station and highway service area is a supplemental electric vehicle charging service system for charging infrastructure. According to the “planningâ€, during the period from 2016 to 2020, the city will build 122 charging stations and 35,800 decentralized charging stations. Among them, from 2016 to 2018, 67 charging stations and 7,700 decentralized charging piles are planned to be built to meet the needs of the “Three-year Action Plan for the Development and Promotion of New Energy Vehicle Industry in Kunming City (2016-2018)â€. 10,000 electric vehicles are used; from 2015 to 2020, 55 charging stations and 28,100 decentralized charging piles will be planned and constructed to meet the total estimated increase of 27,300 electric vehicles in various fields. The "planning" made it clear that, in principle, 100% of the newly-built residential parking spaces should be built with charging infrastructure or construction and installation conditions; large-scale public buildings should be equipped with parking lots; social public parking lots should be built for charging infrastructure or reserved for construction and installation. The condition of the parking spaces shall not be less than 10%. At least one public charging station shall be built for every 2,000 electric vehicles. As far as the construction mode is concerned, the charging facilities for special areas such as public transport, rental, sanitation, tourism, and logistics are mainly centralized charging stations, supplemented by decentralized dedicated charging piles (groups), and the vehicle-using units themselves or commissioned to construct charging facilities. Public charging facilities are mainly decentralized public charging piles (groups), supplemented by centralized public charging stations, mainly to meet the charging needs of various types of electric passenger vehicles; electric vehicle production enterprises (including vehicles authorized by the production enterprises The sales organization) is responsible for the construction of charging facilities in the private sector and is included in the after-sales service system. The residential property and the owners' committee shall provide support for the construction of charging facilities. On the expressway side, the “planning†proposes that in the Longming Expressway Service Area, Hangrui Expressway (Kunming-Qujing) Ssangyong Service Area, Hangrui Expressway (Kunming-Dali) Reading Service Area, Lubei Service Area, Kunming Expressway (Kunming-Yuxi) Chenggong Service Area, Kunming-Yuxi Yujiahai Service Area Planning and construction of 6 pairs of intercity speedway public charging stations, and increase of the Kunzhuang-Shilin Yangzong Service Area, G85 Expressway (Kunming-Xiandian) Xiaojie Service Area, G85 Expressway (Kunming-Dongchuan) Panzhi Service Area, Kunwu Expressway (Kunming-Luquan) Fumin Service Area 4 pairs of intercity highway public charging stations to meet and cover Kunming to Shilin County, Xundian County, Dongchuan District, Luquan County, 4 long-range charging requirements. It is expected to invest 410.26 million yuan While clarifying the objectives, the "Planning" also proposed to prioritize the construction of charging infrastructure in the public service sector, actively promote the construction of charging infrastructure for users, accelerate the construction of urban public charging networks, and vigorously promote the construction of intercity fast charge networks. , Simultaneously build eight key tasks for charging smart service platform, strengthening supporting power grid support capabilities, actively exploring sustainable business models, and conducting related pilot demonstration work. In promoting the construction of charging infrastructure for public services, the "Planning" proposes that electric vehicles in the public service field, such as public transportation, sanitation, and airport commuting, should be given priority to the construction of charging infrastructure based on the operational needs of the line. At the same time, it is necessary to reasonably arrange and reserve the land for the charging station of independent land occupation in the relevant detailed control plan along the line. The newly-built and rebuilt public transport and sanitation stations and transportation hubs are planned to reserve the charging facilities required to meet the planned number of electric vehicle operations in the future. In terms of exploring sustainable business models, the "planning" proposes to encourage the exploration of development methods that combine large-scale charging stations with commercial real estate, and guide shopping malls, supermarkets, cinemas, convenience stores and other commercial establishments to provide users with auxiliary charging services. Encourage charging service companies and auto companies to innovate business cooperation models in sales and after-sales services. Make full use of the financial leasing model, learn from contract energy management and other business models, and promote business model innovation. We will vigorously promote the “Internet + charging infrastructure†related business model and service innovation, introduce new business models such as crowdfunding, online and offline integration, and actively expand value-added services such as smart charging and discharging, e-commerce, and advertising to attract more societies. Participate in resources to improve the company's ability for sustainable development. According to calculations, the integrated unit price for the construction of a dedicated bus rapid charging station is 4.6 million yuan per project (including expansion and expansion costs, excluding land fees, the same below), the city public charging station is 3.4 million yuan per project, and the special charging station for sanitation vehicles is RMB 1.84 million per project, the charging station for logistics vehicles is RMB 1.68 million per project, the charging station for coaches is RMB 2.99 million per project, the public charging station for the intercity highway is RMB 1.24 million per project, and the construction of decentralized electric piles is comprehensive. The unit price is 10,000 yuan / month (no increase in expansion costs, no land costs). As a result, a total of 410.26 million yuan was invested in 122 charging stations and 35,800 decentralized charging stations.
Welding elbow is shrimp "turn", it can be in the pipe or plate cutting after welding and become, and its specifications can be large. The number of nodes and the bending radius are determined by the producer. Welding bending is not very smooth, both of the bending radius is not large, generally about 1 times the diameter of the pipe.
Photo of Welded Bend:
Classification of welding elbow, according to its radius of curvature,
45 degree elbow
Can be divided into long radius elbow and short radius elbow. Long radius elbow refers to its radius of curvature is equal to 1.5 times the diameter of the tube, that is, R=1.5D. short radius elbow refers to its radius of curvature is equal to the outer diameter of the pipe, that is, R=D. D in the formula is the elbow diameter, and R is the radius of curvature. The most commonly used for 1.5D elbow, if not specified in the contract is 1D or 1.5D, then it is to optimize the use of 1.5D. GB/T12459-2005, GB/13401-2005, GB/T10752-1995., is the most commonly used executive standard in China.
Pressure grade classification
If according to the pressure level, there are about seventeen, and the United States pipe standards are the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS,; Sch
180 degree welding elbow
80, Sch100, Sch120, Sch140, Sch160, XXS, which is the most commonly used STD and XS two. According to the angle of the elbow, 45 degree elbow, 90 degree elbow and 180. Species as a result of the elbow is a lot, when ordering, order is often taken as described in the following methods: such as "LR STD 90 8", said long radius, pressure rating for STD, 90o 8 "elbow; and as," 45 DEG SR XS 4 "said short radius, pressure rating for the XS and 45 degrees of 4" elbow. The above is about the classification of the elbow. Three links, there are two kinds of general. The diameter of the three equal diameter is equal to the diameter of three links, and both ends are the same diameter, but the diameter of the junction is different from that of the other two diameters. The method is as follows: for the equal diameter three links, such as the "T3" three general, the outer diameter is 3 inches and three inch diameter. For different diameter three links, such as the "T4 x 3.5 x three" means that the same diameter of four inch diameter of 3.5 inches of 4 inch diameter. The pressure level is the same as that of the elbow, and the range is the same.
This is the big head, method. Head size of said method is big diameter multiplied by the head diameter, for example "8 x 6" said big head with a diameter of 8 inches and head diameter is 6 inch head size.
Material division of welding elbow
Carbon steel: A234 WPB ASTM/ASME, WPC
Alloy: A234 WP 1-WP 12-WP ASTM/ASME 11-WP 22-WP 5-WP 91-WP911 15Mo3, 15CrMoV, 35CrMoV
Stainless steel: A403 WP 304-304L-304H-304LN-304N ASTM/ASME
A403 WP 316-316L-316H-316LN-316N-316Ti ASTM/ASME
A403 WP 321-321H ASTM/ASME A403 WP 347-347H ASTM/ASME
Low temperature steel: A402 WPL3-WPL ASTM/ASME 6
High performance steel: A860 WPHY 42-46-52-60-65-70 ASTM/ASME
structure
Welding elbow appearance
As the appearance of the welding elbow, then we say that the appearance of the welding elbow bar. Welding elbow appearance are fixed, of course, the general welding elbow appearance is according to different steel tube and to choose the different knowledge of welding elbow, so, in order to ensure the welding elbow appearance, usually Steel Pipe in the future, if not been yard rain washing off, then welding elbow after high temperature push general weld appearance of the elbow is appear out of the blue, of course, if the rain washed, we in high temperature after heating, heating welding elbow surface color are red. But overall, we guarantee tube is washed by the rain is very difficult, because is yard in summer is rain fog water washed, then push the system out of the welded elbow surface is red, too.
Technical requirement
Geometric dimensions include outside diameter, inside diameter and wall thickness. Also requires control
Radius of curvature. For example, the radius length is 1.5D, and the radius of curvature must be within the range of tolerances required. Due to these fittings, most used for welding, in order to improve the welding quality, end vehicles into the groove, leave a certain angle, side band, this requirement is quite strict, edge thick, at an angle of number and range of deviation provisions, geometric size than pipe much many. The surface quality and mechanical properties are basically the same as that of the tube. In order to facilitate welding steel, and the connecting pipe are the same. Fourth, is all the pipe fittings should be through the surface treatment, the inner and outer surface of the oxide scale through shot blasting, and then coated with anticorrosive paint. This is not only for export needs, in addition, in the country is to facilitate the transport to prevent rust oxidation, to do this work. Fifth is the packaging requirements, for small pipes, such as export, you need to do wooden, about 1 cubic meter, this provision in the case the number of elbows about not more than a ton, the standard allows the suit, large sets of small, but the total weight usually do not more than 1 ton. For large to a single package, like 24 "must be a single package. The other is labeled packaging, labeling is to indicate size, number, batch number, manufacturer trademark. In the pipe to be stamped on stamp, and attached to the packing list and the quality book file.
Welded Bend Welded Bend Without Flanges,Welded Bend Pipe,Seamless Welded Bend,Welded Bend With Flanges Unisite Group Ltd. , https://www.shipsparts.nl
Kunming to build 122 electric vehicle charging stations 
Kunming Electric Vehicle Charging Station 
Recently, the Ministry of Industry and Information Technology of Kunming City and the Municipal Development and Reform Commission jointly convened a press conference on the planning and management of electric vehicle charging infrastructure in Kunming. It is reported that during the 2016-2020 period, the city will build 122 charging stations and 35,800 decentralized charging stations to meet the 37,300 electric vehicles predicted to grow in various fields in the next five years. The plan is based on 2015 as the base year, the most recent period is 2016-2018, and the long-term period is 2019-2020.