[China Instrument Network Instrument Standards] On November 20, the Yunnan Provincial Bureau of Quality and Technical Supervision issued the draft of the local metrology technical specification “Verification Regulations for Intelligent Cold Water Meters” for consultation drafts, and it was requested by various measurement agencies, research institutes, and other relevant units. opinion.

(Image from the Internet, invaded)
The intelligent cold water meter is a cold water meter that consists of a base meter and additional electronic components. It has certain functions such as on-site digital display or remote digital display, prepayment, and multi-fees (ladder) billing.
This verification procedure is based on GB/T 778.1, “Drinkable Cold Water Meters and Hot Water Meters Part 1: Specifications for Measurement of Water Flow in Closed Full Ducts,” JJG 162 “Cold Water Meters”, CJ/T 224 “Electronic Remote Water Meters”. The relevant content, combined with the actual situation of Yunnan smart cold water meter manufacturing and application of the verification procedures.
The verification procedure belongs to the Yunnan Provincial Technical Supervision Bureau. Drafters include the Yunnan Institute of Metrology and Measurement Technology, Kunming Water Supply Equipment Manufacturing and Installation Co., Ltd.
The reference documents for the preparation of this verification procedure include GB/T 778.1, “Drinking Water Meters and Hot Water Meters for Drinking Water Measurements in Closed Full Pipes, Part 1: Specifications”; CJ/T 133 “IC Card Cold Water Meters”; CJ/T. 224 Electronic Water Meter; JJG 162 Cold Water Meter; JJG 164 Liquid Flow Standard Equipment; JJG 1113 Water Meter Verification Equipment;
This verification procedure is applicable to the first verification, subsequent verification and in-service inspection of the intelligent cold water meter.
This verification procedure includes the introduction, scope, reference documents, terminology and unit of measure, overview, measurement performance requirements, general technical requirements, measurement instrument control, and appendices in the organizational structure. (For more details, please see the attachment).

Weather Resistant Steel Plate

Weathering steel, i.e. atmospheric corrosion-resistant steel(Corten Steel), is a series of low-alloy steel between ordinary steel and stainless steel. Weathering steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel. It has the characteristics of toughness, plasticity, forming, welding and cutting, abrasion, high temperature and fatigue resistance of high-quality steel. The weathering resistance is 2-8 times of ordinary carbon steel and the coating performance is 1.5-10 times of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance, life extension, thinning and consumption reduction, labor saving and energy saving. Weathering steel is mainly used in railway, vehicle, bridge, tower, photovoltaic, high-speed engineering and other steel structures exposed to the atmosphere for a long time. It is used to manufacture containers, railway vehicles, oil derricks, seaport buildings, oil production platforms and containers containing hydrogen sulfide corrosive medium in chemical and petroleum equipme.

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