In the fluid piping system, the valve is the control element, its main role is to isolate the equipment and piping system, regulate the flow rate, prevent backflow, regulate and discharge pressure. Because it is very important to choose the most suitable valve for the pipeline system, it is important to understand the characteristics of the valve and the steps and basis for select

1. Valve stem corrosion and protection Main causes of valve stem corrosion: The corrosion damage of the valve body is mainly caused by the corrosive medium, and the valve stem corrosion problem is mainly the packing. Not only the corrosive medium causes corrosion damage to the valve stem, but also the steam and water can make the valve stem and the packing contact spot. In part

At 13:00 today, with the issuance of gas production instructions, the production valve of Nanpu No. 1 gas storage well of Jidong Oilfield Branch of petrochina Co., LTD., located in Tangshan Sea of Bohai Sea, opened, and natural gas smoothly entered the production device along the process pipeline and was transported to the Beijing-Tianjin-Hebei region, which marked the official op

At 15:58 on November 12, with the opening of the last valve room No. 2 of Qinggao Line (Qing1 gas collection Station to Gaoshawo), natural gas in Ningqing block of Yumen Oilfield was smoothly injected into Qinggao Line pipeline, marking the era of "pipeline natural gas transmission" in Yumen Oilfield. Previously, Yumen oil field natural gas production is small, can not be directl

Fixed shaft ball valve is commonly used on natural gas pipelines, and its general inspection method is: turn the valve to the fully open or fully closed position, and check whether there is leakage through the discharge of the valve body drain nozzle. If it can be drained clean, it proves that the seal is good. If there is always pressure discharge, the valve can be considered to be leak

Since the beginning of this year, Tuha Oilfield has established a "highway" for shale oil, tight oil and other reservoirs through various fracturing methods, so that beneficial oil can emerge from the rock joint. So far this year, the field has fracked 38,000 tons of oil, a 15% increase over the same period last year, and the cost has fallen by 10%. The new strata in Tuha oilfiel

1. Inspection of appearance and logo Check content: whether the appearance of the valve has defects, such as cracks, bubbles, dents, etc. Check signage, nameplate and finish for compliance. Standards: International standards including API 598, ASME B16.34, ISO 5208, etc. Chinese standards include GB/T 12224 (general requirements for steel valves), GB/T 12237 (steel ball valv

Ball valve has many kinds of structure, but basically the same little difference, are the opening and closing parts for the round ball core, mainly by the valve seat, ball, sealing ring, stem and other driving devices, etc., through the stem rotation 90 degrees to achieve the opening and closing of the valve, in the pipeline for shutting off, distribution, adjust the flow size and change

On August 22, the oil and gas produced by the oil Wells under the supervision of Wangxuzhuang Oilfield in Dagang was directly transported to the joint station, and low-carbon and efficient operation was realized through the first-level distribution station. In order to promote green development, Dagang Oilfield has gradually promoted the application of a new surface system model.

In the thermal system, the thermal trap plays a very important role, and its performance directly affects the stability and energy efficiency of the steam system. As the key equipment in the steam system, the thermal trap can not only automatically remove condensate, prevent the occurrence of water hammer phenomenon, but also effectively prevent the leakage of steam to ensure the

As of October 31, 1,750 Wells had been drilled and 997 Wells had been put into operation in the production capacity construction of the self-operating area of Changqing Gas field, with the gas contribution of new Wells reaching 1.15 billion cubic meters, and the quality and efficiency of gas field development had been improved, ensuring the long-term energy storage of natural gas

Gate valves usually have single gate, double gate, wedge, parallel and other structural designs, in which wedge double gate (Z42, Z62 series) and wedge elastic gate (Z40, Z60 series) are the most widely used, the former is closed, the gate automatically fits both sides of the seat, automatically compensates the wedge Angle processing position error; The latter relies on the elasti

The sealing performance of the valve directly affects the control effect of the fluid medium and the safe operation of the system, the grinding of the valve sealing surface is one of the important means to ensure its sealing performance, its main purpose is to eliminate the uneven sealing surface, defects and particles, improve the surface smoothness and roughness, so as to achiev

Sealing surface is the most critical working face of the valve, the quality of the sealing surface directly affects the service life of the valve, and the material of the sealing surface is an important factor to ensure the quality of the sealing surface. Therefore, the following factors should be considered when selecting valve sealing surface materials: ① Corrosion resistance.

On September 19, the oil production plant No. 3 of Huabei Oilfield, which had been shut down for more than 4 years due to high water cut, opened the well with ultra-short radius horizontal well technology, and the daily oil production reached 11 tons, which has been stable for 48 consecutive days. In Huabei Oilfield, ultra-short radius horizontal well technology is used to excavat