Is Valve quality the reason of China chemical EXPLOSION: Yancheng chemical factory In March 21th

As Valve supplier, an occupation habit, each accident /explosion showed in media, we can’t help wondering whether it is caused by valve quality problems?  Although the probability is not necessarily very high. We will constantly remind ourselves to concentrate on improving valve quality and take this as a precaution.

44 killed, at least 90 people were seriously injured in the explosion at the Jiangsu Tianjiayi Chemical Co., the state-run China News Service said Friday, and 32 of them were critically ill. Videos circulating online showed people who appeared to have been cut by glass and other debris, eastern China’s Jiangsu province on 2019 Thursday (March 21) afternoon.

Explosion-in-China-yancheng-chemical-plant-Footage showed people lying on the ground

Continue reading “Is Valve quality the reason of China chemical EXPLOSION: Yancheng chemical factory In March 21th”

Safety Operating Regulations for Welders-valve

Safety Operating Regulations for Welders-valve

1. Valve Welders are special types of work. They can operate independently only after they pass physical examination, professional and technical training, examination and issuance of “Operation Certificate for Special Types of Work”.

2. Welding grounding, prohibiting stacking of inflammable and explosive articles, should be equipped with fire fighting equipment to ensure adequate lighting and good ventilation.

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Classification of Valve

Valve Classsification

When design valve, selcect valve type, purchase valve, we need to know valve classfication first.

The first category
Automatic valve: to rely on the media (liquid, gas) own abilities and self-action of the valve. Such as check valves, safety valves, control valves, steam traps, valves, etc.

The second category
Actuated valves: With manual, electric, hydraulic, pneumatic valves to manipulate the action. Such as gate valves, globe valves, throttle valves, butterfly valves, ball valves, plug valves, etc. Continue reading “Classification of Valve”

China Valve Industry

Valve oil, shipbuilding, nuclear industry, a variety of low-temperature projects, chemical, power station, long distance pipeline, aerospace and marine oil and other economic sectors indispensable fluid control equipment.

After years of development, China’s valve business volume ranks first in the world. There are about 6,000 up-scale enterprises totally, among them, there are 900 which annual output value over 500 million.

In china current valve market, in addition to low-pressure valve have achieve a level acceptable for the international market, the high-pressure valves still need to rely on imports. Thanks to continuous good macroeconomic situation, most production and sales targets  of valve industry are maintaining rapid growth, howover industry sales and profits dropped significantly over last year due to the price war. As the world economy revovery slowly, import and export of our valve products also increased gradually. Because of the high-end technology, compared with foreign manufacturers,there are still a wide gap in the next period of time. Product technology will be a bottleneck restriction of our valve products development.

In some opinion, China’s valve industry is now capable of producing more than a dozen categories of products, such as gate valve, globe valve, check valve, ball valve, butterfly valves, safety valve, relief valve, piston valves, plug valves, knife gate valve, slurry valve,  filter, foot valve, control valves, diaphragm valves, balance valve, solenoid valves, forged steel valves, needle valves, liquid level, flow meter, breather valve,  exhaust valve, flame arrester, instrument valves, copper valve, stainless steel valves, lined rubber lined valves, Pinch Valve,  power station valve, hydraulic control valve, vacuum valve, discharge valve, pneumatic angle seat valves,the U.S. standard valve, insulation valve, discharge valve, the maximum temperature reached 570 ℃, a minimum of -196 ℃, the maximum pressure of 600MPa, the maximum diameter to 5350 mm. In addition, according to the relevant departments of Statistics, China’s valve market turnover each year up to 500 billion yuan, of which more than 100 billion market take up by the foreign valve enterprises.

At present, China’s valve industry, there are still some problems, such as valve company in China are mainly low-level, small-scale, family-owned enterprises. About products, due to duplication of investment, technology transfer is not enough, the valve leading enterprise products in China is still low quality mass products. China’s production is currently widely impressed with following shortcomes,  leakage of various valves, internal leakage, the poor  appearance, short life, the operation is not flexible and electric valve actuators and pneumatic devices are not reliable, some of the products technology is only about 80s of the last century early international level, a number of high temperature and pressure and the critical need for the valve device is still rely on imports. Besides, A big gap between china and foreign is still existed in the industrial structure of China’s valve industry, valve industry, the industrial chain, and industry degree of specialization.

The reason of poor quality valve: the rapid market expansion, the original state-owned enterprises have been close, stop, merge,  transform, although a number of township enterprises developed rapidly, due to the low starting point of township enterprises, the technical power is very weak, poorly equipped , imitation products are mostly production, especially for the low pressure valve in water industry.

But the problem does not affect the future prospects of China’s valve industry wide. This is mainly due to the support of national policies and strong market demand for valve products, especially in several centuries, “natural gas”, “West to East”, “South” and started the project requires a large number of valve products supporting. In addition, China is faced with the arrival of the industrial age, the petrochemical industry, power industry, metallurgy industry, chemical industry and urban construction will push the use of large valve products. For example, the power industry,  coal units in large and medium-sized valves required for the project started was forecast totally:  153,000 tons valve, 30,600 tons in the average annual ; valve amount of the total demand of 39.6 billion with an annual demand amounted to 792 million yuan. In addition, China is becoming the world’s largest factory, manufacture for valve products with even greater space for development.

Thus, as long as companies can seize opportunities, strengthen research and development capabilities, and continuously improving product technology and product quality,  can have a bright future in the fierce market competition.

Application of Plastic Valve in Industrial Piping

Application of Plastic Valve in Industrial Piping and Requirements

The advantages of using plastics are constantly being discovered. Over the past few years, there has been a dramatic increase in the application of plastic valves and piping systems in areas where metal valves were thought to be the only solution. So plastic or metal? It should consider valve base seal test, valve seal test, valve strength test, long term valve test, fatigue test and operating torque test by using reasoble method and standard, to compare cost performance of plastic valve and metal valve.

There are many types of plastic valves.Include Ball valves,Butterfly valves,Needle valves,Drain valves, Float valves, Gate valves, Globe va lves, knife valves (similar structure with gate), pinch valves,  Check valves, Poppet valves, Plug or stop-cock valves, Diaphragm valves, Directional valves , Diverter valves. Other types of plastic valves include shut off valves, solenoid valves, sanitar valves or hygienic valves, sampling or dispensing valves,  and toggle valves.

Selecting plastic valves requires an analysis of performance specifications, actuation methods, and connection types.

Performance specifications include valve size, pressure rating, number of ports or ways, media temperature, and valve flow coefficient. Suppliers specify valves according to metric or English (imperial) measurements.

Some plastic valves are actuated manually, by a hand wheel or crank, or with mechanical devices such floats and cams. Others are actuated by electric, pneumatic, electro-hydraulic, or electro-hydraulic methods.

Connection types for plastic valves can be many. Examples include compression fittings, bolt flanges, clamp flanges, union connections, tube fittings, butt welds, and socket welds. Plastic valves with internal or external threads for inlet or outlet connections are also available.

Nowadays Plastic valves are been used for following application:powders, rendering wastes, sludge, slurry, ash slurry, coolants, hazardous materials, liquid metal,wastewater, gasoline, diesel fuel, lubricants, air and compressed air, hot and cold water, salt water,high viscosity fluids, hydraulic fluid liquefied petroleum gas (LPG), natural gas, abrasive materials, acids, and adhesives.

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Marathon Petroleum to Purchase BP’s Texas City Refinery – Valves

Marathon Petroleum Corp. (MPC) today announced it has signed a definitive agreement to purchase BP’s 451,000 barrel per calendar day (475,000 barrel per stream day) Texas City refinery, three intrastate NGL pipelines originating at the refinery, an allocation of BP’s Colonial Pipeline Company shipper history, four terminals, retail marketing contract assignments for approximately 1,200 branded sites and a 1,040 megawatt cogeneration (cogen) facility. The base purchase price is $598 million, plus inventories estimated at $1.2 billion. The agreement also contains an earnout provision under which MPC could pay up to an additional $700 million over six years, subject to certain conditions. The transaction is expected to be accretive to earnings in the first year of operation. Continue reading “Marathon Petroleum to Purchase BP’s Texas City Refinery – Valves”