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American standard flange ANSI B16.47 has two series, namely A series and B series. American standard flange also has an ANSI B16.5 standard number. Generally speaking, the flange size of B16.5 is less than 24. Inch, B16.47 flange is larger than 24 inch.
B16.47 A series is actually the name obtained after MSS SP44 standard flange is added to the American standard flange system, and B series is the name obtained after API 605 standard flange is added to the American standard flange system. This is MSS SP44, API Relationship between 605 flange and ANSI B16.47.
As for whether the A series flanges and B series flanges can be used universally, the answer is definitely not universal. This should be determined at the engineering design stage whether to choose A series or B series flanges, and A series and B series with the same pressure and size Flange, A series flange outer diameter, disk thickness, bolt hole diameter must be larger than B series, but the number of holes is less than B series, which results in a result, flanges of the same pressure size, B series is cheaper than A series Many, more economical, lower single weight, and lower redundancy conditions. Generally speaking, the selection of A series may require more requirements for the project to meet the requirements, the B series is more economical, the B series is slightly more used for ordinary pipelines, and the A series is slightly more used for gas pipelines. The two are generally not interchangeable.
The domestic standards SH3406 and HG20615 are derived from the ANSI B16.47 B series, which is the API 605 flange standard.
The above is the connection and difference between ANSI B16.47 A B series flanges.
Thanks for reading.
The United States and China may have turned down the heat on their trade war on Friday, but pressing pause on more tariffs is just the first step in ending a protracted dispute between the world’s two largest economies.
Officials from both countries provided details on how much in farm goods will be sold as well as some new rules on intellectual property.
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What isn’t in the 86-page agreement, which isn’t yet public, is how China will curb subsidies or scale back support for its state-owned enterprises.
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“There are still a lot of outstanding issues that you’re all aware of between the United States and China which are very serious issues,” U.S. Trade Representative Robert Lighthizer said in a briefing. “Our sense is we’re better off doing this in phases than to sit and make no progress at all.”
Here’s what we know of what has been agreed to so far, and what discussions still have to take place:
Some, not all, tariffs will be reduced.
President Donald Trump said he won’t impose on Sunday a 15 percent tariff on about $160 billion in Chinese imports, including consumer goods like smartphones and laptops.
The United States will also cut duties imposed in September on a list of Chinese imports valued at about $120 billion. The rates will fall from 15 percent to 7.5 percent for items like jackets, gloves, footwear and flat panel electronic displays.
Tariffs will stay at 25 percent tariff on $250 billion worth of imports. That will be leverage for extracting concessions from China in a second phase of talks, the president said.
“I think what China’s expectation is, is you have future phases and future reductions,” said Lighthizer.
Trump’s decision to cut the tariff rate was taken as a “gesture of goodwill,” outside adviser and China expert Michael Pillsbury told POLITICO on Thursday afternoon shortly after speaking to Trump.
The U.S. also agreed to increase the number of tariff exceptions it will grant Chinese imports that are still subject to duties, said Liao Min, China’s vice minister of finance. Liao said that China will also consider canceling another round of retaliatory tariffs on U.S. products that was set for Dec. 15.
What we know about promises to farmers.
China will commit to buy at least $40 billion a year in U.S. agricultural goods.
In 2017, China bought about $24 billion in farm products. That amount would provide a baseline, so the pledge would translate to a 66 percent increase or about $16 billion in additional agricultural exports each year.
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Lighthizer said the “goal” is for China to reach $50 billion worth of total purchases next year as well as in 2021.
Soybeans, pork, poultry, corn, wheat and rice were staples that Chinese officials mentioned would get more imports. Lighthizer said the specific targets for each commodity won’t be made public to avoid affecting commodity markets.
“The import of agricultural products from the United States will not affect China’s agricultural industry,” said Han Jun, vice minister of agriculture.
He added that imports of corn, wheat and rice will not exceed established quotas, and that the deal will provide gains for certain Chinese agricultural exports to the U.S. — specifically pears, citrus, dates and dairy products.
Chinese officials made clear, however, that any purchases will be based on market demand and in line with China’s commitments at the World Trade Organization.
Ning Jizhe, vice chairman of China’s National Development and Reform Commission, warned that expanding trade shouldn’t jeopardize China’s other trading partners.
“I need to stress here that larger trade cooperation must be based on market principles and WTO rules,” he said at a press conference, adding that U.S. imports must meet Chinese standards on quality, price and regulatory requirements.
A senior administration official, who briefed reporters on the condition he not be identified, said there were concrete agricultural purchases commitments, which are enforceable under the pact. He declined to speculate on why Beijing would not acknowledge that.
Beijing has also agreed to address a number of longstanding non-tariff trade barriers to U.S. agricultural exports, Lighthizer said.
“Some of the areas on which there’s a multitude of non-tariff barriers, some of the areas where those have been stripped away are beef, poultry, seafood, rice, dairy, infant formula, animal feed, feed additives, pet food and a variety of other agriculture biotechnology products,” he said.
Further details were not immediately available. U.S. farmers have been frustrated for years over Beijing’s slow approval process for biotech crops, which prevents the sales of some varieties of crops like corn and soybeans planted in the United States.
Expect U.S. to ship more oil and export more services.
China has committed to increase purchases of U.S. goods and services by about $200 billion within two years, Lighthizer said. That would help Trump’s goal to whittle down the $420 billion trade deficit the U.S. has with China.
“We have divided the U.S. exports into four categories: agricultural goods, manufactured goods, energy and services,” Lighthizer said.
A second U.S. official said the numbers would remain classified because of their potential to move markets and reveal of business proprietary information.
Chinese officials didn’t mention any specific targets but listed energy and manufactured goods as well as medical and financial services as areas of opportunity.
“It is up to the business sector and the market to say whether it is a good agreement or not,” said Liao, the vice minister of finance.
Are we there yet on these matters?
The U.S. said it has promises to fix nettlesome business protections issues this time around. China said it agreed to enhance protection of intellectual property, like protecting of trade secrets, extending drug patents, combating piracy and counterfeiting on e-commerce platforms, and cracking down on bad-faith registration of trademarks.
The agreement will also reflect China’s efforts to establish punitive damages — both civil and criminal — for violations.
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“The truth is for years China has been enhancing its protection of intellectual property and this is very much something that is needed on the part of China,” said Wang Shouwen, China vice minister of commerce.
But China’s previous commitments on such issues have been criticized, and it’s unclear which sanctions will work.
Beijing also said it won’t compel foreign companies to hand over technology to operate in the Chinese market. U.S. complaints on that issue formed one of the core reasons for launching the trade fight against Beijing in the first place.
“To me it’s an enormously important first step in our relationship,” said Lighthizer, who added that a violation of the commitment would be subject to the agreement’s enforcement mechanism and could result in tariffs being reapplied.
The promise most likely reflects China’s new foreign investment law, which has drawn criticism from U.S. business groups for not going far enough.
Chinese regulations that put the law into force continue to distinguish between foreign and domestic companies, which “enables the establishment of de facto requirements and limitations for foreign investors,” the business groups have noted.
Whether Trump administration officials have finally brokered changes remains to be seen.POLITICO NEWSLETTERS
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What about the money?
China and the United States also made certain commitments regarding the operations of their central banks in foreign exchange markets. They pledged not to engage allowing their currency values to fall so that goods are cheaper.
A senior U.S. official said the currency rules would be enforceable, meaning that a violation could be punished with more tariffs.
When talks were going badly with Beijing this summer, the Trump administration formally declared China a currency manipulator. That was the first time any administration had taken that step in nearly 30 years.
However, many experts said at the time the move was unwarranted, even if China had unfairly devalued its currency in the past.
There will be punishments.
The phase one deal will establish a dispute settlement process. Complaints can first be brought up before working-level officials and then elevated as high as the minister-level if they can’t be resolved. The enforcement process would give Lighthizer the last say in whether China had violated the agreement.
“Our expectation is that if we take our actions in good faith throughout this process that either side, the United States or China, will be able to take appropriate action and the other won’t be able to retaliate,” Lighthizer said.
What’s left for the negotiating table in 2020.
Trump administration officials acknowledged reaching a “phase two” agreement with Beijing will require tackling many difficult issues. One is how to overcome China’s requirement that American companies must store certain electronic business data in China, rather than outside the country, in order to operate there.
An especially irksome issue will be dealing with China’s billions of dollars’ worth of government subsidies that are bestowed on its state-owned enterprises. Chinese cyber intrusions into the United States have also been enormously difficult to curb, a senior U.S. official said.
“There are important issues that we do expect to address moving forward,” the official said. However, he declined to estimate what percentage of the United States’ overall objectives still remain to be done.
Jinan Hyupshin Flanges Co., Ltd provide knowledge of install gasket on pipe flanges. We are steel flanges manufacturer from China, supply all kinds and steel of pipe flanges, buy flanges contact us, email@example.com.
Select flange gasket media, temperature, pressure and working conditions should be important factors. For example, if the working pressure is not high and the plastic flange is used for butt joints (PN<6kg), the use of harder seals, such as F4 or metal materials, can lead to leakage due to improper material selection. Graphite materials and non-asbestos materials will achieve better results due to flexible effects, and vice versa.
For another example, in the working environment of chemical media, it is necessary to reasonably match different sealing media to achieve good results, otherwise unpredictable chemical changes can easily occur. Therefore, any flaws in the selection of seals can lead to unimaginable consequences.
The general gasket structure has the following types for reference:
1. Mostly used for flange joints are: a. Flat washers: material is made of medium-pressure asbestos, Pilot non-asbestos, oil-resistant asbestos, PTFE, graphite gasket or reinforced graphite gasket, metal flat gasket, special metal Gaskets, etc.
b. Wound gasket: with outer ring or with inner and outer ring (convex flat flange multi-purpose); with inner ring (convex flange commonly used); basic type (without inner and outer ring), slot-type flange special The sealing surface is narrow and flat-welded on a full-faced flange. The sealing surface is wider, equivalent to a wound gasket with inner and outer rings. It must be noted which standard the flange is.
2, used to rotate the shaft seal with a variety of fillers. Such as flexible graphite ring (open and not open), various materials braided packing (or packing ring), various materials inside and outside the skeleton oil seal YX ring and O-ring and so on.
3, for special parts of the sealed product. Commonly there are various sealing strips, PTFE ball valve seats, graphite rings and rubber parts butterfly valve rings, etc.
What should you watch out for when installing seals?
1. Do not damage the sealing surface of the seal surface or the sealing performance of the sealing line plane seal depends on the upper and lower two end surfaces; the sealing performance of the hydraulic seal depends on the lip line associated with the hole or the shaft. These parts are both soft and It is made of special materials, such as graphite, rubber, and fiber, which are resistant to heat, corrosion, and aging, and are vulnerable to damage. Therefore, they need special protection and care during handling, installation, and storage. Once damaged, they are often damaged. Will leave a lot of hidden dangers to the sealed parts;
2, can not be forced to install some seals are placed in the groove of the stuffing box, then need to be tightly fitted, construction can not be rough, barbaric, the action of a strong force will inevitably destroy the original prefabricated seal structure, which is like Impregnating the precast concrete and filling it in the required parts inevitably leads to disaster. The installation of such seals must be very careful and careful, and the insertion must be carried out step by step.
3. When installing, it is necessary to pay attention to the balance and symmetrically place the seal on the position just close to the effective sealing surface (or lip line). After the system is opened and used, further observation and tightening of the seal must be done to prevent the occurrence of micro-leakage due to changes in working conditions (such as pressurization) during system operation.
How to properly keep temporarily unused seals?
1. Anti-aging, light-proof, moisture-proof, flat, and away from cold and heat sources;
2. Do not apply pressure to maintain the natural relaxed state of the seal, and change its physical shape without applying external force;
3, classification mark (the same shape, different materials, use parts, applicable standards, stock date, etc.
Flange (flange), also known as flange or flange. Parts that connect pipe to pipe. Connect to tube end. There are holes in the flange, you can wear bolts, so that the two flanges closely linked. Flange sealed with gasket. Flanged pipe fittings (flanged pipe fittings) refers to the flange (flange or plate) of the pipe. It can be cast (not available), but also by screwing or welding. Flange coupling (flange, joint) by a pair of flanges, a gasket and a number of bolt nut composition. Gasket on the flange between the two flanges, tighten the nut, the gasket surface than the pressure reaches a certain value after deformation, and fill the sealing surface uneven, so that the connection tight leakage. Flange connection is a detachable connection. According to the connected components can be divided into container flange and pipe flange. Divided by the structure type, there is a whole flange, flange and threaded flange flange. Common flange flange welding and flange welding. Welded flat flange less rigid, suitable for pressure p ≤ 4MPa occasions; also known as flange welded flange, more rigid, suitable for high pressure and temperature applications. There are three types of flange sealing surface: flat sealing surface, suitable for low pressure, medium non-toxic occasions; concave and convex sealing surface, suitable for slightly higher pressure occasions; tongue and groove sealing surface, suitable for flammable and explosive , Toxic media and high pressure occasions. Gasket is a ring that produces plastic deformation and has a certain strength of the material. Most of the gaskets are cut from non-metal plates, or made by the professional factory according to the required size. The materials are asbestos rubber plates, asbestos plates, polyethylene plates, etc .; also thin asbestos (white metal, stainless steel) And other non-metallic materials wrapped up made of metal pads; there is a thin strip of steel and asbestos with winding wound gasket. Ordinary rubber gasket for temperatures below 120 ℃ occasions; asbestos rubber gasket for water vapor temperature of less than 450 ℃, the oil temperature is less than 350 ℃, the pressure is less than 5MPa occasions, the general corrosion Medium, the most commonly used acid asbestos board. In high-pressure equipment and piping, the use of copper, aluminum, 10 steel, stainless steel lens or other shapes made of metal gasket. High-pressure gaskets and sealing surface contact width is very narrow (line contact), sealing surface and gasket processing finish higher. Flange sub-threaded connection (silk) flange and welding flange. Low pressure small diameter wire flange, high pressure and low pressure large diameter welding flange are used, the pressure of the flange thickness and connecting bolt diameter and the number is different. Hyupshin Flanges supply all steel flanges forging pipe flanges when you choose and buy flanges contact us, firstname.lastname@example.org.
Introduction: With the popularization of gas, the construction and protection of gas pipeline engineering is very important. The supporting equipment also includes insulating flanges. Like insulating joints, insulating flanges are products for the petroleum and chemical industries.
The insulating flange has a simple structure and is safe to use. However, the insulating flange also has the difference between the old-fashioned insulating flange and the new insulating flange. The industrially developed advantages are the reduction of the production cost and the improvement of the product quality. Comparison of new and old versions of insulating flanges can better illustrate this point.
Vintage insulating flange
The composition of the old-fashioned insulating flange: between the two butt-welding plane flanges, flange insulating gaskets are installed, and insulating sleeves and insulating bolt gaskets are added to the fastening bolts. Its flange insulation gasket material is made of oil-resistant rubber asbestos board, neoprene rubber board, fabric base neoprene rubber board and PTFE material. Insulation bolt sleeves and bolt insulation gaskets are made of high-strength phenolic laminates and cloth tubes. Its characteristics are: good steel, stable insulation properties, need a special installation location dedicated installation, high cost.
New insulating flange
Appropriate improvements have been made to the structure of old insulating flanges. In the city gas transmission and distribution project, the pressure of the city gas transmission and distribution project is low (PN ≤ 2.5MPa) and the pipe network pressure PN ≤ 0.4MPa is improved. In the pipe network transmission and distribution project, steel flat flanges are used instead of butt welding plane flanges, flange insulation gaskets are made of PTFE, oil-resistant rubber asbestos pieces, neoprene rubber, etc., and the fastening bolts are insulated. The sleeve and the insulation pad will be two, and half of the insulation sleeve will be shortened to make an integral high-strength insulation sleeve. It not only saves the engineering cost, but also saves the on-site installation position. It is a simple and applicable new type of insulating flange, and the construction cost is particularly low.
JINAN HYUPSHIN FLANGES CO., LTD Make delivery for flange orders on June 20, 2017.
Ship to Italy.
Hello All Clients, Friends, Buyers,
As you know Chinese environmental protection policy are imposing increasingly and strictly, our flange industry was suffered great impact, our factory was received inspection every week almost, and in each inspection the production must be stopped (at least 2 day stopped per week), under this series circumstances, the order delivery time will be longer than before time, per container will take 25 days or more to complete at least, hope you can understand this serious situation and support us continue. This year the environmental policy was caused us very very difficult, but whatever we must support it, you know Chinese air water pollute was very serious, now we are updating our technology to reach the new policy. We also will do our best to make delivery as soon as possible.
Hyupshin Flanges Team.
Flange Order Shipment on June 18, 2017.