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  • Process for pickling and passivation of stainless steel pipe fittings

    Stainless steel pipe fittings for pickling passivation operation steps: 1. The preparation work 2. Chemical degreasing 1) chemical degreasing adopts groove soaking method, in addition to tank made of steel plate, the lining of PVC or PE. 2) use 12 ~ 15% (by volume) of nitric acid chemical degreasing treatment, temperature of 40 ℃ ~ 60 ℃, time is 2 ~ 4 hours. 3) stainless steel pipe fittings soak in the tank, should pay attention to the location of the place, avoid tube saved the air. 4) in the process of soaking should move up and down or the turning of stainless steel pipe fittings, the lumen solution change constantly, in order to improve the effect. When it is necessary to take out the stainless steel pipe fittings, soaked in water flushing after. 5) chemical degreasing and stainless steel pipe surface wetting by water completely. 3. Hot water rinse 1) after oil removal of stainless steel pipe fittings are taken from the in addition to the oil tank, soaked in 40 ℃ ~ 60 ℃ hot water tank inside the rinse, 5 ~ 20 minutes. 2) hot water tank made of steel plate, the lining of PVC or PE. 3) the content of chloride ion in water is less than 25 PPM. 4. Rinse with water 1) water rinse the stainless steel pipe fittings (0.1 Mpa pressure P P) with pressure water to wash. 2) the content of chloride ion in water is less than 25 PPM. 5. Passivation 1) passivation using slot in the pool. 2) passivation channel steel plate production, spread acid plastic lining. 3) soaking groove, attention should be paid to the location of the placement, avoid tube saved the air. 4) in the process of soaking should move up and down or the turning of stainless steel pipe fittings, the lumen solution change constantly, in order to improve the effect. When it is necessary to take out the stainless steel pipe fittings, soaked in water flushing after. 6. Dry After passivation of stainless steel pipe fittings, to grasp with clean compressed air or nitrogen blow dry, and must have enough time (at least 2 hours) in natural passivation in the air. 7. Inspection Should be done after passivation of stainless steel pipe fittings, self-inspection, mutual inspection, acceptance and then submit qc inspectors as required. 8. To protect 1) outside need to paint the surface of the pipe fittings, such as is carried out in accordance with the coating requirements. 2) after the inspection of stainless steel pipe with plastic plug seal, in three fabric bandage to protect, and identified. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

  • Environmental Recycling of stainless steel pipe fittings

    Weighed against welding and threading operations, stainless steel pipe fittings on-site installation is extremely convenient. Leakage rate is low, environmental protection, not easy to cause danger. It can be worth mentioning how the installation site installation time is simply welding operation or threading operations 1/3 x, not simply shorten from the period, but also reduce costs. 100% recovery. Stainless steel fittings may be 100% recycled. Has excellent corrosion resistance, in the long-term use will not likely expand. In addition, it provides a small transport energy consumption. Due to the high strength, the potential of leakage is greatly reduced, saving plenty of water. Match the health requirements. Carbon steel pipe in order to meet the state of hawaii mineral water quality standards, will not cause secondary pollution of water. Reduce heat loss. Stainless-steel pipe insulation properties of copper pipe material is 24 times, greatly decreasing the geothermal energy in some hot water transport losses. Moreover, stainless pipe fittings also can avoid contamination. It does not pollute the top-grade sanitary ware, to avoid the appearance of the tableware “red” and “blue print.” After forty years of development, stainless pipe fittings, compression fittings is the mainstream of Europe, Asia, the United States and other developed countries and also the trend of vigorous development, the reasons are summarized as follows: reliable connection, strong connection, connection strength, vibration. In addition, it avoids the opportunity of “unite” loosening, for example due to shell vibration, water hammer vibration, pipe resonance, and earthquakes.

  • Production method of stainless steel seamless pipe

    Stainless steel seamless pipe according to the different production methods can be pided into hot rolling, cold rolling tube, cold drawn tubes, extruded tube, etc. 1, hot-rolled seamless steel pipe in automatic rolling on production unit. Solid billet through inspection and clear the surface defects, cut into the required length, centering on the tube billet perforation end face, and then sent to a heating furnace, punched on the punch. In perforated revolve and progress at the same time, under the action of roll and head, tube billet internal cavity formed gradually, according to the capillary. Then sent to automatically continue rolling mill. Finally approved by reeling mill all the whole wall thickness, the sizing sizing machine, to meet the specification requirements. Hot rolled seamless steel pipe production by continuous rolling pipe unit is a more advanced method. 2, if you would get a smaller size and better quality seamless steel pipe, must adopt the method of cold rolling, cold drawing or both combined. Cold rolling is usually conducted on two-high rolling mill, steel pipe in variable cross section round hole groove and motionless conical head of rolling in the annular groove. Cold drawing usually in 0.5 ~ 100 t single or double chain chain cold drawing machine. 3, extrusion method, the heating tube billet in airtight extrusion cylinder, perforated rods and extrusion, extrusion from smaller extrusion die. This method can produce smaller diameter of seamless steel pipe. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

  • Connection types and classification of the new standard flanges

    GB flanges usually are used in pairs to connect to the pipeline within the pipeline project, which is a disc – shaped part. Different pressure flange with various thickness and bolt. Give the attachment of other objects position around the shaft protruding edge, collar or ring these are known as flange, like ventilation pipe connection. Specification/ Dimension of GB flanges Description of GB flanges GB flange system is Chinese grade flange, this system is made according to ansi flange system and din flange system, include GB/T 9112 – 9113.4 – 2000, DN10-DN2000, GB/T 17241.1 – 17241.7, DN10 – DN4000, GB/T 15530.1 – 15530.8, DN10-DN1800 etc., Pressure grade from PN0.6,1.0,1.6,2.5,4.0,6.4,Mpa Type: WN Forged Flange Material: Carbon steel: A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22.8, Stainless Steel: F304 F304L F316 F316L 316Ti, Copper etc. Standard: GB/T 9112 – 9113.4 – 2000, DN10-DN2000, GB/T 17241.1 – 17241.7,GB573-581-76,GB10746-10749-89 Size: DN10-DN4000 Pressure: PN 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa, 6.4Mpa Packing: No Fumigate or Fumigate Plywood/Wood Pallet or Case Surface Treatment: Anti-rust Oil, Transparent/Yellow/Black Anti-rust Paint,Zinc,Hot dipped Galvanized. E-catalogue: Available , please visit catalogue of flange Usage: Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects etc. The modern standard flange connection is an important connection from the pipeline construction. The usage of bolts to two pipes, fittings or equipment is connected together referred to as the flange connection, but in addition backward and forward flanges, you need to add some flange gasket into a fixed connection. Many of the fittings and equipment which currently have flanges may also be connected by flange. The newest standard flange may be separated into the threaded connection flange and welding flange. Low pressure and small diameter cases are suitable for wire flanges, while welding flanges tend to be frequently used in high / low pressure and large diameter situations. Flanges with assorted pressure can have different thickness, as well as the diameter and number of the connecting bolts. In accordance with the pressure level, the flange gasket can also get a number of materials, like low pressure asbestos gasket, high-pressure asbestos gasket, metal gasket, etc.. Can withstand great pressure, flange connection is easy to use. The new standard flange connection is trusted in industrial pipeline. In this series, the pipe diameter is small , the stress is low, it’s impossible to view the flange connection. However, should you be from the boiler room or production site, the flange pipe and equipment will probably be offered to anyplace.

  • Notice of installation reducer

    When the reducer is installed, in the event the diameter of the internal pipe diameter and aperture size doesn’t match, then you should be appropriate for the neck shrinkage or expansion. After installation, so as not to affect the distribution with the velocity field, pressure loss is ultimately caused, and the measurement accuracy in the electromagnetic flowmeter is necessary. Normally, the biggest market of the cone angle can be controlled at less than 15 degrees. Notice of installation reducer 1. If the fluid flows in the pipe, the flow changes in a small range, whether it be increased or reduced, you should use the reducer. 2. When installing kit reducer, we should attempt to avoid cavitation with the pump inlet position. Three. When installing a reducer in the inlet position with the pump, the gas needs to be guaranteed not to be condensed from the lower position. 4. If the inlet in the pump is changed, the concentric reducer ought to be selected. In the event the pipe all the way through in to the pump, you need to pick the top flat reducer if the order is from top to bottom, you need to find the bottom flat speed reducer instead. 5. Within the installation process, the flow meter needs to be selected according to the actual flow rate in the process pipe.

  • What is the high temperature alloy?

    What is the high temperature alloy? High temperature alloy is also called hot strong alloy, super alloy. The materials can be pided into three groups: iron, nickel and chromium. According to the production method can be pided into the deformation of high temperature alloy and cast high temperature alloy Classification according to the matrix elements, high temperature alloy is pided into iron, nickel base, cobalt base and other high temperature alloy. Scope of application: General for aero engine manufacture of resisting high temperature materials, especially jet engine last two stage compressor and first two stage turbine blades, a combustion chamber, afterburners, manufacture of turbine disc, turbine blades and fasteners. Is an important strategic material, the aviation powers are under the condition of extremely confidential. Advantages: high temperature alloy should has high creep strength and creep rupture strength (see creep), good thermal fatigue and mechanical fatigue properties (see fatigue), good resistance to oxidation and corrosion resistance of gas and stable organization, which the creep strength and creep rupture strength is most important. The properties of high temperature alloy are closely related to the microstructure of the alloy, and the microstructure is controlled by the heat treatment of the metal. High temperature alloy is generally required after heat treatment. Solution treatment and aging treatment of precipitation strengthened alloy. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

  • The advantages of duplex steel

    The advantages of duplex steel mainly have the following points: (1) with good corrosion resistance, its wear resistance and corrosion resistance are better than that of austenitic stainless steel. (2) enough plastic toughness needed for forming. The use of duplex stainless steel production tank or pressure vessel wall thickness, is conducive to reduce costs. Has excellent resistance to stress corrosion cracking ability, even the lowest duplex stainless steel alloys containing higher resistance should be the ability of stress corrosion cracking, especially in chlorine ion in the environment. In Xu (3) the elongation rate of ferrite phase of the duplex steel is smaller than that of the austenitic phase, so the bending radius of the 2205 phase is larger than that of the austenitic stainless steel. (4) the linear expansion coefficient is low, and the carbon steel is close to, which is suitable for the connection of carbon steel, and has important engineering significance, such as the production of composite plate or lining. (5) under the condition of dynamic or static load, there is a higher energy absorption capacity, which is to deal with unexpected accidents such as collision, explosion, etc., the advantages of duplex stainless steel is obvious, it has practical application value. (6) external anticorrosive coating repair system refers to the tube Daowai anticorrosion layer construction caused by local damage and handling and other factors caused by the damage of modifications, including pipe joint outer anti-corrosion layer construction and damage of repair. (7) duplex steel is allowed to be used in the ASME boiler and pressure vessel code at temperatures below 316. The strength can be obtained through the ASME boiler and pressure vessel. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

  • Stainless steel rectangular pipe

    Stainless steel rectangle pipe is a hollow strip steel pipe, a large number of used for conveying fluid pipe, such as oil, natural gas, water, gas, steam, etc., in addition, doing bending and torsional strength phase at the same time, the weight is lighter, it is widely used in the manufacture of machinery parts and engineering structures. Also commonly used for the production of various kinds of conventional weapons, barrel, shells, etc. The classification of the stainless steel pipe: Stainless steel pipe is pided into seamless stainless steel pipe and welded stainless steel pipe the two broad categories. According to the cross section shape and can be pided into the stainless steel pipe and stainless steel special-shaped pipe, widely used is stainless steel pipe, square, rectangle, semicircle, but there are also some hexagonal, equilateral triangle, octagonal stainless steel special-shaped pipe, etc. For fluid under pressure stainless steel pipes are hydraulic experiment was carried out to test the compression ability and the quality, under the pressure of regulation does not leak, soaked or expansion of qualified, some stainless steel pipe according to the standard or the buyer requires edge test, flaring test, flattening test, etc. Stainless steel rectangular pipe, is made from solid pipe ingot or the perforation capillary, then through hot rolling and cold rolling or cold dial. Stainless steel rectangular pipe specifications: 5 * 5 ~ 150 * 150 mm thickness: 0.4 ~ 6.0 mm Rectangular pipe material: 304, 304, TP304, TP316L, 316 l, 316 l, 316 ti, 321, 347 h and 310 s Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

  • The Material and Purposes of Stainless Steel Flanges

    With different materials and raw materials used in the production process, flanges can have different values and functions in the industry to satisfy the perse needs of users. Materials of stainless steel flanges: stainless steel flanges are made of stainless steel (304, 304L, 316, 316L, 321), 16MN, Q235 and A106. In the process, you need to add some special raw materials to ensure the tees are with good functions. D, 5D, 6D bends, alloy elbows, stainless steel elbows, alloy pipes, reducing tees and other materials can also be customized to customers’ requirements. Made of different materials, stainless steel flanges can have different sizes and models. Also, in order to be adapted to different industries, they could be produced with different scales. Because of their relatively smooth surface, good aesthetics and texture, stainless steel flanges will provide users with good satisfaction. Purposes of stainless steel flanges: stainless steel flanges are widely used in petroleum, chemical, nuclear power plants, food manufacturing, construction, shipbuilding, paper, pharmaceutical and other industries. With different functions of different industries, the value of stainless steel flanges have been fully demonstrated.

  • The function and method of coating of steel pipe

    Steel pipe coating is an anti-corrosion coating to prevent the corrosion and damage of steel pipe during storage and transportation. In this case, In the past, steel pipe was artificially drawn with black asphalt paint. This work not only requires a lot of labor, but also occupies a considerable area of ​​the plant. In addition, due to the opaque asphalt coating, the user is difficult to see the surface conditions of the steel pipe. At the same time, the work of the printed label must be carried out after the coating is dried. Although electrostatic spraying equipment and high-pressure spraying equipment were introduced later, there were still many problems during use, such as long drying time, environmental protection and corrosion resistance. In this case, Therefore, China has done a lot of research and development work in this regard, the paint, the manufacturer has developed a translucent transparent water-soluble quick-drying coating for spraying steel pipe. In addition, a new automated device with high pressure spray and paint recovery has been developed to meet manufacturing requirements. For the technology, steel preheating spraying technology (IF) with good safety, high quality coating and clean surrounding environment has been developed.

  • SteelFab 2017

    SteelFab 2017The Middle East Trade Show for the Metal Working, Metal Manufacturing and Steel Fabrication IndustryDate: 1/16/2017 – 1/19/2017Venue: Expo Centre Sharjah, Sharjah, United Arab EmiratesConcurrent Expo: Fasteners World Middle East 2017 – The Middle East Trade Show for Fasteners & Fixing TechnologySteelFab is the most-attended and highly anticipated trade fair that caters to the regional metal working, metal-manufacturing and steel fabrication industry. Every January, global attention shifts to Expo Centre Sharjah, with the convergence of major regional buyers and international manufacturers in the steel fabrication industry for SteelFab. SteelFab enjoys the status of the most exclusive and largest trade fair of its kind in the region and has found favour with manufacturers and dealers from across the world for being a highly reliable and dedicated platform. For those seeking easy access to the fast-growing Arab economies as well as the existing and emerging markets in the entire Middle East and Africa region, the Indian sub-continent and Central Asia, SteelFab is a gateway that facilitates seamless trade.  Event news: Website: http://www.steelfabme.com/Future Dates:SteelFab 20182018-1Sharjah, United Arab EmiratesVenuesExpo Centre SharjahP.O Box 3222, Sharjah, Sharjah United Arab Emirates Tel: +971-6-5770000 http://www.expo-centre.ae/OrganizersExpo Centre SharjahP.O Box 3222, Sharjah, Sharjah United Arab Emirates Tel: +971-6-5770000 http://www.expo-centre.ae/

  • AMM’s Mexican Steel Forum 2017

    AMM’s Mexican Steel Forum 2017AMM’s 21st Mexican Steel ForumDate: 2/1/2017 – 2/2/2017Venue: InterContinental, Cancun, MexicoAMM’s 21st Mexican Steel Forum will be returning to Cancun for a third year in January 2016. The conference is a long-established date in the Mexican steel calendar for members of the steel industry from across North and Latin America and continues to provide a combination of insightful presentations and high quality networking opportunities. As the industry becomes more volatile in the face of the drastic changes to world steel dynamics over the last year it is more crucial than ever to keep up to date with the latest trends in Mexico, connect with clients, and make new contacts.  Event news: Website: http://www.amm.com/events/mexican-steel-forum/details.htmlVenuesInterContinental Presidente Cancun Resort HotelBlvd Kukulcan Km 7.5, Hotel Zone, Cancun 77500, Cancun Mexico Tel: +1-305-774 0040 http://www.presidentecancun.com/OrganizersAMM – American Metal Market EventsNestor House Playhouse Yard, London, EC4V 5EX, London United Kingdom Tel: +1-212-901 3828 http://www.amm.com/events

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