Finned Tube----Screw thread tube heat exchanger

Finned Tube----Screw thread tube heat exchanger

http://www.ts-aceroinoxidable.com/tsaceroinoxidablecom/html/down/finnedtube14.html

Screw thread tube heat exchanger is a new energy-efficient heat transfer equipment  introduced  in recent years, which is designed to completely break through the traditional shell and tube heat exchanger design ideas, choose from materials to structure, shape size, etc. with the traditional shell and tube heat exchanger has a substantial change compared to a number of technical innovations so that heat from the exterior to the various aspects of performance significantly beyond the traditional shell and tube heat exchangers , heat exchanger has changed the traditional simple structure , bulky , rough shape , inefficiency features, is the traditional heat exchanger replacement products.

1. Screw thread tube heat exchanger technology advantages

At present, heat transfer equipment industry technology updates slower, longer product replacement cycle , the manufacturers have generally invested in R & D is low , the manufacturers of the product are mostly imitate each other , resulting in product homogeneity is more prominent.

Screw thread tube heat exchanger heat transfer coefficient from the most important feature of its ultra-high, generally 2-3 times that of conventional shell and tube heat exchanger , along with better energy efficiency , with the traditional shell and tube heat exchangers is compared to more than 10% energy saving .

Outside screw thread tube heat exchanger also changed the image of the traditional extensive heat exchanger shell from the cylinder to the flange , all made ​​of stainless steel material , the outer surface of the heat exchanger to make mirror polished , beautiful and greatly improved .

Screw thread tube heat exchanger advantage also comes from its size and weighs only a fraction of the traditional shell and tube heat exchanger , the installation process is no longer the need for complex tools and lifting equipment, labor to complete.

The heat resistance due to the larger tube is not suitable for low pressure steam source and water / water heat exchanger conditions.

2. Screw thread tube heat exchanger structure

Screw thread tube heat exchanger consists of two parts consisting of a core and a shell , the core is mainly composed of tubes , shell composed by the barrel and closed top , head down , each with two openings , with the head of an center opening angle of 90 ° , so that all involved in heat exchanger , no dead zone .

3. Screw thread tube heat exchanger applications

Screw thread tube heat exchanger with high efficiency heat transfer performance, steam - water heat exchanger excellent field performance , widely used in HVAC and domestic hot water side, while on the cryogenic unit also has outstanding performance in the chemical and pharmaceutical and achieved a wide range of applications .

4. Advantages of screw thread tube heat exchanger

( A ) high- thread spiral tube heat exchanger thermal efficiency , more energy ( steam ) savings :

Internal unique reverse winding, spiral coil structure to countercurrent heat exchanger , the steam is condensed in the tubes can be fully beam , without going through a secondary heat exchanger , it can save a lot of steam ;

(B ) screw thread tube heat exchanger is stainless steel welding , high temperature high pressure :

As the screw thread tube bundle heat exchanger tubes and all stainless steel casing , with a uniform coefficient of expansion , its highest pressure 1.6MPa, the maximum temperature of 400 ℃, not due to pressure and temperature instability caused by heat 's deformation ; without pressure reducer .

The general volume of heat exchanger is generally made ​​of carbon steel shell , copper tube . Because the material is not the same so different coefficients of expansion , with the expansion and contraction easily crack in the weld of the tube . Coupled with mostly floating coil type , coil constant vibration , more broken pipe . Cause great trouble for the post- overhaul. Another low volume heat exchanger pressure , high temperature and pressure reduction pressures need to install the device , not only the initial investment cost increases , while the steam temperature and pressure reduction device will heat wastage.

(C ) screw thread tube heat exchanger compact, easy to install , small footprint

Screw thread tube heat exchanger small, save infrastructure investment ; light weight, ease of installation , the device can be directly connected to the pipeline , reducing installation costs.

Common bulky volume heat exchanger , typically 10 times the spiral tube heat exchanger thread , a larger area ; install complex and require prefabricated foundation, higher installation costs.

(D ) screw thread tube heat exchanger long life :

The use of screw thread tube heat exchanger Owen (OWEN) turbulence buffeting frequency standards principles, using the smallest gap beam tubes designed to effectively eliminate the turbulence buffeting phenomenon , extending the service life of the heat exchanger , spiral ribbed tube heat exchanger design life of up to 40 years under normal conditions of use , quality problems exchanger 8 year free repair or replacement.

While The general volume of the heat exchanger can only use about five years.

(E ) screw thread tube heat exchanger fouling tendencies low , low maintenance costs

Screw thread tube heat exchanger unique internal structure , unique countercurrent heat exchange surface treatment technology and media on both sides , at the same time improving the overall heat transfer coefficient to ensure that the heat exchanger has a self-cleaning function , low fouling tendency . Also, to ensure the stability of the system , our company with a stainless steel heat balancer , can ensure that the temperature is stable. Even after long-term use of fouling phenomenon , we only use chemical cleaning methods to clean the heat exchanger , time-saving , labor-saving , low cost , good effect .

In contrast, volume heat exchanger requires periodic inspection , conduct a visual inspection at least annually , at least once every three years, internal and external inspection, maintenance workload, high maintenance costs. Especially when the tubes appear broken crack pipes and tubes , the tubes need to be drawn overhaul , which must provide space for a large overhaul tube out . Causing great inconvenience for the overhaul .

( Six ) screw thread tube heat exchanger can be adjusted according to actual usage temperature, and volumetric heat exchanger temperature not higher than the limit value terminal , otherwise it will accelerate the scaling, increase the maintenance workload.

( Seven ) screw thread tube heat exchanger energy saving and environmental protection:

Screw thread tube heat exchanger tube heat medium walk , walk refrigerant shell , cold pack to maintain the flow of heat exchanger itself is dry, does not affect the ambient air . Coupled with heat exchangers and heat balancers are made ​​of stainless steel sanitary grade high temperature sterilization regularly .

Volumetric heat exchanger is because both the water storage tank , and its warm, moist environment to create the conditions for microbial growth , easy to produce a large number of bacteria that can cause infection and inflammation , causing indoor secondary pollution, the threat of human health.

Finned Tube----High Pressure Air Cooler

Finned Tube----High Pressure Air Cooler

http://www.ts-aceroinoxidable.com/tsaceroinoxidablecom/html/down/finnedtube13.html

( A ) High-pressure air coolers work expertise and material selection

( 1 ) High-pressure air coolers function and work environment characteristics

After the hydrogenation reaction products by high-pressure heat exchanger 3-5 from the reactor effluent reaches the high pressure air cooler, where it is further cooled , the temperature is lowered to about 50 ℃. Then enters the high pressure separator liquid separation .

Work is characterized by high-pressure air cooler : normal operating temperature is not high (200 ℃ or less ) , but in cases of emergency venting , there will be a lot of hot gas without adequate heat (> 200 ℃) in a short time through the air cooler . Thus requiring finned tube air cooler has good impact resistance.

( 2 ) Material selection high-pressure air coolers

When the media into the air cooler temperatures generally has dropped below 200 ℃ . At this temperature , the hydrogen has no significant corrosion of carbon steel for general effect , so most of the high-pressure air cooler tubes are carbon steel timber . Hydrogen corrosion is hydrogen at high temperatures cause long-term damage accumulation process of steel. So even if there are short-term high-temperature ( > Red D ℃) and gas through the air cooler ( emergency venting ) , nor will it pose a threat to carbon steel tubes . But some hydrogenation process there will be some action in warm air cooler , its normal operating temperature greater than 240 ℃. At this point can not resist hydrogen corrosion of carbon steel . Thus should be selected anti- corrosive hydrogen to produce better CrMo steel tube box and base tube . But in the harsh conditions of the air-cooled tube boxes and tubes , some foreign companies , such as the use of duplex stainless steel or corrosion Incolloy825 stronger material.

(B ) The characteristics of finned tube air cooler and Scope

Five typical finned tube shown in Figure 5-4-6 . Due to the different processing methods of these five finned tube , so that the extent of snapping finned tubes with different groups , resulting in different gap thermal resistance , resistance to thermal fatigue is different , the ultimate long- term operation of the heat transfer performance is decreased after different degrees . To make the finned tube heat transfer performance can still maintain good long-term use , countries regulate temperature limit use different kinds of finned tubes made ​​provision . China's " air-cooled heat exchanger " standard GB 15386 finned tubes specified in the maximum temperature in Table 5-4-3 .

Table 5-4-3 maximum temperature of various forms of finned tubes 

Form of Finned tube	L type finned tube	LL type finned tube	KL type finned tube	Bimetallic extruded finned tube	G type embedded finned tube
Maximum temperature/℃	150	170	250	280	350

The so-called thermal fatigue is what we often see the fins loose on the base tube . Air cooler fins to increase the surface area for heat transfer tubes and settings. Finned aluminum for good heat transfer performance is because of aluminum , and has good ductility , ease of molding . As the name suggests , wound finned tube is wrapped around the aluminum fins on the outside pipe. In order to further strengthen the snapping of the aluminum fins and base pipe and aluminum fins wrapped roots in extrusion knurled to form a knurled wound finned tubes (KL type ) . The aluminum cover on the base tube , aluminum tube from the outside with a mechanical compression methods , while forming fins , while the aluminum rolling on the base tube , rolling it into a bimetallic finned tubes . On the base of the groove pipe processing , and then the aluminum fins inserted and fixed in the recess , the finned tube can be obtained mosaic . This manufacturing process requires special equipment .

 

Aluminum fin molding process is relatively simple, cost is not expensive. However, due to the expansion coefficient of steel is larger than that of aluminum (150 ℃ , the carbon steel as 11.88x10-6mm/mm ℃; aluminum 23.94x10-6mm/mm ℃). When the heated aluminum fins , aluminum fins expanded volume, and a relatively small amount of expansion of steel , which makes the aluminum fins and a gap between the base steel pipe to increase . Ideally, after cooling aluminum fins and the gap between the steel substrate tube should be restored to its original working state. However, research and practice show that this gap can not be fully restored to its original working state. Especially after repeated thermal cycling , which is opened after several stoppages , aluminum fins with large gaps between the base steel pipe will be retained. Especially when an emergency venting device , there will be a lot of high temperatures without adequate heat and gas (> 200 ℃) quickly through the air cooler , the greater the impact of this heat to harm finned tubes , aluminum fins and steel the gap between the rapidly expanding base tube (resulting gap increased thermal resistance ) , and even loose , so that the heat transfer efficiency. If a finned tube after repeated thermal cycling , thermal gap decreased much , then it 's a good thermal fatigue resistance .

Thermal fatigue performance of the best mosaic finned tube , followed by : Bimetallic rolling finned tubes with knurled wound finned tubes, double L-shaped wound finned tubes, finned tubes ordinary wound . Due to the different processing techniques and costs, which are five common finned tubes finned tubes mosaic is also the most expensive , while the cheapest is the common wound finned tubes . Therefore, you should use the occasion , to select the appropriate operating temperature , more economical finned tubes .

Air-cooled with a high-pressure hydrogenation unit 's normal operating temperature is about 150 ℃. But when an emergency venting device , there will be a lot of high temperatures without adequate heat oil ( greater than 200 ℃) huge thermal shock quickly through the air cooler, to the finned tubes . Coupled with the annual open stoppage caused great impact on the gap finned tube heat resistance . If you use an ordinary wound finned tubes, after several cycles of operation , will produce the phenomenon of cold is not down , as well as affect the operation of downstream equipment . Therefore, the current high-pressure air coolers generally use double metal rolling finned tube . This is because the bimetallic finned tube rolling long-term operation in the following 200 ℃, maintain good heat transfer performance , but also short-term resistance higher than 200 ℃ thermal shock , and affordable , ranging from wound finned tubes and mosaic between finned tubes .

Tests show that the thermal fatigue properties of extruded bimetallic finned tube significantly better than LL -type wound finned tubes . That is, after a few stoppages or emergency vent opening , the contact resistance bimetallic finned tube rolling increment is small, the heat transfer performance degradation is small. Therefore , bi-metal rolling finned tubes in the reaction product of hydrogenation unit air cooler , you can make use of the device after a long period can still maintain good heat transfer performance. 

Aluminum----5754 aluminum sheet

Aluminum----5754 aluminum sheet

http://www.ts-aceroinoxidable.com/tsaceroinoxidablecom/html/down/aluminum3.html 

5754 aluminum alloy with moderate strength , good corrosion resistance , weldability and ease of processing forming characteristics such as Al-Mg alloy typical alloys. At abroad, 5754 heat-treated aluminum plates of different states  are main material used in in the automotive industry ( car door , dies , seals ) and canning industry .

Applications
5754 aluminum is widely used in welded structures , storage tanks, pressure vessels , marine structures and offshore facilities , transport tanks and for requiring excellent processing performance, excellent corrosion resistance, high fatigue strength , weldability and high static strength of the medium occasions.

Aluminum surface
1, the surface does not allow cracks, corrosion spots and traces of nitrate .

2, allow the surface defect site where the depth does not exceed the nominal wall thickness of 8% from the size of the skin , bubbles, surface roughness and local super mechanical damage , but can not exceed the maximum depth of defects 0.5mm, the total area of ​​the defect does not exceed the total area of ​​the plate 5% .

3, allowing supply to the lighting along the longitudinal profile smooth surface .

4, Other requirements: demand-side and supply side to develop their own

Chemical composition
Si Si: 0.40;

Copper Cu: 0.10;

Mg Mg: 2.6 ~ 3.6

;Zinc Zn: 0.2;

Manganese Mn: 0.50;

Chromium Cr: 0.30;

Iron Fe: 0.40;

Al Al: margin .

Single: 0.05 .

Mechanical Properties
Tensile strength σb (MPa): 165 ~ 265.

Aluminum national standard (GB / T 3880-2006), uniform standards applicable to aluminum strip material.

Heat Treatment
1 ) homogenizing annealing : heating 440 ℃; insulation 12 ~ 14h; air cooling.2 ) rapid thermal annealing : heating 350 ~ 410 ℃; holding time 30 ~ 120min; air or water.3 ) high-temperature annealing : heating 350 ~ 420 ℃; finished thickness ≥ 6mm or <6mm, the holding time of 2 ~ 10min or 10 ~ 30min; air cooling.4 ) Annealing: 250 ~ 300 ℃ heating or 150 ~ 180 ℃; holding time is 1 ~ 2h, air cooling.

5754 Aluminum available from stock
Aluminum sheet size:

Thickness : 3mm, 4mm, 6mm, 8mm

Width : 1000mm \ 1220mm \ 1500mm

Length : 2000mm, 2440mm, 3000mm, 6000mm

Aluminum standard size : 1220 * 2440mm

Aluminum rod specifications :

Diameter : 3.0mm-500mm

Length : 2000mm-6000mm

Rod standard size : 2500mm

Diameter : 0.1mm-20mm

Length: If 0.1mm * c ( plate line )

Aluminum standard size : 10KG-200KG

Stainless Steel----Antimicrobial food grade stainless steel

Stainless Steel----Antimicrobial food grade stainless steel 

http://www.ts-aceroinoxidable.com/tsaceroinoxidablecom/html/down/aceroinoxidable13.html 

Antimicrobial food grade stainless steel meaning: in the production of kitchen equipment, medical equipment , toiletries and cleaning decoration , people have been looking forward to a new material which have both structural and functional properties, also antimicrobial capacity .

Both structural and functional properties of the new material - both antibacterial stainless steel mechanical properties of structural materials , functional materials have physical and chemical properties, it is like that with stainless steel trim and generally beautify the role as a member , as well as antibacterial , self-cleaning effect of sterilization .

1 , Antibacterial stainless steel profile

Antibacterial stainless steel , is the added amount of the antibacterial metal elements Cu, Ag, Zn and other elements in a common stainless steel. SUS304J1, SUS 304J2, 430J1L, 411SS and treasure and other antibacterial antibacterial stainless steel requirements are met in terms of chemical composition .

2 , Introduction of antibacterial stainless steel

1) SUS304J1 stainless description : SUS304J1 There are two branches of stainless steel , a nickel content of about 7.5% of the market , another nickel content of about 6.2%. Copper content of which were more than 2.0%.Stainless steel introduction : SUS 304J1Compared with ordinary SUS304J1, low nickel content of nickel 304J1 dropped to about 6.2% , the other element content has not changed much .

2) SUS 304J2 Introduction Stainless steel introduction : SUS 304J2

3) 430J1L Introduction : 430J1L is a ferritic stainless steel , 430 Cr content higher contrast , adding Cu, Nb, another lower C, N amount .Stainless steel description : 430J1L

4) 411SS steel description : 411SS 410S lower C content on the basis of increased Cu.Stainless steel description : 411SS

5 ) Antibacterial treasure Description: Antibacterial treasure Baosteel in 2009 in the newly developed steel , which is equivalent to JIS standard of SUS304Cu. Compared with SUS304, increased copper content of about 1% , to increase the antibacterial stainless steel .

Types of antimicrobial food grade stainless steel : produced by antibacterial divided into two types: type and their antimicrobial coating type antibacterial stainless steel. The former can transform existing stainless steel products, namely metal plating on stainless steel material with a germicidal or bactericidal effect of other inorganic materials , but the drawback is easy to wear, easy to aging , with the temperature changes and the external environment and changed so that the loss of the antibacterial stainless steel ; the latter is added during the production of stainless steel metallic element has an antibacterial effect , and then make a special treatment by itself antibacterial stainless steel , it is not the former disadvantages , and low cost, easy to processing.

1 , Antibacterial stainless steel applications :

( 1 ) dining utensils and kitchen supplies ;

( 2 ) Medical Devices ;

( 3 ) food processing equipment ;

( 4 ) pharmaceutical equipment ;

( 5 ) dairy processing equipment ;

( 6 ) Sanitary facilities ;

( 7 ) regular contact with staff and other public facilities .

2 , Antibacterial stainless steel market analysis

At present, China 's annual output of about 10 million tons of stainless steel , of which 70% is plate. It is understood that only Guangdong, with an annual output reached 2.4 million tons of stainless steel sheet , mainly for the production of food utensils , sanitary equipment and household hardware products. Even antibacterial stainless steel can occupy its 10% share , sales volume can reach 60-70 billion, the market prospect is extremely impressive.Currently there is no domestic production and application of antibacterial stainless steel and their products , in addition to Japan have been reported abroad but so far no commercial products to market . Because now mastered the key antibacterial stainless steel production technology, with all the intellectual property , occupies a leading place in the country , at least not encounter strong competition in recent years . Develop antibacterial stainless steel and its products, economic significance.

3 , Antibacterial stainless economic analysis

Antibacterial stainless steel industrial production cost forecastIncrease a ) the cost of raw materialsFor the ferrite and austenite two types of antibacterial stainless steel , are only a small amount on the basis of the original stainless steel components as antibacterial alloying elements Cu , stainless steel compared with the original , raw material costs very little ( less than 3% ) , while smelting , thermal processing , cold and other processes unchanged.2 ) anti-bacterial heat treatmentTwo types of antibacterial stainless steel were needed in the final heat treatment antibacterial , if the establishment of a semi-continuous vacuum heat treatment equipment, increase production costs per ton of not more than 7%.3 ) antibacterial stainless steel industrial production costsIn summary, antibacterial stainless steel under conditions to achieve large-scale production , compared with the original stainless steel (0Cr17 and 0Cr18Ni9), increased production costs will not exceed 10 %. While the addition of antibacterial function , increase product prices will certainly be higher than 10% , such as price antibacterial fabrics, antibacterial ceramic , antimicrobial coating materials and other antibacterial products than the corresponding original increase of 25 % or more .Antimicrobial food grade stainless steel applications : Currently the field of materials for the " sterilization" and "antibacterial" there is no clear definition. Antibacterial generally understood to inhibit bacterial growth , growth and reproduction , sterilization is to kill microorganisms. Antibacterial stainless steel can not make it on the adhesion of the bacteria multiply , the bacteria are killed or inhibited in a low level state, but does not change the intensity of ordinary stainless steel , corrosion resistant , beautiful features, has a very broad application prospects . Look forward into people's homes. 

Seamless Hydraulic Tube----Thin-wall stainless steel water pipes

Seamless Hydraulic Tube----Thin-wall stainless steel water pipes

http://www.ts-aceroinoxidable.com/tsaceroinoxidablecom/html/down/hydraulictube2.html

Thin wall stainless steel water pipes----- safe, clean , sanitary , and durable

Mainly used for water transport , drinking water is the best immediate delivery pipe. It has a very low leakage rate , you can save valuable water resources characteristics. After the last century eighties when the pipe leakage rate is about 17% , instead of stainless steel pipe leakage rate to 7%. Water supply systems in the earthquake destroyed, but the stainless steel plumbing system was intact. In addition , compared with copper pipes, stainless steel pipes through good water under high flow rate without corrosion. It 's also a brass insulation 24 times .

1. The Advantage of thin wall stainless steel water pipes

01 | Health Health Healthfulness |

Stainless steel is the material can be implanted in the body's health , so the water pipes , the pipes are made ​​of stainless steel the most favorable health. Water immersion test , the indicators are in line with national requirements for drinking water standards . Stainless steel pipe wall is smooth , long-term use will not fouling , easy to stain bacteria , without worrying about water quality are affected, more to prevent secondary pollution of water.

02 | Selection stress Selected Materials |

All raw materials used in grades 304,304 L, 316,316 L, are in line with JIS4305 requirements. Above grade with stable performance, high strength, low coefficient of thermal expansion .

03 | durable Durability |

Chromium-rich oxide film on the surface of the stainless steel thin, dense , so that all the water quality , including stainless steel pipes , including the softener has good corrosion resistance , even when buried underground have excellent corrosion resistance ; field corrosion test data indicate that the stainless steel pipes the life of up to 100 years , virtually no maintenance during its life cycle , avoiding the expense and hassle of replacing the pipes , integrated use of low cost.

04 | high temperature , high pressure High Temperature And Pressure Resistance |

Stainless steel can work long-term security at a temperature of -270 ℃ -400 ℃ , whether high or low , will not precipitate harmful substances, materials performance is quite stable ; stainless steel pipes tensile strength greater than 530 N / mm, and has a good extension resistance and toughness. High strength stainless steel pipes , greatly reducing the possibility of leaks by external influence , significantly reducing water leakage rate , effective protection of water resources and utilization .

05 | Energy saving Environmental Care |

Smooth wall stainless steel pipe , water resistance is very small , the pressure loss is reduced , reducing the transportation costs . Due to the low coefficient of thermal expansion of stainless steel in the hot water pipes effectively reduce the heat loss . Stainless steel is 100% renewable material can not cause pollution to the environment.

06 | Use a wide range of Wide-used |

Stainless steel tube can be used in cold water , hot water, drinking water, air , gas, medical gas , petroleum, chemical , water treatment and other piping systems.

07 | economical Cost Saving |

Since its invention in the 20th century mankind stainless steel , stainless steel has been the material of the ordinary . Currently in cost performance in a variety of materials pipes , stainless steel pipes are the best . This superiority corrosion resistance, high strength , impact resistance and other stainless steel materials can be related. The same can be said of its useful life and the life of the building . An investment, a lifetime benefit , is a " once and for all ."

2. Thin wall stainless steel water pipes connections

1 , squeeze connection --------- radial contraction force ( hydraulic clamp ) will pipe clamp on the pipe and through the O-ring seal , to connect effect. Connection strength is low ( less than the strength of the interface connecting pipe strength 1 / 3 ) , the pipeline is not removable ; burr pipe port deburring net will not damage the apron, the risks of a future leaks .

2 , connected to the expansion ring contraction --------- radial force ( hydraulic clamp ) the tube clamp on the pipe and the sealing ring through the broadband glue , to effect the connection , removable tube installation increase the pipe ends protruding ring rolling process ; higher cost of casting pipe , the interface strength is better than compression type .

3 , welded connections --------- using hot-melt process, the two splice connector , to effect connection. High bonding strength , weld seam gas site protected difficult standard , resulting weld rust, directly reduce the life of the pipeline ; installation quality dependence on welding technology workers , the quality is difficult to stabilize

4 , new connections ---------- typically a self-locking retainer mating connector , is one of the most convenient method of construction . Simple operation, construction workers just familiar with its operation requires , a little practice to master. When connecting pipe cut end should be perpendicular to the tube axis , burrs inside and outside the incision should be clean , and with a marker on the outside of the front brass marked the depth to be inserted , and then force the brass insert fittings in the end to a tube stop can be.

(1) simple to install, no threading or rely on the wall thickness of pipe connections , and to avoid the difficult control of human factors ;

( 2 ) has a saving labor, time, materials , tools province , provincial venues , environmental protection , sustainable use , and many other advantages

( 3 ) Install a low risk for a variety of installation environments , reusable , environmentally friendly energy ;

( 4 ) does not leak , shockproof , anti- thermal expansion and contraction , safe, durable and reliable

3. Category of thin wall stainless steel water pipes

1 , according to the production method of classification :

( 1 ) seamless tube - cold drawn tubes, squeeze tubes, cold-rolled tubes .

( 2 ) welded pipe :

(A) classification by technology - gas pipes , arc welded pipe, ERW pipes ( high-frequency , low frequency ) .

(B) the weld points - longitudinally welded pipes, spiral welded pipe .

2, according to the wall thickness of classification - thin-walled steel pipe, thick wall steel pipe

3 , Material Category:

( 1 ) 304 thin wall stainless steel water pipes ;

(2) 304L thin wall stainless steel water pipes ;

( 3 ) 316 thin wall stainless steel water pipes ;

(4) 316L thin wall stainless steel water pipes ; 

Stainless Steel----Stainless Steel Straight Bar

Stainless Steel----Stainless Steel Straight Bar

Stainless steel straight bars square measure hot-rolled by stainless-steel billets. Straight bars may be created into peeling bars via the tempering and peeling method. to boot, Cold drawn bars may be created by stainless-steel wire rods or hot-rolled pickling bars by the means of cold drawn method, together with spherical bar and numerous formed bars. The product square measure processed by downstream partners for the utilization in computers, pc peripherals, industrial / ship shaft components, chemical and medical elements.

Manufactures a spread of straight bars that includes top quality, stability, outstanding straightness, high exactitude and glorious cutting. additionally to the common spherical bars, also provide each sq. and polygonal shape cold drawn bars, is that the leading provider of stainless-steel straight bars within the world. the first product showing as follows:

Peeled Bar:

Peeling bars square measure created by the machining manufacture, that has the upper stability, outstanding material strengthens, unvaried structure, and precise straightness/sizes. The sizes of spherical peeling bar in Hsinchuang square measure 19-65 metric linear unit, utilized in the machining method of shafts, cast things and valves, etc.

Cold Drawn Bar:

Cold drawn bars have the outstanding options of accuracy, straightness, surface, cleanness and safety. Besides, the various styles of soft/hard material product may be designed by the client demands.

Cold Drawn formed Bar:

The cold drawn formed bars embody sq. and polygonal shape bars. the dimensions vary of polygonal shape bar in Hsinchuang is four.46 - sixty five metric linear unit and size vary of sq. bar is four.76 - 38.1 mm.

Product Specification Stainless Steel Straight Bar 

Production Process

Peeling Bar

Stainless Steel Billet→Reheating Furnace→HRM 200→Intermediate 3-roll Block→Pre-finishing 3-roll Block→Hot-rolled Straight Bar→Annealing→Straightening→Peeling and Reeling→Peeling Bar

Cold Drawn Bar/CG Bar/Polishing Bar

Stainless Steel Wire Rod→Straightening→Sanding→Coating→Straightening→Cold Drawing→Finishing Straightening→Cutting→Double Roller Straightening→Cold Drawn Bar →CG Bar →Polishing bar

Cold Drawn formed Bar

Peeling Bar→Port Pay→Sandblasting→Coating→Cold Drawing→Straightening→Polishing→Cold Drawn formed Bar (Hexagon, Square, Oval)

Finned Tube----Specific classification of finned tubes

Finned Tube----Specific classification of finned tubes

Specific classification of finned tubes, there are lot of types of finned tubes, meanwhile also lot of new species comes up. Generally be classified according to the following aspects :

    1, According to the classification process

    1 ) , rolling forming finned tubes (extruded fin tube);

    2 ) , welded finned tubes ( high frequency welded finned tubes, submerged arc welded finned tubes ) ;

    3 ) , roll forming finned tube ;

    4 ), set forming finned tube ;

    5 ) , casting finned tube ;

    6 ) , the tension wound finned tubes ;

    7 ) , inserts the tube .

    2, According to the fin shape classification

    1 ) , square fin tube (Square finned tube);

    2 ) , round finned tube ;

    3 ) , spiral finned tube (spiral finned tube);

    4 ) , the vertical fin tube (Longitudinal Finned Tube)

    5 ) , corrugated fin tube ;

    6 ) , serrated spiral finned tubes (Helical Serrated Finned Tubes);

    7 ) , the needle finned tube ;

    8 ) , the overall plate- fin tube ( plate-fin ) ;

    9 ) , the finned tube (inner finned tube). And so on.

    3 , Depending on whether the finned tubes finned tube material and the same material can be divided into groups :

    1 ) , a single metal finned tube

    2 ) , bi-metal composite finned tube

    4 , a single metal finned tube Material Classification

    1 ) , copper finned tubes ;

    2 ) , aluminum finned tube ;

    3 ) , carbon steel finned tube ;

    4 ) , stainless steel finned tube ;

    5 ) , iron ( steel ) finned tube ; etc. .

    5 , By use classification

    1 ) , air conditioning with finned tubes ;

    2 ) , air-cooled with finned tubes ;

    3 ) , the boiler : finned water wall , economizer, air preheater tubes were used ;

    4 ) , industrial waste heat recovery with finned tubes ;

    5 ) , other special purpose finned tube ; etc. .