Helically Wound High Fin Tubes
'L' Finned Tube
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The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximising the heat transfer properties. The foot of the fin considerably enhances the corrosion protection of the base tube.
Maximum Working Temperature: 150â??
Atmospheric Corrosion Resistance: Acceptable
Mechnical Resistance: Poor
Fin Materials: Aluminum, Copper
Tube Materials: No theoretical limits.
'LL' Finned Tube
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Manufactured in the same way as the 'L' fin type except that the fin foot is overlapped to completely enclose the base tube thereby giving excellent corrosion resistance. This type of tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.
Maximum Working Temperature: 180â??
Atmospheric Corrosion Resistance: Acceptable
Mechnical Resistance: Poor
Fin Materials: Aluminum, Copper
Tube Materials: No theoretical limits.
'KL' Finned Tube
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Manufactured exactly as the 'L' fin except that the base tube is knurled before application of the fin foot. After application the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between the fin and tube resulting in improved heat transfer characteristics.
Maximum Working Temperature: 260â??
Atmospheric Corrosion Resistance: Acceptable
Mechnical Resistance: Acceptable
Fin Materials: Aluminum, Copper
Tube Materials: No theoretical limits.
'G' Embedded Finned Tube
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(Embedded Fin)The fin strip is wound into a machined groove and securely locked into place by back filling with base tube material. This ensures that maximum heat transfer is maintained at high tube metal temperatures.
Maximum Working Temperature: 450â??
Atmospheric Corrosion Resistance: Poor
Mechnical Resistance: Acceptable
Fin Materials: Aluminum, Copper, Carbon Steel
Tube Materials: No theoretical limits.
Extruded Finned Tube
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The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximising the heat transfer properties. The foot of the fin considerably enhances the corrosion protection of the base tube.
Maximum Working Temperature: 150â??
Atmospheric Corrosion Resistance: Acceptable
Mechnical Resistance: Poor
Fin Materials: Aluminum, Copper
Tube Materials: No theoretical limits.
U Bend And Finned Tube:
ACC (aluminum clad copper) tube
ACC tube has an outer layer of antirust 3003 aluminum alloy and inner layer of oxygen-free copper. The copper-aluminum interface achieves metals bonging among atoms, popular saying: metallurgy bonding. ACC tube combines the excellent moment decalescence capability of copper with the excellent heat-sinking capability of aluminum. Thus, ACC tube owns good heat-transmit performance, which can be widely applied in air conditioner, refrigeration, dehumidifier and so on.
The heat exchanger, adopting ACC tube, completely eradicates the electrochemistry decays between copper tube and aluminum of traditional heat-exchanger. Greatly reduces the recession of energy efficiency ratio, provides key material for making long-effect air conditioner, and saves more than30% purchase cost for manufacturer.
Over millions of air-conditioners have been put to market. Anti-corrosion and heat exchange performance can meet the requirements.
NOTE : All index and parameters achieve related standards after testing the air-conditioner made by ACC tube, which has run for over 5 years.
ACC tube basic performance
ACC tube weight ratio : CU/AL30/70
Volume Ratio : CU/AL10/90
Tension strength : 115Mpa
Elongation : 35%
Expanding : 40%
Density : 4.3
Nonferrous Metal Tube And Pipe:
High-strengthen Color Aluminum Tube (CAT) is composed of 3003 aluminum and high-strengthen aluminum nuts. No corrosion after 500 hour's standard salt spray test. After the trail by many air conditioner factories, it can be regarded as the most safe and reliable substitute for pure copper tube and electric resistance welded pipe which can reach the performance of air conditioner with lowest cost.
Product Details
Supported by a team of adroit and decimated professionals, we are providing high quality Ceiling Suspension System. The Ceiling Suspension Systems have demountable design and are capable of installing any tiles of size. Our suspension system are improved, eco-friendly, easy to install suspension systems feature corrosion resistance for interior environments. We are engaged in offering Ceiling Suspension System that is uniquely designed according to the industry standard of compatibility. These systems are valued by the clients for acoustical tile, light fixtures, air diffusers, seismic and fire resistive designs.
Features:
Corrosion resistance
Eco friendly
Easy to install
Item Length Height mm Width Thickness Max. Loading/m2
Main Runner 10'&12' 32/38 24/14 0.3 8.45 kg/m2(M.R.at 1.2c/c)
Cross T 4' 23/26/32 24/14 0.3 12.05 kg/m2(M.R.at 0.6c/c
Cross T 2' 23/26/32 24/14 0.3
Wall Angle 10' 20 22 0.4
All system components are made of roll formed hot dipped galvanized steel with zinc coating of not less than 120 gm/m2 & minimum tensile strength of 240 mpa.
Hot Tags: Plain Grid System,Ceiling Suspension System
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Heat Exchanger:
Shell & Tube Heat Exchangers
We design and manufacture a wide variety of shell and tube exchangers with styles defined by TEMA or variations thereof. We have extensive experience with carbon steel, high alloys and weld overlay materials to suit a wide variety of process requirements.
Size : Outside Diameter: 6 inches up to 192 inches
Length : 4 feet up to 100 feet
Weight : 2,000 lbs up to 500,000 lb
Materials
- Carbon steel
- Low Alloy (1.25 Cr, 2 Cr, 5 Cr, 9 Cr, 13 Cr)
- Austenitic 300 series stainless (304, 316, 317, 321, etc)
- Duplex stainless steels
- High alloy (600, 800, 825 series)
- C276
- Monel
- Brass, 70-30 Cu-Ni, 90-10 Cu-Ni
- Titanium (limited)
- Weld overlay (300 series, high-alloy)
Pressure
Atmospheric up to 6,000 psig (welding up to 5 inches thick)
Design
- HTRI Category III member
- Aspentech TEAMS, Compress
- FE/Pipe and Nozzle/Pro
- Customized software
- AutoCad, Inventor
- FEA ANSYS (sub-contracted)
Pressure Valve:
API Globe Gate Check Valve
Features: Bolted, Cover, Swing Type Disc, Threaded of Welded Seat Ring Body material: Cast iron, WCB, WC6, WC9, CF8, CF8M, CF3, CF3M Specification: Structure: BC, Swing Type Design standard: BS 1868 or API 6D Face to face: ASTM/ANSI B16.10 Flange ends:: ANSI B16.5 Welding ends: ANSI B16.25 Pressure test: API 598/API 6D
Features:
Bolted, Cover, Swing Type Disc, Threaded of Welded Seat Ring
Body material: Cast iron, WCB, WC6, WC9, CF8, CF8M, CF3, CF3M
Alloy Check Valves Application
Face to Face Dimensions : ANSI B16.10
Flange end Dimension : ANSI B16.5
Butt Welded Dimensions ANSI B16.25
Design and Manufacture BS1868
Pressure Test API598
Materials WC6 WC9 CF8 CF8M CF3 CF3M CN7M LC1
LC2 LC3 LCB LCC Monel 20# Alloys 4A 5A C95800 C95500, etc.
Class150 Alloy Check Valves
Machine Equipments:
Skiving And Roller Burnishing Machine
The product is an epoch-making revolution in the hydraulic maching equipment area, which owns several patents in innovation and design after elaborate development by our strong engineering team. It is mainly applicable in machining of hydraulic cylinder hole.
- It adipts international advanced compound machining techinics of boring and rolling.
- It's perfectly finished within one single to and fro simple movement.
- The machine adopts SIEMENS control system.
- Precision : grade IT8. Surface roughness: 0.20m.
- The machine advances effeiency by 15-20 times compair with triditional processing, it is unblievable to save time largely around 85%.
Forging Steel Products
Unidus forging factory has a complete production equipment and technology, a production capacity of 30,000 ton per year. Main products are petroleum machinery I IV type pressure vessel forging pieces for chemical industrypower stationshippingaviationnuclear power and all kinds of engineering machinery forgings. The shape of the products are: rotor shaftproducing all kinds of forging according to the standard of home and abroad, such as flangewellhead equipment and valves which are used in oil production equipment tube forging.
A broad range of forging materials GB standard carbon steelalloy steelheat resistance stainless steel and the ultra-low carbon stainless steel and so on. We also produced a batch of forging pieces according to the United States and the European standard material forgings. Has a mature production of A105 A266 A350 4130 4140 4340 F5 F11 F22 F51 F53 F91 F92 F304 L F316 L F321 L and other forgings according to the standard of ASME, ASTM.
Mature Europe standard products are mainly: S235 S355 16Mo3 C422 and other carbon steel alloy steel, stainless steel forgings according to the standard of EN10025 EN10083 EN10084 EN10250 EN10283 EN10088 EN10095 and so on.
With a significant feature of strong focus on researching to peer, in heat treatment section the company equip with micro-furnace, carry out experiment to new products and new materials then study its heat treatment process. At the same time, we cooperate with iron smelting company to study the Physical and Mechanical Properties of steel, reasonable mix of components. Especially for duplex stainless steel, super austenitic stainless steel, control and reasonable mix of components is very important, and it is crucial to structure control and mechanical properties.
After a long-term exploration research, in the field of nuclear power and aviation, there are special requirements for those special material, we have a lot of valuable experience in the process of forging and heat treatment.
In the forging process, after many years of trial practice, the company has formed a complete set of technical process from the raw materials, heating, forging to heat treatment. Especially the high-temperature alloy steel forging, our forging parts NiCr20TiAl, the content of Ni up to 65%, and its forging is very difficult. Now, the high-temperature alloy product forged by us has successfully taken place of imported products.
Steel Ball:
Hot Rolled Grinding Steel Ball
Grinding balls for steel grinding machines (hereinafter referred to as grinding steel balls) are a kind of medium used in the ball grinding mill to grind the materials therein. With an annual capacity of 500,000 tons, the grinding steel ball is mainly used in mines, with products exported to Southeast Asia, Australia, Africa, North America, Central and South America and other countries and regions. It has become one of the largest production bases in the world, with exported products reaching 95%. Longteng grinding steel balls occupy most of the global high-end application markets.
- High precision control of product quality
- Base metal production lines of the wear-resisting material adopt a full set of short-stress rolling mill produced by Danieli Group, Italy. The base metal is made through continual rolling to realize high precision control of product quality.
- Hot rolled steel balls are made from round steel produced by steel mills through hot rolling and with whole process automation control. The ball is uniform in hardness, with the heart having high hardness, being low in broken rate, and high in impact value.
Note :
1. Roundness: Spherical with little overfill or underfill within the national standard: GB-8649-88 and YB/T 091-2005
2. Metallographic structure: Substantially martensite with some retained Austenite, Bainite& Carbides
3. Breakage guarantee: -Nil breakages upon delivery
-Less than 1% in normal and correct operation conditions
Seamless Steel Tube:
Seamless Steel Tube Used In Drilling
Specification : OD20 - 108mm WT 1.5~20mm
Aplication : Geological core drilling,Water well drilling,Hydrogeology drilling,Engineering geological drilling,Engineering drilling casing material.
Technical features : Innovative system in cold rolling technology in production of seamless steel pipe used in drilling, the compactness of the higher and better toughness, can gretly improve the wear resistance of drillin gipe and resistance torque, make its service life longer.
Hot Tags : 37Mn 5 Tube Drilling pipes
Welded Steel Tube:
Drawn Over Mandrel Tubes
Drawn Over Mandrel Tubes (DOM) Drawn Over Mandrel tubes according to tubing manufacturing standards like ASTM A513 type-5 & -6 or equivalent to meet customers requirements. Drawn over Mandrel (DOM) can be an ideal choice where a high degree of dimensional accuracy is required.
Applications:
- Hydraulic cylinders
- Transmission shafts
- Steering Columns
- Suspension components
- Camshafts
- Axle Tubes
- Drive Shafts
- Jack Sleeves
- Bushings
Manufacturing procedure
DOM steel tubing is manufactured from electrical resistance welded hollows and cold drawn through a die and over a mandrel, improving surface finish, mechanical properties and dimensional accuracy of both outside and inside diameters. DOM is a high-quality, cost-effective choice for demanding applications and machined parts because of its special characteristics: Combined with reliable weld integrity, Maximum concentricity, and Minimal wall variation.
Advantages
- Improved Dimensional Accuracy
- Improved Physical Properties
- Improved Surface Finish
- Straightening, Complete Dimension, and Non-Destructive Inspection are Integral to the Process
- Lower Machine Costs
- Mass Savings in High Strength-to-Weight Ratio Applications
Standards
- ASTM A513 Type 5
- Drawn Over Mandrel (DOM)
- ASTM A513 Type 6
- Drawn-Over Mandrel Special Smooth ID (SSID DOM)
GR9 Titanium Seamless Pipe For Race Bike
When trying to pick a material for a bike frame, there are many really important material considerations; weight, stiffness, strength, toughness, impact resistance, ride quality, corrosion. We'll discuss all of these issues in the context of choosing a bike.
Permanent deflection
Permanent deflection, or plastic deformation as it is also known, is much higher in Titanium than other materials and accounts for its fabled â??springâ??. This is why a Titanium ride is so much more comfortable than other frame building materials.
Fatigue resistance
The inherent flexibility and high tensile strength of Titanium allows the energy stresses of regular use to be effectively dissipated without degradation of the material, ensuring Titanium frames stay stronger for longer.
Impact resistance
The high tensile, or ultimate, strength and low elastic modulus of Titanium combine to create unparalleled impact resistance, meaning Titanium frames can soak up much harder punishment than frames built from other materials.
Corrosion resistance
Titanium's natural coating of Titanium Dioxide prevents it from oxidising in the atmosphere, so it will never rust, unlike steel, and, unlike aluminium, it will not corrode when exposed to acidic or alkaline environments. So aesthetic and performance quality will never be compromised by the weather.
Strength to weight
The tensile strength to density ratio for Titanium outstrips every other frame building metal. Simply put, for the same weight frame, Titanium will be twice as strong as steel and three times as strong as aluminium.
Stiffness to weight
Rigidity is essential for efficient power transfer and Titanium's stiffness to weight ratio is superior to all other metals. Titanium combines low weight for easy climbing, high rigidity for blistering performance in the sprint and the perfect balance of both to deliver Titanium's legendary ride quality.
3 AL/ 2.5 V
All our frames are made from aerospace grade 3AL/2.5V Titanium, which contains 3% aluminium and 2.5% vanadium. This offers the perfect balance of strength and plasticity for use in thin-walled bicycle tubing.
Titanium Use
The 3Al/2.5V Titanium alloy we use was developed for use in high pressure hydraulic lines and is found on virtually all new military and commercial airplanes.
Type of Tubing
We use two types of tubing to make our frames: cold-worked, drawn, seamless tubing and seamless hydroformed butted. Both types of tubing create extremely strong, lightweight frames, but the seamless hydroformed butted tubing is even lighter and more durable. Only our very best bikes are made from this tubing.
