Product Description
ASTM A105 Threaded Flange TH Flange Thread flange steel thread flange forged
1. Our Products Range:
Welding Neck flange/slip-on boss flang/slip-on screw flange/thread flange /slip-on weld flange /lap joint flange/FF/RF/MF/TG/OSG/RJ
Standard: ASME B 16.5 /DIN 2631 DIN 2632 DIN2633/DIN2634/DIN 2635/AS2129/Table D table E/BS 10/GOST 12821-80 /JIS
Material: Alloy steel, carbon steel and stainless steel 304 316 CF8 CF8M ASTM A105N, ASTM A350 LF2, ASTM A182 F5, ASTM A182 F11, ASTM A182 F9, ASTM A182 F5, ASTM A182 F22/Titanium Gr1, Gr2, Gr3, Gr4, Gr5, Gr7, G9, Gr12
Size: DN10~DN4000
Pressure: PN2.5 PN6 PN10 PN16 PN25 PN40 PN63 PN100 150# 300# 600# 900# 1500# /class: 5K, 10K, 16K, 20K, 30K
DHDZ has more than 150 customers in the world, the famous ones are:
*ABB-Shaft; cylinder
*SIEMENS, -large size forgings 5M length shaft
*SINOPEC-flanges.
We were established in 1990 and have the experience in forging field more than 20 years, and now have 16000 M2 factory with 200 employees and ISO9001 & PED (TUV) had been passed, API and BV certifying are in processing.
| Name: | Steel Flange |
| Standard: | ASME; ANSI/DIN; BS; JIS; EN; … |
| Raw material: | Carbon/stainless |
| Size: | 0.25″~56″~max. |
| Type: | WN; SO; BL; SW; PL; THRD… |
| Facing: | RF; RTJ; FF; FM; M; T; G; … |
| Pressure: | Standard |
2. Company Profile:
DHDZ China are manufacturer of the High Quality Steel Flanges and Forgings based on different standards: ASME, JIS, BS, ISO, DIN, EN, SABs etc.
Flanges covers Weld Neck, Slip On, Threaded, Lap Joint, Socket Weld, Blind, Orifice, Loose, Plate, Oval, Wind Power Flange, Tube Sheet, other Customized Flanges.
Forgings covers Blocks, Disks, Rings, Cylinders, Shafts, Tubes, Bars, other Customized forgings, etc..
Main Mateirals: Carbon Steel, Stainless Steel and Alloy steels;
International Standards: ASME, JIS, DIN, GB, BS, EN, AS, SABS, etc.
Standardization and Customization are both our advantages.
Certificate: ISO system, PED certificates, TUV certified.
Nearly 20 years experience;
clients from more than 15 Countries in EU, USA, Gulf area, UK, South America, AU, Asia, etc..
We will do our best to support you no matter big or small you are!
3. SPECIFICATION DETAILS:
| Material | Carbon steel | ASTM A105, A350 LF1, LF2, LF3, LF6, CL1/CL2,; A694 F52, F60, F65, F70; A516 Gr. 60, 70; BS-EN 15712-2 P245GH, P280GH; EN15712-4 P355NH, P355QH; EN15713 P250GH, P265GH; DIN 17243 C22.8; VD-TUEV350/3 C21; GB/T 1591 Q345B, Q420B; NB/T 47008 16Mn,20#; BS 15710-2 S235JRG2; |
| Stainless steel | ASTM A182 F304/304L, F316/316L, F316H, F304H, F321H, F310, F316Ti; NB/T 47571 S30403, S30408, S31603, S31608, S32168; BS-EN 15712-5 1.4301, 1.4307, 1.4404, 1.4541, 1.4571; |
|
| Alloy steel | ASTM A182 F95, F9, F11, F12, F22,F91,F51,F53,F55,F60,F44,etc. NB/T 47008 15CrMo, 12Cr1MoV, 1Cr5Mo; GB/T 3077 42CrMo, 30CrMo, 35CrMo; |
|
| C-276/UNS N15716 | ASTM B575/ASME SB-575,ASTM B574/ASME SB-574,ASTM B622/ASME SB-622,ASTM B619/ASME SB-619,ASTM B366/ASME SB-366,ASTM B564/ASME SB-564 | |
| Dimension Standard (DN15-DN4000mm) |
ANSI & ASWE (class 150-2500) | B16.5, B16.47, B16.48; |
| DIN (6-40bar) | DIN2527, 2573, 2576, 2630-2638, 2627-2629, 2565-2569; | |
| JIS (5K -30K) | JIS B2202, 2210, 2220; | |
| BS EN1092-1 (6-40Bar) | type 01, type 02, type 03, type 04, type 05, type 11, type 12, type 13, type 21, etc. | |
| others | MSS SP44, AWWA C207, API 6A, API 16A, AS 2129, GB/T9119, JB/T 74, HG/T2571, 20615, SH 3406, Q/GDW 705, etc.. other equivalent standards, and customization with drawings; | |
| TYPE | 1.Flat flange 2.Blind flange 3.Slip on 4.Lap joint flange 5.Welding neck Flange | |
| 6.Socket welding 7.Threaded flange 8.Long welding neck flange. etc. | ||
| Connection | Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue, Groove, Small-Tongue, Groove, etc | |
| Size | 1/2″-100″ | |
| Package | 1.>Standard export packaging (Plywood Case Of Outside,Plastic Cloth Of Inside). | |
| 2:As Customers’ Requirements | ||
| Certificate | TUV,ISO9001:2015; | |
| Applications | Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry,and general pipes connecting projects etc. | |
3. Production process:
4. Machinery & Processing equipments:
5. DHDZ Strict Quality control process ensures top quality and on-time delivery for flanges and forgings clients
6. Inspection & Package:
7. Quality Certificates:
8. Our Service Team:
Screw Shaft Types
If you’re looking for a screw shaft, but aren’t sure which type to buy, you’re in luck. In this article, we’ll talk about the different types, including Threaded shank, Round head, and Machined. Once you’ve read it, you’ll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.
Machined screw shafts
Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find 1 to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.
Ball screw nuts
If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft’s grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it’s important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the 2 ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These 2 features ensure that the ball and the nut meet at 2 points. You’ll be amazed by the results of the work of these ball screw nuts.
Threaded shank
Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress 2 pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as 1 with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is 8 mm in diameter but has a thread pitch of 1 mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it’s important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.
Round head
A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to 1 mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.
Self-locking mechanism
A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.
