High neck flange
Weight: 2Kg
Particle size: 200
Titanium content: 99.9%
Specification: Customised
Classification: Titanium Flange
Characteristics: Corrosion Sealing
Neck flange, also known as long neck flange and necked flange, is a disc-shaped part mainly used to achieve the connection between pipes, which has been widely used in petrochemicals, urban water supply and power systems. In recent years, with the planning and construction of extra high voltage transmission line projects for the national grid, the demand for extra high voltage steel pipe towers has increased dramatically.
As a new form of steel pipe tower flange connection, the high neck flange has been proved to have a certain degree of sophistication and reliability. It plays a vital role in improving the production capacity and product quality of steel pipe towers.
Product Information
| Product name | High neck flange |
| Weight | 2Kg |
| Particle size | 200 |
| Titanium content | 99.9% |
| Specification | Customised |
| Classification | Titanium Flange |
| Characteristics | Corrosion Sealing |
| Connection | Welding, Threading |
| Surface | Polished |
| Application | For pipe end connection |
Product properties
High strength, high corrosion resistance, high chemical activity, low thermal conductivity, low modulus of elasticity
Product details
1. real materials: the product selection of excellent materials, in line with the standard, do not cut corners
2. Finished products are smooth and clean: no peeling cracks, no oil stains, scratches, bumps on the surface, and the side cut surface is smooth and clean.
3. Excellent craftsmanship: strict craftsmanship, surface forging, length accuracy, high hardness, no cracks
4. Complete specifications: complete specifications, cut support for non-standard custom wholesale order, more affordable price!
Welding methods
Early circumferential welding of ultra-high voltage high neck butt-welding flanges and steel pipe has two main methods: manual gas-shielded welding and fully automatic oscillating gas-shielded welding.
Based on the above two welding methods, individual manufacturers of ultra-high voltage steel pipe towers independently developed a special machine for internal and external submerged arc welding in order to achieve the production process according to the characteristics of the welding process to weld circumferential welding of High neck flange and steel pipes, which is a process of submerged arc welding of the workpiece for double-sided penetration welding, and no need to carry out the root-cleaning treatment during the welding process to ensure that the quality of the welding premise of the welding process to maximize the efficiency of the welding process.
With the continuous production of high neck butt weld flanges, the welding method and welding technology are also improving, according to the specifications and size of the actual workpiece, you can reasonably choose the welding programme such as manual gas shielding welding, fully automatic swing gas shielding welding or submerged arc welding.
Welding process
1.Position welding
Position welding must be carried out by welders with corresponding qualification certificates. Welding seam near the surface of the base material and both sides should be uniform, smooth, and no burrs, cracks, oxide, rust, grease, water and other impurities.
Positioning of the weld seam thickness should not be less than 3mm, and should not exceed the design of the weld height of 2/3, the length should not be less than 40mm, the spacing should be 200-300mm, and should be evenly distributed.
2. Welding environment
The wind speed during gas shielded welding is less than 2m/s; the relative humidity of the air is ≤80%; the surface of the weldment should be kept dry.
3. Preheating and inter-channel temperature control
Preheating temperature and inter-channel temperature should be determined based on a combination of factors, such as according to the chemical composition of steel, the joints of the constraints of the state, the size of the heat input, the level of hydrogen content of the molten metal as well as the welding method used to test.
4. In the welding process, the lowest inter-channel temperature ≥ preheating temperature, the highest inter-channel temperature ≤ 230 ℃.
At present, the production technology of High neck flange has gradually matured and the overall quality is good. The total pass rate of the weld is 98%, and each key quality can meet the technical requirements of the steel pipe tower production, but the process needs to be further solidified
About us
LINKUN TITANIUM was founded in 2000, headquartered in Xi’an, China, the hometown of our President Mr. Xi Jinping, and the starting point of the new and old “Belt and Road”, as a leading Manufacturer and Supplier of High neck flange and Titanium Alloys, LINKUN TITANIUM has been insisting on creating value for customers, always adhering to the development strategy of “supplying high-end products, establishing world-renowned enterprise” to provide global customers with superior quality products and high-quality services. Through the resource integration of a variety of metal materials, LINKUN TITANIUM has become one of the biggest TITANIUM PRODUCTS SUPERMARKETS and can provide lots of quality grades to our customers
