316 Stainless steel full threaded Surface natural whitening treatment coupling.
Description
Threaded couplings refer to pipe connections with threads, which are the most common type of pipe fittings in industry and life.
The meaning of threaded coupling is: threaded joints make the connection of the pipeline easier, and it is easier to disassemble and replace, which greatly saves the cost of pipeline connection.
Surface natural whitening treatment
In the process of processing, stainless steel undergoes coiling, binding, welding, or artificial surface fire-roasting and heating treatment to produce black oxide skin. This hard gray-black oxide scale is mainly composed of NiCr2O4 and NiF, two EO4 components. In the past, hydrofluoric acid and nitric acid were generally used to remove them by strong corrosion. However, this method is costly, pollutes the environment, is harmful to the human body, and is highly corrosive, and is gradually eliminated. At present, there are two main methods for treating oxide scale:
(1) Sandblasting (pill) method: mainly adopts the method of spraying micro glass beads to remove the black oxide scale on the surface.
The mechanical properties of the surface of the workpiece are improved, so the fatigue resistance of the workpiece is improved, the adhesion between it and the coating is increased, the durability of the coating film is prolonged, and it is also conducive to the leveling of the coating and the decorative sandblasting. There are two types of dry sandblasting and wet sandblasting.
(2) Chemical method: use a non-polluting pickling passivation paste and a non-toxic cleaning solution with inorganic additives at room temperature for immersion. So as to achieve the purpose of whitening treatment of the natural color of stainless steel. After processing, it basically looks like a dull color. This method is more suitable for large and complex products.
| CNC Machining | Description |
| Product name | 316 Stainless steel full threaded Surface natural whitening treatment coupling |
| Material | 316 Stainless Steel |
| Surface Treatment | Natural whitening |
| Thread Type | Full thread |
| Shape | Equal |
| Service | Customized OEM/ODM |
| Certificate | ISO9001 |
| Size | Can be customized |
| Test equipment | Measurement instrument, projector, CMM, Altimeter, Micrometer, Thread Gages, Calipers, Pin guage etc. |
| Drawing Format | 3D/CAD/Dwg/IGS/STP |
| Type | Type A |
Factory Pictures
Heat Treatment
Package
Test Equipment
Go no Go guage
Q1: Are you trading company or manufacturer ?
A: We are factory.
Q2: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
Q3: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q4:Can you produce the products according to my own drawings?
A: Yes, we can produce the products according to your drawings that will be most satisfy you.
Q5:What's your terms of payment?
A: T/T, L/C , Alibaba Trade Assurance available, full protection for your orders.
Q6: Why is your price higher than other suppliers in China?
A:(1)Choosing the material: We choose superior materials, the quality of material is best and also the price of material is higher.
(2)We have engineers who are in charge of testing supervise every production process from materials to packaging and delivery of goods. We ensure the quality of finished products strictly.
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316 Stainless Steel Full Threaded Coupling Surface natural Whitening Treatment Images
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