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.
