Everyone should know that paint is an indispensable paint in home decoration. However, there are many varieties of paint on the market, and primers and topcoats are two of the more frequently used indoor wall decoration. However, many consumers are still stupid as to what is the difference between the primer and the topcoat ? The following editors will analyze and analyze it from three aspects. Friends in need, please come and see it.
The difference between primer and topcoat 1. Different ingredients
It is understood that there are many fillers for the primer, which are composed of four parts: resin, filler, solvent and additives. The content of the emulsion is high, the adhesion is strong, and the texture is good. However, compared to the primer, the filler of the top coat is added very little, even some are not added. Therefore, the differences in composition lay down their own characteristics and differences.
The difference between primer and topcoat 2. Different performance
From the performance point of view, the primer is used to fill the paint surface and play the role of supporting the topcoat; and the topcoat is the last layer applied to the decoration of the building wall to increase the thickness of the paint film. However, the coating thickness of the topcoat needs to be provided by the primer, so the topcoat not only plays a decorative role, but also protects the primer. In addition, the primer also has the advantage of doing more with less, filling pores, allowing objects to reach a certain decoration effect, thereby reducing the amount of topcoat. However, the topcoat does not have filling properties, and has proper gloss retention / color, leveling, and adhesion.
The difference between primer and topcoat 3. Different prices
With the development of society, there are many brands of paint on the market, and primers and topcoats are no exception. However, the prices of primers and topcoats of different brands are quite different. In addition, the different ingredients and uses also make the price high and low. However, we should also remind everyone that in addition to price, the quality and decorative effects should be equally valued when buying, so that the living room can be decorated beautifully.
Editor's remarks: Well, I will introduce you to the difference between the primer and the topcoat . In fact, the decorative effect of the primer and topcoat are good. But no matter which one you choose, you must go to a regular store to purchase, so that the quality, price and after-sales service are more guaranteed. Of course, if you need more information about building materials, please continue to pay attention to our website, thank you!
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The difference between primer and topcoat
In Petro and chemical industry for flange connections Stud Bolts and Hex Bolts are used
The quantity of bolts for a flange connection will be given by the number of bolt holes in a flange, diameter and length of bolts is dependent of flange type and Pressure Class of flange.
Stud Bolt length are defined in Asme B16.5 standard. The length in inches is equal to the effective thread length measured parallel to the axis, from the first to the first thread without the chamfers (points). First thread is defined as the intersection of the major diameter of the thread with the base of the point.
1) Standards: Based on DIN & ANSI & JIS & IFI
and per drwing
2) Material: carbon steel, alloy steel, stainless steel
3) bolt Size: M4-M42,3/8"--7/8"
4) bolt Surface: Plain,Zinc ,HDG,DAC,Geomet
5) bolt Thread: UNC, UNF, Metric Thread
6) bolt Quality control : ISO 9001
7) bolt Package : Small box ,Poly Bag,Carton+Pallet
Grades of Stud Bolts
Below a table with materials and grades for flanges, thread rods (bolts) and nuts, arranged on design temperature, flanges, thread rods and recommended nuts.
|
DESIGN |
FLANGES |
GRADE |
GRADE |
|
TEMP. |
THREAD RODS |
NUTS |
|
|
-195° to 102°C |
ASTM A182 |
A320 Gr.B8 Class2 |
A194 Gr.8A |
|
Gr. F304, F304L, F316, |
|||
|
F316L, F321, F347 |
|||
|
-101° to -47°C |
ASTM A350 |
A320 Gr.L7 |
A194 Gr.7 |
|
Gr.LF3 |
|||
|
-46° to -30°C |
ASTM A350 |
A320 Gr.L7 |
A194 Gr.7 |
|
Gr.LF2 |
|||
|
-29° to 427°C |
ASTM A105 |
A193 Gr.B7 |
A194 Gr.2H |
|
428° to 537°C |
ASTM A182 |
A193 Gr.B16 |
A194 Gr.2H |
|
Gr.F11, F22 |
|||
|
538° to 648°C |
ASTM A182 |
A193 Gr.B8 Class1 |
A194 Gr.8A |
|
Gr.F11, F22 |
|||
|
649° to 815°C |
ASTM A182 |
A193 Gr.B8 Class1 |
A194 Gr.8A |
|
Gr. F304H, F316H |
|||
|
DESIGN |
FLG'S |
GRADE |
GRADE |
|
TEMP. |
THREAD RODS |
NUTS |
Should any inquiry related to stud bolts and nuts , please don`t hesitate to contact us .
Price for stud bolts and nuts are available .
Stud Bolt
Stud Bolt,Directly Stud Bolt,Fasteners Stud Bolt, Grade B7 Stud, 2H Heavy Hex Nut, ASTM A193 Stud Bolt, A193 GR b7 Stud Bolt
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