What should you pay attention to when choosing a plastic case and chassis?

Today, China's large plastics industry website - Jiuzhi Plastics Co., Ltd. tells you about the matters needing attention in the selection of plastic casings and chassis, as follows:
Material
ABS propylene x-ennitrile-butadiene-styrene copolymer, A for propylene x-enenitrile, B for butadiene, S for styrene
ABS plastic has many excellent properties, it organically unifies the properties of various plastics, and has excellent mechanical properties of toughness, hardness, and phase balance. It is widely used in various occasions. Is a high performance engineering plastic
The plastics on the front panel of the good chassis are made of ABS engineering plastics, which are firm and stable. If the chassis adopts mechanical strength and heat resistance, copper is much better, but ABS has low cost, light weight and chemical resistance.
2. Workmanship
Look at the steel frame whether there are burrs, sharp mouth, good chassis is often covered, at least polished, will not let you "scarred" when installed; second, see whether the chassis frame is stable and stable, the simplest The method is to shake it up with force. If there is shaking or even deformation, it is definitely not a good product. Third, whether the internal production is professional, such as whether the punching position and size on the chassis match when the motherboard is installed, whether the drive slot and the card position are positioned. Accurately wait. Four to see if there are EMI contacts, there are many small protrusions around the side panels. It can reduce electromagnetic waves, which is beneficial to human health. In short, the choice of computer chassis is important to see its materials, workmanship and practicality. Never be confused by the fashion of the exterior.

Malleable Iron Pipe Fittings normally use for water pipelines,also can use for oil and gas. Because some of them need Galvanizing, so some clients all it G.I fittings or Iron Fittings. The fittings included Elbow,Nipples, Tees, Caps, Unions, plugs, etc. The details as follow:

Standard:

For BS Pipe Fittings: BS 21:1985                                          
For ANSI pipe fittings: ANSI/ASME B1 20.1-1983                          
For DIN pipe fittings: DIN 2950/1692/2999                                

                                                           

Mechanical Properties:                                        

1)Tensile strength>or=330Mpa                                        
(2)Bending strength>or=520Mpa
(3)Shearing strength>or=284Mpa
(4)Elongation eate>or=8%
(5)Hardness<or=HB150

 

Hydraulic Test 

Test pressure:2.5Mpa
Working pressure:1.6Mpa

 

Chemical Compositions:

C:2.6%-2.8% Si:1.5%-1.8%
Mn:0.55%-0.7% S:0.25%-0.3%

 

Type:

Beaded, Beaded with rib, Banded,Banded with rib,Plain

Finishing:

Black, Hot-dipped galvanized, Electro-galvanized


Beaded Type:

beaded type

Banded type:

banded type


Malleable Iron Pipe Fittings

Malleable Iron Pipe Fittings,Galvanized Fittings,Iron Fittings,Zinc Coated Fittings

HEBEI ZIFENG NEW ENERGY TECHNOLOGY CO.,LTD. , https://www.zifengpipeline.com

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