Phosphorus recycling waste materials see results
Guizhou Kaihua Chemical Equipment Engineering Co., Ltd. has stepped up the recycling of waste materials. Up to now, 29 old welding machines and 42 hoists have been repaired, saving more than 100,000 yuan. Since the beginning of this year, the Phosphorus Chemicals Equipment Engineering Company has implemented a trade-in replacement system for waste materials. For materials such as tools and consumable cutting nozzles, electrode holders, etc., the company requires each workshop to clean and deliver the old ones to the supply station before they can use the new products. In addition, the company seeks the repair of old materials that can be repaired, and classifies the old materials that cannot be repaired and repaired, and can be reused. For serious, large-scale damaged materials that need to be scrapped, they are retired after being verified by the company's supervision department. .
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,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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