Similar economic analysis problems exist in the repair work of hole-type and crack-defect welds of steel castings, and the range of weldables is limited. According to the international standard ISO 4990 "General technical conditions for the delivery of cast steel parts" for the steel castings that require significant welding repair, the factory producer shall obtain the prior consent of the buyer. The so-called major weld repair is a pressure vessel casting that requires a hydraulic test for a pit depth of more than 20 mm or 25 mm of the wall thickness (whichever is less) or a pit area of ​​more than 65 cm2. However, it is not necessarily defective, but it must be repaired, such as general-purpose steel castings, uniform wall thickness (no modulus gradient) or hot knot center shrinkage or shrinkage. If it is not clear that it must be eliminated, it is usually not repaired. This can result in a high production rate of the casting and avoid the use of cold heading, thereby reducing the casting production cost.
Usually the repair loss is the replacement material, labor and energy loss, divided by the return rate. According to the name of the casting, all the repair losses of the foundry can be obtained. Through a large number of statistical analysis, it is known that the recovery of the economic income from the repair of the loss is limited, the purpose of the repair is to strive for the delivery deadline, or to complete the productivity index of the workshop within a certain period.
In order to ensure balanced production, while reducing the loss of repair, the most economical way is to improve the pass rate of casting products. Rework of surface defects of steel castings. If high-grade casting materials are used, the production cost can be increased, but it is much smaller than the repair loss. Choose the best raw materials and auxiliary materials to produce castings that are satisfactory to the user.
Casting weld repair involves the life and operational reliability of the casting, and reliability is an important quality characteristic of the product. Whether the reliability of the repaired parts can be consistent with the non-repaired parts is a problem that people are worried about, so the quality of the repairing process and the quality of the welding repair are highly valued. Experience has shown that if the quality of the weld repair is not guaranteed, even if there is a 1% "defect" in the weld repair zone, problems will occur in the use of the product, causing a major loss in material and factory reputation. Therefore, the repair quality must be strictly Inspection: Check whether the defects before welding are cleaned, whether the surface to be welded is clean, and whether the welding angle is reasonable. Whether the weld after welding is flat, whether there are cracks or cracks around the weld repair and surrounding. After welding, it is supplemented with no damage (magnetic flaw detection, etc.) to ensure the reliability of the weld repair quality. Through the customer's promotion with the past few years, because the product is in the welding repair process, there is no heat input, which ensures that the workpiece does not deform when welding, no undercut, no hard spots, no repair marks, etc. Processing, etc., the metal defect repair cold welder produced by Fussen Company has achieved the customer's demand and quality assurance. Welcome to consult.
ATEX Approved Coriolis Mass Flow Meter
Sealand is a trustworthy manufacturer of Mass Flow Meter Coriolis, Mass Flowmeter Coriolis, Flow Meter Coriolis and Meter Coriolis, ATEX, CE & IECEx approved.
The flow meter model covers from DN03 to DN150, and bigger models are being developed. Main specification is as follows.
Model No.
Diameter
(mm)
Max. flow rate
(kg/min)
MWP.
(MPa)
Accuracy grade
(%)
Zero stability
(kg/h)
CG-03
03
6
4
0.1/ 0.2/ 0.5
0.012
CG-06
06
18
4
0.1/ 0.2/ 0.5
0.04
CG-15
15
50
25
0.1/ 0.2/ 0.5
0.12
CNG-20
20
120
25
0.1/ 0.2/ 0.5
0.36
CG-25
25
200
4
0.1/ 0.2/ 0.5
0.62
CG-40
40
500
4
0.1/ 0.2/ 0.5
1.60
CG-50
50
1000
4
0.1/ 0.2/ 0.5
2.38
CG-80
80
3000
4
0.1/ 0.2/ 0.5
7.05
CG-100
100
3600
4
0.1/ 0.2/ 0.5
12.00
CG-150
150
8000
4
0.1/ 0.2/ 0.5
50.00
Mass Flow Meter Coriolis, Mass Flowmeter Coriolis, Flow Meter Coriolis, Meter Coriolis
Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeters.com