Hualai 16mm SS316L Pall Rings Negociation Thickness For Korean Customer
Hualai factory can supply various sizes of pall rings, according to either China's domestic standard, or negociated specification.
Stainless Steel Pall Rings Packing HG/T 21556.2-95.
I have a korean customer named Mr. J. He works as a chemical engineer in a corporation laboratory. Last time he contacted me to see if we could provide 16mm pall rings in SS316, with certificates for the material. Also he need the column random packing in a hurry. Surely no problem! We have stock of such packing for immediate delivery. It is convenient to send the pall rings by SF-express to Republic of Korea, especially when the customers have a SF account.
This page is about standard specifications of pall rings, 16mm, 25mm, 38mm, 50mm, 76mm in diameter and hieght. Here also introduced the structure size, manufacturing, inspecting, packaging and shipping.
The working temperature of SS pall rings is recommended to be under 400 centigrade.
The pall rings are in cylinder shape, with equal height and diameter, and some windows on the side.
How to choose the best suitable size of Metal Pall Rings?
Here we have some reference data:
| Size Dia.*Height (mm) | Thickness mm | Pack No. (m3) | Specific Area (m2/m3) | Void Volume % | Dry Packing Factor |
| 16*16 | 0.3 | 214000 | 362 | 94.9 | 423 |
| 25*25 | 0.5 | 51940 | 219 | 95.0 | 255 |
| 38*38 | 0.6 | 15180 | 146 | 95.9 | 165 |
| 50*50 | 0.8 | 6500 | 109 | 96.0 | 124 |
| 76*76 | 1.2 | 1830 | 71 | 96.1 | 80 |
More sizes and thickness are available as per order.
Material: carbon steel, stainless steel 304, 316L, 904L, copper, etc.
The joint clearance of pall ring shall be less than 0.4mm for dn16, DN25 and dn38mm, and less than 0.8mm for DN50 and dn76. The upper and lower edges of the ring are not allowed to be dislocated. The end cross section of the pall ring shall be perpendicular to the axial center line and 90 degrees to the side.
There shall be no crack on the surface of packing ring and no burr on the edge of packing.
The package material must be strong enough, to endure loading, unloading and carrying for a few times. And it shall protect the pall rings to reach destination safely. Rain proof and moisture-proof measures shall be taken for metal pall rings during transportation. The random tower packing stainless steel pall rings shall be stored in a dry and non corrosive place. Do not store the pall rings in broken packages.
In 1940s, a famous Gemeny company modified the raschig ring greatly. In metal raschig rings, they open several windows on the side wall with inward blades. Without increasing the surface area of the packing, the flow of gas-liquid two-phase in the packing layer is greatly improved, and the hydrodynamics and mass transfer performance of the packing are improved.
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