250Y metal plate distillation tower packing 800mm round shape
structured packing
Stainless Steel Perforated Plate Corrugated Packing Standard
Manufacturing requirements of 250Y distillation packing
The whole disc of packing shall be tightly clamped with steel belt,
and the end of the hoop shall be lapped and spot welded to prevent
the packing from deformation. After the upper hoop is installed,
the upper edge shall be cut and reserved for the flanging before
the packing is installed in the tower, and the hoop shall be made
into the form of anti wall flow ring. For the block packing, the
packing block close to the tower wall shall be made into the form
of anti wall flow ring at the end close to the tower wall. The gap
between the slits depends on the diameter of the tray, and it shall
be close to the tower wall.
For block packing, block diagram shall be drawn. The packing block
with the same size and specification in the drawing is called
"standard block", and the packing block with other sizes is called
"non-standard block".
There are three methods to construct the packing block: nailing
through, spot welding and combination of both.
The packing of the whole disc or the packing blocks shall be
arranged evenly, and the disc surface shall be flat without
unevenness.
Structural dimension and characteristic parameters of stainless
steel orifice corrugated packing.
| Item | Unit | 125X | 125Y | 250X | 250Y | 350X | 350Y | 500X | 500Y |
| corrugation height h | mm | 24.0 | 11.5 | 8.4 | 6.0 |
| corrugation inclination θ | (°) | 30 | 45 | 30 | 45 | 30 | 45 | 30 | 45 |
| corrugation distance 2B | mm | 39.6 | 19.0 | 14.0 | 9.9 |
| corrugation angle β | (°) | 79.0 | 79.1 | 79.6 | 79.0 |
| void fraction ε | δ=0.15mm | % | 99.4 | 98.6 | 98.0 | 97.2 |
| δ=0.12mm | % | 99.5 | 98.9 | 98.4 | 97.8 |
| δ=0.10mm | % | 99.6 | 99.1 | 98.7 | 98.2 |
| Perforated hole diameter d0 | mm | 4.5 | 4.5 | 4.0 | 4.0 |
| Opening rate σ | % | 8.5-9.5 | 8.5-9.5 | 9.0-10.0 | 9.0-10.0 |
| radius of curvature of the top circle of corrugation angle R | mm | ≤2.0 | ≤1.4 | ≤0.9 | ≤0.5 |
Note: The influence of opening rate on the plate is not calculated
1 General Provisions
1.1 This standard specifies the requirements for marking,
specification and characteristics, materials, manufacturing
requirements, inspection and acceptance, marking, packaging,
storage and transportation of stainless steel orifice corrugated
packing products, as well as the calculation of characteristic
parameters of orifice corrugated packing.
1.2 The corrugated packing with stainless steel orifice plate is
suitable for gas-liquid mass transfer separation tower equipment,
and the applicable temperature of the packing is - 200 ~ 400 ℃.
1.3 The structured packing is suitable for the clean gas-liquid
system without solid particles or suspended solids or easy to self
assemble.
2. Reference standard: GB / T 4239 cold rolled stainless steel and
heat resistant steel strip
3.1 Mark
HG/T 21559.2—2005—P×××—×××
Standard No. - year No. - packing model - inner diameter of tower Φ
(mm)
For example, the inner diameter of packing tower is Φ 600mm, and
p250i type stainless steel orifice corrugated packing is used,
which is marked as follows: HG/T 21559.2—2005—P250I—600.
3.2 Specifications and characteristics
3.2.1 Stainless steel orifice corrugated packing is a number of
corrugated plates pressed from stainless steel strip, which are
vertically stacked and assembled into a disc-shaped structured
packing according to the requirements of a certain diameter. The
corrugations of the adjacent corrugated plates are inclined in the
opposite direction, and the corrugations of the upper and lower
adjacent packing plates are 90 ° crossed.
3.2.2 Before the corrugated plate is pressed, it is necessary to
punch holes on the plate in advance and press the fine grain, or
use the rolling grain equivalent to the fine grain.
3.2.3 Eight types of stainless steel orifice plate corrugated
packing are listed in the table. The characteristic parameters of
the type selection are the specific surface area of the packing and
the angle of the corrugation, which can be selected according to
the process design requirements.
Stainless steel orifice corrugated plate
h: corrugation height (mm)
2B: corrugation distance (mm)
β: corrugation angle (°)
δ: plate thickness (mm)
S: corrugation length (mm)
R: radius of curvature of the top circle of corrugation angle (mm)
every year we manufacture and supply hundreds of cubic meters of
metal structured packing in different models. There are many
popular types and materials for option. Custom order is welcome,
too! We are happy to help with what you need!
