CBM 1124-1982 Marine cylindrical viewer CBM1124-1982 standard download decompression password: www.bzxz.net

China State Shipbuilding Corporation Foreign Trade Standards
CBM 1124 - 82
Marine Cylindrical SightGlasses1983-01-19 Issued
China State Shipbuilding Corporation
1983-05-01 Implementation
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Marine Cylindrical Sight
Marine Cylindrical Sight GlassesCBM1124-82
This standard specifies flange connection dimensions consistent with JIS＇B2211-1977, and its basic parameters and structure conform to JISF7218-75.
Basic parameters are shown in Table 1
Nominal pressure pg
(kgf/cm)
Nominal diameter Dg
25~200
Applicable medium
Overflow pipeline water and oil system
2. The structure type and size of the observer are shown in the figure below and Table 2. Dg25~50
China Shipbuilding Industry Corporation 1983-0-19 Issued Dg65~200
Temperature range
1983-05-01 Implementation
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0/11590
100120
9245235200
12512511||tt| |1501512d31d265230
200/209
380320280
Observer 80
3.Material of main parts see Table 3
Bolt diameter
Marking example
Marine cylindrical observer
CBM1124-82
Transparent tube
Cast tin bronze
Methyl methacrylate
Brand. No.
HT20-40
zQSn10-21
4:-Test and acceptance technical provisions are in accordance with GB600-82. Flange connection dimensions are in accordance with CBM1005-81.
M48×2
Mi00x2
M110X2
Transparent tube
M130X2
i341097
M165X3
M195x3
M240X3
2041681
Standard No.
GB976-67:||tt ||ECB88378
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Additional instructions·
This standard was proposed by the Pipe Accessories Professional Group and is under the jurisdiction of Dalian Shipyard. This standard was drafted by Wuchang Shipyard: The main drafter of this standard, Ruan Yiquan
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Preparation Instructions
Marine cylindrical observer is one of the accessories installed on the water and oil pipe system of the overflow pipe of the mechanical part of inland and coastal ships. Over the years, there have been various forms of observers designed in my country, but with the development of the shipbuilding industry, the demand for observers has increased and the requirements have become higher and higher. In order to further reform the past observers* and combine the situation that the export ships need to observe the flow everywhere in the structure, it is considered necessary to unify. Therefore, this standard is compiled. The parameters and structural dimensions of this standard conform to JISF7218-75. Changing the flat glass of the original CB422-65 two-way viewer to a cylindrical transparent tube for a simple viewer can basically meet the new requirements. The lower part of the upper body and the lower flange are connected as one by a T-shaped (rib) reinforcement material. The transparent tube is inserted from the bottom. The lower flange has an internal screw to fit into the cover. The upper flange is conical to prevent the fluid from splashing around the inner side of the cylindrical glass. This angle corresponds to 13° at the center for the maximum flow rate. The material of the cylindrical transparent tube (propylene resin according to JIS standard) is a thermoplastic resin: its main properties are shown in Table 1
Strength kgf/cm(25℃)
1.184530~
Elastic coefficient
kgf/cm
(25℃)
31·6X103
Transparency
Linear expansion
9929x10
The physical and mechanical properties of domestic organic glass tubes are shown in Table 2.
Strength kgf/m(25℃)
Tension and compression
>5501300
Elastic coefficient
kgf /cm
(25℃)
Thermal conductivity
cal/cm2Www.bzxZ.net
4~6x10-4
Absorption rate
Highest available
(24 hours)
Temperature℃
69~850-3-04
Impact value softening
Brown transparency Thermal conductivity Thermal shape Water absorption rate Metric·cm
>24X103>18
Thousand/·G
0·12~0·17≥78
cm2
In view of the above two different materials, their physical and mechanical properties are slightly different, but the main parameter indicators are consistent. However, acrylic resin and other glass tubes are currently out of stock in China: Therefore, the editors suggest using the organic glass tube produced by Shanghai Hualian Products Factory as the transparent tube on the cylindrical observer. 4
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