HG/T 2185-1991 Appearance quality of rubber hose

Original standard number GB 1189-1981 HG/T 2185-1991 Rubber hose appearance quality HG/T2185-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Appearance Quality of Rubber Hose
1 Subject Content and Scope of Application
HG 2185-91
This standard specifies the appearance quality requirements and appearance quality grade determination of hoses such as water conveying rubber hose, compressed air rubber hose, dilute acid and alkali resistant rubber hose, fabric reinforced water suction hose, oxygen rubber hose and acetylene rubber hose. This standard applies to the appearance quality inspection of the above-mentioned rubber hoses and serves as the basis for determining the grade. 2 Appearance Quality Requirements of Rubber Hose
2.1 Rubber hoses are not allowed to have abnormal phenomena such as right twisting, delamination, exposed reinforcement layer, etc. The outer rubber layer is not allowed to have sponges and should be free of wrinkles (except corrugated hoses) and local bulges, but slight marks left by vulcanized wrapping cloth are allowed. 2.2 The inner rubber layer of the rubber hose is not allowed to have cracks, sponges, holes and bubbles. 2.3 The thickness of the corresponding rubber layer at the overlap of the rubber layer or reinforcement layer of the rubber hose is allowed to be thinned. The overlapping of adjacent layers of outer rubber layer, reinforcing layer and inner rubber layer is not allowed. 2.4 The inner and outer surfaces of rubber hose should be clean, and no oil or foreign impurities are allowed. 2.5 Suction rubber hose and suction and discharge dual-purpose rubber hose are not allowed to be entangled or disordered. 3 Determination of appearance quality grade
3.1 Determination of appearance quality grade of rubber hose is shown in the following table. No.
Defect content
Impurities and decay marks on outer rubber layer
Overlap marks and cracks on rubber layer
Bubble, rupture, exposed line and exposed increase on outer rubber layer
Hose placement marks and marks
Reinforcement hanging water quilt and fold
Water bag cloth wrinkles and rips
Local bulge of hose
The depth shall not be greater than 0. 5mms
The cumulative length of the mark shall not exceed 3% of the total length of the hose. But there should be no crack
Qualified products
The depth shall not be greater than 0.8mm, and those exceeding it shall be repaired and improved
The total length of the mark shall not exceed 30% of the total length of the hose, and the cumulative length of the crack shall not exceed 5% of the total length of the hose, but after one repair and improvement
The hose length shall be calculated, and one is allowed in every m of length, but it shall be repaired and improved
The soft arm mark shall not exceed the outer circumference
The hose mark shall not exceed 12% of the outer circumference, 8% of the dent length, and no dents are allowed
The cumulative axial length shall not exceed 3% of the hose length
Approved by the Ministry of Chemical Industry of the People's Republic of China on December 23, 1991, calculated according to the hose length, every m The inner rubber layer is allowed to have a place, but the depth shall not exceed 1.0mmwww.bzxz.net
The cumulative length of the wrinkle shall not exceed 10% of the total length of the hose
One-time repair is allowed if the reinforcement layer is not deformed
1992-05-01Implementation
Out of roundness
Defect content
Inner rubber layer is not hooked
HG 2185-91
Not more than 20%
Not more than 25%
Unevenness is small or large! C.5mn "Overlap
Unevenness shall not exceed 0.8mm (overlapping parts except joints)
Note: Items 1 and 6 of this table are not applicable to suction rubber hoses. The out-of-roundness is calculated as follows:
Out-of-roundness (%) - Maximum inner diameter × 100 nominal inner diameter
3.2 Appearance defects exceeding the qualified products are regarded as unqualified products, and those with no use value are regarded as waste products. Appearance defects not specified in this standard shall be implemented in accordance with similar provisions in this standard. 3.3
Additional remarks:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Rubber Hose Sub-Technical Committee of the National Rubber and Rubber Products Standardization Technical Committee. This standard was drafted by the Shenyang Rubber Industrial Products Research Institute of the Ministry of Chemical Industry. The drafters of this standard are Wang Weixiang, Wang Baozhu, Yan Songfeng, and Liang Saiban.
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