GB/T 17456.2: Evolution and historical versions
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Ductile iron pipes, fittings and accessories - External zinc-based coating - Part 2: Zinc rich paint with finishing layer
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GB/T 17456.2-2025
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| GB/T 17456.2-2010 | English | 139 |
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Ductile iron pipes -- External zinc coating -- Part 2: Zinc rich paint with finishing layer
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GB/T 17456.2-2010
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Basic data | Standard ID | GB/T 17456.2-2025 (GB/T17456.2-2025) | | Description (Translated English) | Ductile iron pipes, fittings and accessories - External zinc-based coating - Part 2: Zinc rich paint with finishing layer | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 17456.2-2010 | GB/T 17456.2-2010: Ductile iron pipes -- External zinc coating -- Part 2: Zinc rich paint with finishing layer
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Ductile iron pipes External zinc coating Part 2. Zinc rich paint with finishing layer
ICS 77.140.75
H48
National Standards of People's Republic of China
Ductile iron pipe outer surface of the zinc coating
Part 2. zinc-rich paint coating with finishing layer
Part 2. Zincrichpaintwithfinishinglayer
(ISO 8179-2.1995, MOD)
Issued on. 2011-01-10
2011-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 17456 "ductile iron pipe outer surface of the zinc coating" is divided into the following two parts.
--- Part 1. spray zinc coating with finishing layer
--- Part 2. zinc-rich paint coating with finishing layer
This section is GB/T Part of 217,456.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses redrafted Law Amendment uses ISO 8179-2.1995 "ductile iron pipe outer surface of the zinc coating - Part 2. With Final
Decorative layer of zinc-rich paints and coatings. "
This part of ISO 8179-2.1995 as compared to some adjustments in the structure. the international standard 4.5 to a new increase in Chapter 6 6.1
The increase of 6.2, this section corresponding to international standards 4.5 4.6 Other clauses correspond exactly.
This part of ISO 8179-2.1995 as compared to the existence of technical differences between the terms of these technical differences have been involved in through the outside page
Vertical singlet margin position (|) have been marked, and this part of ISO 8179-2.1995 compared to the main technical differences are as follows.
--- With Normative references in adopting international standards in place of national standards with international standards, while adding a reference to the ISO 2808;
--- Increased "in order to avoid foaming, the average thickness of the coating dry finish should not exceed 250μm" requirements;
--- Increased 6.2 specifies the method for determination of finishing the coating thickness.
This section also made the following editorial changes.
--- Remove the foreword to international standards;
--- Use the decimal symbol. "" Instead of the symbol "."
This part is proposed by the China Iron and Steel Association.
This part of the National Steel Standardization Technical Committee (SAC/TC183) centralized.
This section is drafted. Xinxing Ductile Iron Pipes AG.
The main drafters of this section. Li Jun, Liyan Ning, Dong Jianzhong, Zhao Fuen, Liu Junfeng, Ye Wei together, Zhucheng Liang, Li Ning, Wangen Qing.
Ductile iron pipe outer surface of the zinc coating
Part 2. zinc-rich paint coating with finishing layer
1 Scope
This section GB/T 17456 specifies the GB/T 13295 in ductile iron pipe (hereinafter referred to as ductile iron pipe) the outer surface of the zinc-rich paint coating
And finish coating thickness measurement method and technical requirements.
This section applies to the outer surface of the ductile iron pipe with a zinc-rich paint coating finishing layer.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 13295 Water and gas pipes with ductile iron pipes, fittings and accessories (GB/T 13295-2008, ISO 2531.1998,
MOD)
ISO 2808 Paints and varnishes Determination of film thickness
3 Materials
The dry film coating material is a zinc content of not less than 85% (mass fraction) of inorganic zinc-rich paint, finishing paint or coating material is asphalt and zinc
Coating compatibility of synthetic resin coating.
4 zinc-rich paint coating
4.1 ductile iron pipe surface state
Ductile iron pipe surface should be dry, no dust, no attachment is not strong particles or foreign substances, such as oil or grease.
Determined by the manufacturer, the outer surface of the ductile iron pipe oxidized zinc-rich paint or spray or brush on the surface after sandblasting or grinding.
4.2 coating method
The zinc-rich paint spray or brush the outer surface of the ductile iron pipe.
Design and construction spraying equipment is not included in the scope of this.
4.3 coating requirements
Zinc coating shall cover the outer surface of the ductile iron pipe, no nudity and attachment is not strong and other defects.
As long as the quality of the zinc coating to meet the requirements of 4.4, allowed a spiral appearance.
Since the operation has been coated with zinc coating damage caused, as long as each square meter area in cumulative lesion area as no more than 5cm2 and single
Damaged areas smaller one dimension not more than 5mm, the coating quality can be considered qualified.
Larger area of \u200b\u200bdamage should be repaired 4.5.
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