GB24911-2010

Bowl-coupler type steel tube scaffolding member

碗扣式钢管脚手架构件

GB 24911-2010 は現行の中国強制国家規格です：Bowl-coupler type steel tube scaffolding member。業界：建設。テーマ：製品安全。施行日：2011年6月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

This standard applies to the production and inspection of bowl-coupler type steel tube scaffolding members used in construction, municipal, water conservancy, chemical, coal, and shipbuilding engineering. It covers scaffolding and formwork support frames. It also serves as a reference for wheel-coupler, disk-coupler, and plug-in type steel tube scaffolding members. The standard is mandatory for specific technical requirements related to materials and strength.

技術要求

The standard specifies comprehensive requirements for the materials, manufacturing processes, dimensions, and strength of scaffolding members. Materials must comply with specific Chinese standards, such as GB/T 3091 for steel tubes and GB/T 11352 for cast steel. Manufacturers must ensure raw materials have quality certificates and meet specified mechanical properties. For manufacturing processes, the standard mandates that steel tubes must be free of cracks and severe corrosion, and vertical tubes must not be extended by joining. Castings and stampings must be free of defects like cracks and sand holes. Welding must meet Grade 3 requirements as per GB 50205, with specific electrode models recommended. Regarding dimensions and tolerances, the standard sets strict limits on length deviations, tube outer diameters (48.3mm), and wall thicknesses (3.5mm with no negative tolerance). Wall thickness tolerances must not be negative, ensuring structural integrity. It also specifies requirements for adjustable bases and screw threads. The standard defines mandatory strength requirements for key components. This includes specific load-bearing capacities for upper bowl-couplers, lower bowl-coupler welds, cross-bar joints, and adjustable supports. Components must withstand specified test loads without failure.

試験方法

Testing involves visual inspection, dimensional measurement using calipers and tape measures, and strength testing using a material testing machine with precision not lower than ±1%. Strength tests require loading and unloading cycles followed by a sustained load to verify structural integrity. Specific tests include upper bowl-coupler strength, lower bowl-coupler welding strength, cross-bar joint strength, and adjustable support compressive strength.

よくある質問

What products are regulated under GB 24911-2010?

The standard regulates bowl-coupler type steel tube scaffolding members, including vertical tubes, top tubes, cross bars, diagonal bars, and supports used in construction and other engineering fields.

Are the technical requirements in GB 24911-2010 mandatory?

Yes, specific sections concerning materials (5.2), dimensions (5.4.3), and strength (5.6) are mandatory, while other clauses are recommended.

What are the key material specifications for the steel tubes?

Steel tubes must comply with GB/T 3091 for Q235 grade, with a nominal outer diameter of 48.3mm and a nominal wall thickness of 3.5mm. Wall thickness tolerances must not be negative.

The summary above provides a high-level overview of GB 24911-2010. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 24911-2010 today to access all detailed parameters, tables, and testing procedures.

適用のヒント

種別: 製品
CCS: P97
ICS: 91.220
所管部門: Ministry of Housing and Urban-Rural Development
技術委員会: Ministry of Housing and Urban-Rural Development