GB/T 17396-2022Seamless hot-rolled steel tubes for hydraulic pillar service (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part

1.Rules for the structure and drafting of standardizing documents. This document replaces GB/T 17396-2009 Hot-rolled seamless steel tubes for hydraulic pillar service; compared with GB/T 17396-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Change the allowable deviation of outer diameter and wall thickness (see 5.2;

4.2 of the 2009 edition);

b) Change the usual length requirements (see 5.4.1;

4.4.1 of the 2009 edition);

c) Change the allowable deviation requirements for specific length and multiple length (see 5.4.2.2;

4.4.2 of the 2009 edition);

d) Change the requirements for the curvature in total length (see 5.5.2;

4.5.2 of the 2009 edition);

e) Change the weight requirements (see 5.8;

4.7 of the 2009 edition);

f) Delete the designation 20, add the designations 27SiMnRE, 30CrMnSi, 30CrMo (see Table 2; Table 2 of the 2009 edition);

g) Change the P and S composition requirements of all designations, and change the rare earth content requirements of 30MnNbRE (see Table 2; Table 2 of the 2009 edition);

1 Scope

GB/T 17396-2022 is the Chinese national standard on seamless hot-rolled steel tubes for hydraulic pillar service, in the field of metallurgy. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 14 October 2022 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 May 2023. Classification: ICS 77.140.75, CCS H48. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This document specifies the order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of seamless hot-rolled steel tubes for hydraulic pillar service. This document applies to the seamless hot-rolled steel tubes for cylinders and pillars used in the manufacture of coal mine hydraulic support cylinders and pillars. It also applies, as a reference, to seamless hot-rolled steel tubes for other hydraulic cylinders and pillars.

2 Normative references

The following documents are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 222, Permissible tolerances for chemical composition of steel products

GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method

GB/T 223.11, Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method

GB/T 223.12, Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content

GB/T 223.19, Methods for chemical analysis of iron, steel and alloy - The neocuproine-chloroform extraction photometric method for the determination of copper content

GB/T 223.23, Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method

3 Terms and definitions

Terms and definitions determined by GB/T 30062 are applicable to this document.

4 Order content

A contract or order for ordering steel tubes under this document shall include, but not be limited to, the following.

5 Size, shape, weight and allowable deviation

5.1 Outer diameter and wall thickness The nominal outer diameter (D) and nominal wall thickness (S) of the steel tube shall comply with the provisions of GB/T 17395.According to the requirements of the buyer and after negotiation between the supplier and the buyer, steel tubes of other outer diameters and wall thicknesses can be supplied.

5.3 Inner diameter and wall thickness As required by the buyer, after it is negotiated between the supplier and the buyer, and indicated in the contract, steel tubes can be supplied according to the inner diameter and wall thickness, where the allowable deviation shall be determined by the supplier and the buyer through negotiation.

7 Test methods

7.1 Sampling for chemical composition analysis of steel tubes shall comply with the rules of GB/T 20066.The chemical composition analysis usually complies with the provisions of GB/T 4336, GB/T 20123 or other general methods, and the arbitration shall comply with GB/T 223.5, GB/T 223.11, GB/T 223.12, GB/T 223.19, GB/T 223.23, GB/T 223.26, GB/T 223.40, GB/T 223.49, GB/T 223.59, GB/T 223.63, GB/T 223.85 and GB/T 223.86.

7.2 The size and shape of the steel tubes shall be measured one by one by gauges that meet the accuracy requirements.

7.3 The inner and outer surfaces of steel tubes shall be inspected visually under full lighting conditions.

8 Inspection rules

8.1 Inspection and acceptance The inspection and acceptance of steel tubes shall be carried out by the supplier's quality and technical supervision department.

9 Packaging, marking and quality certificate

Note 1. 2. **Search (Optional).** Enter the keyword '**GB/T 17396-2022**' in the search bar, if it is not already shown. 3.

Note 2. 9.

Note 3. 10. **Verification (USD

Notes and Explanations

Note 1:**[GB/T 17396-2022](https://

Note 3:** If you are unable to redirect back to our Return Page, do not worry. **Additionally and independently**, our automated system will still deliver your PDF and Invoice via email **(the second mechanism to ensure the delivery)**, typically within 3 minutes. Once your payment is complete, you have two instant ways to access your PDF and invoice: you may stay on the Return Page for download in 3 minutes typically, or simply check your email inbox where a copy is automatically delivered in 3 minutes typically.