GB/T 3089-2020Seamless ultra-thin wall stainless steel tubes (English PDF)

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

This Standard replaced GB/T 3089-2008 Thinnest-Wall Seamless Tubes of Stainless Steel. Compared with GB/T 3089-2008, this Standard made the major technical changes as follows.

--- Modify the applicable scope; add the cold-drawn (see Clause 1 of this Edition; Clause 1 of 2008 Edition);

--- Modify the normative references (see Clause 2 of this Edition; Clause 2 of 2008 Edition);

--- Modify the ordering content (see Clause 3 of this Edition; and Clause 3 of 2008 Edition);

--- Modify the size specification range of the steel tube (see 4.1 of this Edition; 4.1.1 of 2008 Edition);

--- Modify the allowable deviation of dimension (see 4.2, 4.3 of this Edition; 4.1.2, 4.1.3 of 2008 Edition);

--- Add designation 06Cr17Ni12Mo2 (see 5.1.1 of this Edition);

--- Modify the smelting method of the steel (5.2.1 of this Edition; 5.2.1 of 2008 Edition);

--- Modify the manufacturing method of the steel tube (see 5.2.2 of this Edition; 5.2.2 of 2008 Edition);

--- Modify the mechanical properties (see 5.4 of this Edition; 5.4 of 2008 Edition);

--- Add the requirements for nonmetallic inclusions (see 5.5.2 of this Edition);

--- Modify the sampling method and test method for the inspection items of the steel tube; add the sampling quantity, sampling method and test method of nonmetallic inclusions (see 6.1, 6.2, 6.3, 6.4, 7.3 of this Edition; Clause 6, 7.3 of 2008 Edition).

1 Scope

This Standard specifies the ordering content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless ultra-thin wall stainless-steel tubes.

This Standard is applicable to spinning or cold-rolled (drawn) seamless ultra-thin wall stainless-steel tubes (hereinafter referred to as steel tubes).

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products

GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method

GB/T 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy - The Dimethylglyoxime Gravimetric Method for the Determination of Nickel Content

GB/T 223.28 Methods for Chemical Analysis of Iron, Steel and Alloy - The alpha-Benzoinoxime Gravimetric Method for the Determination of Molybdenum Content

GB/T 223.59 Iron, Steel and Alloy - Determination of Phosphorus Content - Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method

GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content

GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content

3 Ordering Content

The contract and ordering list that order products according to this Standard shall include the following contents. […]

4 Size, Shape, Weight and Allowable Deviation

5 Technical Requirements

6 Test Methods

6.1 Sampling for the analysis of chemical composition of steel tube shall be conducted according to rules of GB/T 20066.

6.2 The size and shape of the steel tube shall be measured one by one with a measuring tool that meets the accuracy requirements.

6.4 The sampling methods and test methods of other inspection items of steel tubes shall comply with the provisions in Table 8.

7 Inspection Rules

8 Packaging, Marking and Quality Certificate

8.1 Steel tubes shall be packed one by one or bundled into small bundles and put into plastic bags before packing. The packaging box shall be lined with moisture-proof wax paper and filled with foam or soft items. […]