GB/T 46446.1-2025Petroleum, petrochemicals and natural gas industries - Internal coating and lining of carbon steel process vessels - Part 1: Technical requirements (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 1 of GB/T 46446 "Coatings and Linings for Carbon Steel Process Vessels in the Petroleum, Petrochemical and Natural Gas Industries".

GB/T 46446 has published the following parts.

---Part 1: Technical Requirements.

This document is modified to adopt ISO 18796-1:2018 "Coatings and linings inside carbon steel process vessels for the petroleum, petrochemical and gas industries - Part 1".

Part. Technical Requirements.

This document has undergone the following structural adjustments compared to ISO 18796-1:2018.

---Chapter 7 corresponds to Chapters 8 and 9 of ISO 18796-1:2018, with sections 7.1 to 7.4 corresponding to sections of ISO 18796-1:2018.

Chapter 8, section 7.5 corresponds to Chapter 9 of ISO 18796-1:2018;

---Chapter 8 corresponds to Chapter 10 of ISO 18796-1:2018, where 8.6.5 corresponds to 10.7 of ISO 18796-1:2018;

---Chapters 4, 5, 6, 9, and 10 correspond to Chapters 5, 6, 7, and 8 of ISO 18796-1:2018, respectively.

Chapter 11, Chapter 12.

The technical differences between this document and ISO 18796-1:2018, and the reasons therefor, are as follows.

---Unused terms such as "ASTM", "BGAS", "BS", "CV", "DFT", "GRUP", "GRVE", "GSO", and "ISO " have been removed from the text.

The 16 abbreviations are "NACE", "OSHA", "QP", "RH", "RP", "SSPC", and "WFT" (see 3.2);

---ISO 4624 has been replaced by the normatively referenced GB/T 5210 (see Table 1), and GB/T 30648 (all parts) has been replaced by the normatively referenced GB/T 5210 (see Table 1).

The ISO 2812 standard (all parts) has been replaced (see Table 1), and the normatively referenced GB/T 6742 has replaced ASTM D522.

(See Table 1) ASTM D2583 has been replaced with the normatively referenced GB/T 3854 (see Table 1).

GB/T 531.1 replaces ISO 7619-1 (see Table 1), and GB/T 1768, a normative reference, replaces ASTM D4060.

(See Table 1) ISO 8502-9 has been replaced by the normatively referenced GB/T 18570.9 (see 6.3.3, 8.5.4).

GB/T 18570.6 replaces ISO 8502-6 (see 6.3.3, 8.5.4) and uses the normatively referenced GB/T 18838 (all parts).

The ISO 11124 (all parts) (see 6.4.1) standard was replaced by the normatively referenced GB/T 19816 (all parts).

ISO 11125 (all parts) (see 6.4.1) replaces ISO 8503-4 (see GB/T 13288.4, which is normatively referenced).

6.4.3) ISO 8503-5 has been replaced by the normatively referenced GB/T 13288.5 (see 6.4.3).

GB/T 8923.1 replaces ISO 8501-1 (see 6.4.4, 6.5.2, 8.5.3) and replaces the normatively referenced GB/T 18570.3.

ISO 8502-3 (see 6.4.8, 8.5.5) was replaced, and ISO 2808 (see 7.4.1) was replaced by the normatively referenced GB/T 13452.2.

The normative reference GB 13200 replaces ISO 7027 (see 8.4.2), and the normative reference GB/T 17849 replaces [the previous standard].

ISO 11127 (see 8.4.2) replaces ASTM D5402 (see 8.6.4) with the normatively referenced GB/T 23989.

GB/T 18253, which is used for reference, replaces ISO 10474 (see 10.4) for ease of application in this document;

---The adhesion requirement has been changed to a high-temperature and high-pressure performance requirement, and requirements for coating hardness and coating impact resistance have been added (see Table 1).

Further improve the compatibility between indoor testing and field service environments;

---Added construction environment requirements [see 7.2d)] to further standardize the painting process;

---Change "coating" to "coating/lining" to align with relevant standards.

The following editorial changes have been made to this document.

---Chapter 4 of ISO 18796-1:2018 has been removed;

---All comments regarding standard equivalence have been removed from the file;

---The unit "mil" has been removed from 5.5, leaving only the unit "µm";

---The unit in 6.4.7 has been changed to MPa, and the numerical values have been adjusted accordingly;

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed and is under the jurisdiction of the National Technical Committee on Standardization of Petroleum Drilling Equipment and Tools (SAC/TC96).

Introduction

Carbon steel process vessels used in the oil, petrochemical, and natural gas industries operate under complex internal media conditions, enduring long-term exposure to high temperatures, high pressures, H2S/CO2, and corrosion.

The action of corrosive chemicals and other media poses varying degrees of corrosion risk. Coating and lining corrosion protection technologies are cost-effective and customizable.

Its high stability and wide range of application conditions have made it one of the main means to alleviate corrosion problems in carbon steel process vessels, and it has been widely used.

To standardize the application, operation, and maintenance of coatings and linings for carbon steel process vessels, regulations were formulated for the internal coatings and linings of carbon steel process vessels in the petroleum, petrochemical, and natural gas industries.

A series of technical documents on coatings and linings. This document aims to provide a mutually acceptable framework for carbon steel process vessels in the oil, petrochemical, and gas industries.

Standards for material selection, technical requirements, and testing and inspection methods for coating and lining systems. GB/T 46446 Petroleum, Petrochemical and Natural Gas Industries the document "Coating and Lining of Carbon Steel Process Vessels" is proposed to consist of two parts.

---Part 1: Technical Requirements. The purpose is to specify the structural design, substrate surface treatment, and other requirements for the coatings and linings inside carbon steel process vessels.

Technical requirements for key aspects such as coating application, testing and inspection.

---Part 2: Requirements and Guidelines for Coating and Lining System Selection. The aim is to specify the coatings and linings for carbon steel process vessels.

Choose the requirements and methods.

Because there are many types of coating and lining materials, and the construction process involves many steps, improper material selection or construction quality problems can lead to issues.

This has a serious impact on its actual application in the field. This document combines coating and lining corrosion protection technologies in the oil, petrochemical, and natural gas industries.

The specific application of carbon steel process vessels can effectively guide and standardize the work of designers, material manufacturers, construction companies, and users, ensuring the quality of the inner coating.

Key aspects of lining application are standardized and controlled to ensure the safe and reliable operation of carbon steel process vessels.

Carbon steel process vessels for the oil, petrochemical and natural gas industries Inner Coatings and Linings Part 1: Technical Requirements

1 Scope

This document specifies the requirements for oil, petrochemical, and natural gas industries to withstand complex operating conditions (significant pressure/temperature changes and/or potential corrosion conditions) or...

Surface treatment, materials, construction, inspection, and testing of coating and lining systems for carbon steel process vessels (corrosion processes, corrosive chemicals, etc.).

The minimum technical requirements.

This document applies to the coating and lining of carbon steel process vessels, as well as coating and lining systems with defects and performance degradation.

repair.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 531.1 Test methods for indentation hardness of vulcanized rubber or thermoplastic rubber—Part 1: Shore hardness tester method (Shore hardness) (GB/T 531.1-2008,ISO 7619-1:2004,IDT) GB/T 1768 Determination of abrasion resistance of paints and varnishes - Rotary rubber wheel method (GB/T 1768-2006, ISO 7784-2) 1997, IDT) GB/T 3854 Barcol Hardness Test Method for Reinforced Plastics GB/T 5210 Paints and varnishes - Adhesion test by pull-out method (GB/T 5210-2006, ISO 4624:2002, IDT) GB/T 6739 Paints and varnishes - Determination of film hardness using the pencil method (GB/T 6739-2022, ISO 15184:2020, MOD);

GB/T 6742 Paints and varnishes - Bending test (cylindrical shaft) (GB/T 6742-2007, ISO 1519:2002, IDT);

GB/T 8923.1 Visual assessment of surface cleanliness of steel before coating - Part 1: Uncoated steel Rust grades and treatment grades of steel surfaces after complete removal of original coatings (GB/T 8923.1-2011, ISO 8501-1.

2007, IDT)

GB/T 8923.3 Visual assessment of surface cleanliness of steel surfaces before coating - Part 3: Welds, edges and others Treatment levels for surface defects in the area (GB/T 8923.3-2009, ISO 8501-3:2006, IDT) GB 13200 Determination of turbidity in water (GB/T 13200-1991, ISO 7027:1984, IDT) GB/T 13288.4 Surface roughness characteristics of steel after blast cleaning and pretreatment before coating - Part 4.

ISO Surface Roughness Comparison Specimen Calibration and Surface Roughness Measurement Method. Stylus Method (GB/T 13288.4-2013, ISO 8503-) 4.1988, IDT) GB/T 13288.5 Surface roughness characteristics of steel after blast cleaning following surface treatment before coating - Part 5: Surface Roughness determination method. replication band method (GB/T 13288.5-2009, ISO 8503-5:2003, IDT) GB/T 13452.2 Determination of film thickness of paints and varnishes (GB/T 13452.2-2008, ISO 2808:2007, IDT) GB/T 17849 Test methods for non-metallic abrasives used in blast cleaning of steel surfaces before coating (GB/T 17849-1999, ISO 11127:1993, IDT) GB/T 18253 Types of inspection documents for steel and steel products (GB/T 18253-2018, ISO 10474:2013, IDT)