The identification of steel pipes is an integral part of their production and use process, encapsulating various crucial information that aids users in correctly identifying and utilizing the pipes. Below is a detailed explanation of steel pipe identification translated into English:
I. Identification Content
The identification of steel pipes typically includes the following key elements:
- Manufacturer’s Name: This refers to the name of the enterprise or factory that produced the steel pipe, helping users confirm the production source.
- Standard Number: It indicates the mandatory standards or technical conditions of the country or region that the steel pipe complies with, helping users verify whether the steel pipe meets the standards of their country or region.
- Material: It refers to the type of raw material used to make the steel pipe, aiding users in assessing its quality and suitable applications.
- Specification: It includes dimensional parameters such as the outer diameter, wall thickness, or length of the steel pipe, helping users confirm its compliance with usage requirements.
- Production Year and Batch: It indicates the production year and batch of the steel pipe, aiding users in verifying its quality, production organization, and quality control.
Additionally, for seamless steel pipes, the identification should also include the trademark, product grade, traceability identification number, or phone number. For steel pipes specifically used in applications such as oil, natural gas, and 3PE anti-corrosion, there should also be grade markings.
II. Identification Methods
The identification methods for steel pipes mainly include the following:
- Metal Identification: Printing marks on steel pipes using a printing machine or stamping machine, usually at the ends or one side of the pipe. This method provides clear, durable, and fade-resistant markings.
- Paint Identification: Spraying marks on steel pipes, usually at the ends or one side of the pipe. The content of paint identification is similar to metal identification but may be more prone to fading or wear due to environmental factors.
- Labels or Tags: For container packaging, welded packaging with brackets, or thin-walled seamless steel pipe assemblies, labels or tags can be attached to the containers, brackets, or outer layers of thin-walled seamless steel pipes to provide necessary identification information.
III. Identification Location and Requirements
- Location: The identification should be located in a prominent position on the steel pipe for easy viewing and identification. For steel pipes with an outer diameter of not less than 36mm, each marking method should be applied starting from a point not less than 200mm from the end of the seamless steel pipe.
- Requirements: The identification should be eye-catching, secure, clear, standardized, and fade-resistant. Additionally, the content of the identification should be accurate and correspond to the actual attributes of the steel pipe.
IV. Special Identification
Apart from the aforementioned conventional identification, steel pipes may also require special identification in certain specific situations:
- Pipeline Color Identification: According to GB7231-2003 “Basic Identification Colors, Identification Symbols, and Safety Signs for Industrial Pipelines,” steel pipes should be color-coded based on the type and state of the fluid they convey. For example, bright green is used for media such as steam that are hot and pose a burn hazard to humans; bright red is used for air, etc.
- Hazardous Chemical Identification: Steel pipes conveying hazardous chemicals should be marked with hazard signs. The representation method is to paint a 150mm wide yellow stripe on the pipeline, with 25mm wide black color rings or bands on both sides of the yellow stripe.
In summary, the identification of steel pipes is a crucial aspect of their production and use process. Correct identification content, methods, and locations aid users in correctly identifying and using steel pipes, ensuring their safety and reliability.
