SSAW (spiral seam submerged arc welded steel pipe) requires attention to the following key points during construction to ensure construction quality and safety:

1. Preparation before construction

Drawing review:

Construction personnel should carefully review the construction drawings, understand the specifications, materials, connection methods, anti-corrosion requirements, etc. of the pipelines.

Material inspection:

Conduct a visual inspection of the SSAW Steel Pipes entering the site to ensure that there are no defects such as cracks, rust, oil stains, etc. on the surface of the steel pipes.

Check whether the wall thickness, diameter, and other dimensions of the steel pipe meet the design requirements.

Equipment preparation:

Prepare the necessary equipment for construction, such as welding machines, cutting machines, anti-corrosion spraying equipment, etc., and ensure that the equipment functions properly.

2. Precautions during the construction process

Steel pipe cutting and groove processing:

Use appropriate cutting tools and methods to ensure that the steel pipe cut is flat and free of burrs.

According to the requirements, perform groove processing to ensure that the groove angle, blunt edge, etc. meet the welding requirements.

Welding and weld seam inspection:

Adopting double-sided submerged arc welding or single-sided welding double-sided forming technology to ensure the quality of the weld seam.

The appearance of the weld seam should be flat, smooth, and free of defects such as cracks, slag inclusions, and porosity.

Perform non-destructive testing on welds, such as ultrasonic testing, radiographic testing, etc., to ensure that there are no defects inside the welds.

Anti corrosion treatment:

Apply anti-corrosion coatings such as paint, rubber, plastic, etc. on the surface of steel pipes to reduce the risk of corrosion.

The coating should be uniform, continuous, and free of omissions, bubbles, peeling, and other phenomena.

Pipeline installation and fixation:

Install and fix the pipeline according to the design drawings.

Ensure that the installation position of the pipeline is accurate, firmly fixed, and avoid displacement or deformation of the pipeline during use.

3. Inspection and acceptance after construction

Appearance inspection:

Conduct visual inspection on the completed pipelines to ensure that the welds, coatings, etc. meet the design requirements.

Pressure test:

Conduct pressure tests on pipelines to verify their pressure bearing capacity and sealing performance.

The pressure test should be conducted strictly in accordance with the design requirements and relevant standards.

Acceptance and recording:

After the construction is completed, acceptance should be organized to ensure that the pipeline quality meets the design requirements and relevant standards.

Keep good records of construction and archive quality documents for future reference.

4. Safety and environmental protection measures

Safety training:

Construction personnel should receive safety training and understand the safety requirements and precautions during the construction process.

Personal protection:

Construction personnel should wear appropriate personal protective equipment, such as safety helmets, protective goggles, gloves, etc.

On site safety:

Clear safety warning signs should be set up on the construction site to ensure the safety of the construction area.

Non construction personnel are prohibited from entering the construction area.

Environmental protection measures:

Environmental protection measures should be taken during the construction process, such as reducing noise and dust pollution.

Construction waste should be properly disposed of to avoid polluting the environment.

In summary, SSAW steel pipes need to pay attention to multiple aspects during construction, including preparation before construction, precautions during construction, inspection and acceptance after construction, as well as safety and environmental protection measures. Through strict management and correct measures, construction quality and safety can be ensured to meet engineering requirements.

Regarding the precautions for SSAW steel pipes during construction, in addition to the previously mentioned content, the following points can be added:

5. Construction measures in special environments

Low temperature environment:

When constructing in low-temperature environments, preheating measures should be taken, such as using heating equipment to preheat steel pipes and welds, to prevent defects such as cracks during the welding process.

When welding in low-temperature environments, welding materials and welding processes suitable for low-temperature environments should be selected.

High temperature environment:

During construction in high temperature environments, heatstroke prevention and cooling measures should be taken, such as providing sufficient drinking water for construction personnel and setting up shading facilities.

When welding in high temperature environments, attention should be paid to the cooling and insulation of the weld seam to prevent overheating or thermal cracking.

Wet environment:

When constructing in a humid environment, attention should be paid to the drying treatment of steel pipes and welds to prevent moisture from corroding them.

When welding in a humid environment, dehumidification equipment or other measures should be taken to reduce the humidity in the air.

6. Quality control during construction

Weld quality control:

The quality of welds directly affects the safety and service life of pipelines. Therefore, the quality of the weld seam should be strictly controlled during the welding process, such as the appearance quality and internal quality of the weld seam.

The appearance quality of the weld seam should meet the design requirements and relevant standards, and the internal quality should be verified through non-destructive testing.

Coating quality control:

The quality of the coating has a significant impact on the anti-corrosion performance of steel pipes. Therefore, the quality of the coating, such as thickness, uniformity, adhesion, etc., should be strictly controlled during the coating construction process.

After the coating construction is completed, quality inspections such as coating thickness testing and adhesion testing should be carried out.

Construction records and quality control:

During the construction process, construction records should be kept, including welding parameters, coating parameters, inspection records, etc. These records are of great significance for subsequent quality control and problem tracing.

At the same time, a quality control system should be established to control and inspect the quality of each link in the construction process, ensuring that the construction quality meets the design requirements and relevant standards.

7. Safety precautions during construction

Electrical safety:

During the construction process, attention should be paid to electrical safety, such as using qualified electrical equipment and cables, avoiding overloading and short circuits of electrical equipment, etc.

Construction personnel should receive electrical safety training, understand the correct use of electrical equipment and safety precautions.

Mechanical safety:

When using mechanical equipment for construction, attention should be paid to mechanical safety, such as equipment maintenance and operation standards.

Construction personnel should be familiar with the performance and operation methods of mechanical equipment, and strictly follow the operating procedures for operation.

Fire safety:

During the construction process, attention should be paid to fire safety, such as prohibiting smoking and the use of open flames on the construction site.

Adequate fire-fighting equipment and devices should be provided, and regular inspections and maintenance should be carried out.

In summary, SSAW steel pipes need to pay attention to multiple aspects during construction, including preparation before construction, precautions during construction, inspection and acceptance after construction, construction measures in special environments, quality control during construction, and safety precautions during construction. Through strict management and correct measures, construction quality and safety can be ensured to meet engineering requirements.