The manufacturing of asphalt tanks involves heavy steel plate rolling, tank assembly and precision welding processes. Welding quality, dimensional accuracy and structural tightness directly determine the anti-leakage performance and service life of finished storage tanks. Ambient temperature fluctuation, floating dust and welding flue gas in the workshop will lead to unstable welding metallographic structure, welding pore defects, assembly dimension deviation and poor coating adhesion after post-treatment. Reliable production quality depends on scientific layout of temperature control and flue gas exhaust pipelines in multi-station welding workshops, as well as standardized constant-temperature dust-free operation procedures for tank assembly and welding. Traditional fabrication workshops lack integrated environmental management. Unbalanced temperature distribution and accumulated welding smoke cause unstable welding quality between batches, which cannot meet the high safety requirements of asphalt storage equipment used in mixing stations and road terminals.

1. Production Defects Caused by Poor Workshop Environment and Irregular Operations

Without systematic temperature control pipeline arrangement, large temperature difference exists among different welding stations. Rapid temperature variation causes uneven cooling of welding seams, generating residual welding stress, cold cracks and incomplete fusion defects. Insufficient flue gas exhaust pipelines fail to timely extract welding smoke and metal fumes. Suspended particles adhere to the assembly joint surfaces, forming inclusions inside welds and triggering potential leakage risks. Non-standard tank assembly leads to inconsistent gap alignment and staggered edges. Random welding sequence and uncontrolled heat input further aggravate tank wall deformation, flatness out of tolerance and poor sealing performance after long-term high-temperature operation.

2. Systematic Layout Scheme of Workshop Temperature Control and Flue Gas Exhaust Pipelines

The multi-station asphalt tank welding workshop implements partition environmental management, divided into steel plate preprocessing zone, tank body assembly zone, automatic welding zone, post-weld inspection zone and semi-finished product storage zone. Circulating constant-temperature air supply pipelines are arranged around each operation station to reduce regional temperature difference and avoid rapid temperature change of steel plates. Independent negative-pressure flue gas exhaust pipelines are installed above welding positions and joint assembly areas. The pipeline network eliminates airflow dead zones and prevents cross diffusion of welding smoke between stations. Harmful flue gas is intensively transported to purification equipment. The whole layout builds a stable constant-temperature and low-pollution working environment for tank assembly and precision welding.

3. Constant Temperature Standardized Tank Assembly Operation Specification

Steel plates and prefabricated components are placed in the constant-temperature buffer area in advance to balance material temperature before assembly. Uniform positioning supports are adopted to prevent local bending deformation of tank plates. Strictly control assembly clearance, staggered edge and circularity tolerance according to drawing standards. Adjust jacking and clamping force evenly to avoid forced assembly which introduces extra residual stress. After positioning, conduct repeated dimensional inspection before welding. Isolate assembled components from dust and airflow impact to maintain stable assembly benchmark for subsequent welding procedures.

4. Dust-free Standardized Welding Operation Specification

Turn on constant temperature circulation system and flue gas exhaust equipment for pre-operation for a specified time before welding. Thoroughly clean rust, oil stains and dust on welding grooves and adjacent areas. Stabilize welding current, voltage and travel speed to control heat input. Avoid intermittent irregular welding which causes uneven seam forming. When welding is suspended for a long time, keep components under constant temperature conditions to prevent temperature shock. After welding, clean weld surface slag in a low-dust environment. All operation steps are recorded to realize traceability of welding parameters and environmental conditions.

5. Synergistic Advantages of Pipeline Layout and Standardized Operation Specifications

Optimized temperature control and flue gas exhaust pipeline layout stabilize workshop microenvironment, restrain welding stress and eliminate particle pollution sources. Standardized constant-temperature assembly and dust-free welding reduce human-induced quality fluctuations. The combination of environmental infrastructure upgrading and standardized on-site operation effectively suppresses common defects such as welding pores, cold cracks, tank wall deformation and assembly dimension deviation, improving structural strength and sealing reliability of asphalt tanks.

6. Application Value in Pressure Storage Equipment Manufacturing

The environmental transformation scheme and operation standards are suitable for mass production of vertical and horizontal asphalt tanks applied in asphalt mixing plants, highway construction sites, asphalt logistics terminals and municipal engineering. Stable workshop environment and standardized workflows improve welding seam integrity and dimensional consistency, reduce rework rate, and satisfy medium and high-pressure sealed storage requirements of high-temperature liquid asphalt.

Conclusion

High-quality fabrication of asphalt tanks relies on reasonable temperature control and flue gas exhaust pipeline layout in multi-station welding workshops, as well as constant temperature dust-free standardized tank assembly and welding operation specifications. Optimized environmental facilities matched with standardized field operations effectively control various exogenous quality risks, providing solid environmental guarantee for manufacturing safe and durable asphalt storage equipment.