Chemical storage tanks handle corrosive liquids and long-term static pressure.
Duplex stainless steel is a mainstream material for high-grade chemical tanks.
It combines high mechanical strength and excellent local corrosion resistance.
Welded joints are the weakest parts of tank structural systems.
Unstandard groove design causes incomplete penetration and weld defects.
Poor groove precision leads to leakage risk and shortened tank service life.
Compliant groove standards ensure welding stability and long-term operational safety.
Duplex steel has strict heat input control requirements during welding.
Improper groove shapes cause excessive local heat accumulation.
Unreasonable gaps change ferrite and austenite phase ratios.
Damaged phase balance reduces corrosion resistance and toughness.
Different from ordinary stainless steel, it needs standardized groove parameters.
Precise design maintains original material mechanical properties.
Suitable for thin and medium duplex steel plates under 12mm.
Features simple processing and easy welding gun access.
Widely used for conventional tank wall ring and longitudinal seams.
Applied for thick plates over 12mm in high-pressure tanks.
Balances heat input on both sides to reduce welding deformation.
Improves full penetration quality of thick-wall welds.
Adopted for high-precision anti-corrosion tank key joints.
Reduces welding filler metal and overall heat input.
Effectively avoids duplex steel thermal aging problems.
Control groove angle between 55 and 60 degrees for general butt joints.
Keep root gap within 2mm to avoid incomplete fusion or burn-through.
Limit root face thickness from 1mm to 2mm for stable root forming.
Match groove type strictly according to actual plate thickness.
Unify parameters for batch tank production to ensure consistent quality.
Follow API 650 standards for atmospheric chemical storage tanks.
Comply with ASME VIII rules for pressure-bearing tank groove design.
Adopt AWS welding specifications for duplex steel joint preparation.
Meet local industrial welding quality acceptance standards.
Use mechanical machining for high-precision duplex steel grooves.
Avoid rough thermal cutting to prevent surface oxidation layers.
Fully polish groove surfaces to remove burrs and impurities.
Clean oil, dust and oxide before formal welding.
Ensure clean welding area for stable weld microstructure.
Coordinate groove size with low heat input welding process.
Control interpass temperature below 150℃ during welding.
Avoid narrow and deep grooves causing heat concentration.
Reserve reasonable space for gas protection and slag removal.
Guarantee uniform weld formation and internal compactness.
Excessively narrow gaps lead to incomplete root penetration.
Overlarge grooves increase welding heat input and material loss.
Unsymmetrical double-sided grooves cause unbalanced deformation.
Unpolished groove surfaces trigger tiny weld pore defects.
Non-standard designs reduce tank corrosion resistance lifespan.
Check weld appearance for no cracks, pores or slag inclusions.
Conduct ultrasonic or radiographic detection for key joints.
Verify weld mechanical performance and corrosion resistance.
Ensure overall consistency with tank design requirements.
Duplex stainless steel tank groove design follows strict industrial standards.
Reasonable groove type and parameter matching controls welding heat input.
Standardized processing protects duplex steel dual-phase microstructure.
Scientific groove design eliminates joint leakage and structural risks.
It is the basic guarantee for safe and long-term service of chemical storage tanks.
The above content was generated by AI assistance.
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