Stainless Steel Heat Exchanger Tube ASME SA213 TP304L ASTM A262 Practice E

​​YUHONG GROUP​​ specializes in manufacturing premium ​​Stainless Steel Heat Exchanger Tubes​​ compliant with ​​ASME SA213 TP304L​​ and ​​ASTM A262 Practice E​​ standards. Our tubes are engineered for superior corrosion resistance, high-temperature stability, and longevity in demanding applications like petrochemical plants, power generation, and HVAC systems.

1. SA213 TP304L Applicable Standards​​

• ​​ASME SA213​​: Governs material and manufacturing requirements for seamless stainless steel tubes in boilers, superheaters, and heat exchangers.
• ​​ASME B31.1/B31.3​​: Specifies post-installation heat treatment criteria for pressure piping systems.
• ​​ASME Section VIII Div.1​​: Defines welding and thermal treatment protocols for pressure vessel construction.

​​2. SA213 TP304L Heat Treatment Requirements​​

• ​​Cold bending​​: Solution annealing is mandatory if deformation exceeds 15% to mitigate residual stresses and restore corrosion resistance.
• ​​Hot bending​​: No additional treatment required when bent within the austenitic stabilization range (900-1150°C). Avoid prolonged exposure to sensitization zones (450-850°C) to prevent carbide precipitation.
• ​​Critical service​​: Thermal processing is essential for pipes exposed to corrosive media or extreme pressure/temperature conditions.

​​3. SA213 TP304L Thermal Processing Parameters​​

​​(1) Solution Annealing (Preferred)​​

• ​​Temperature​​: 1040-1120°C (1904-2048°F)
• ​​Soaking duration​​: Minimum 30 minutes, with 1 minute per mm wall thickness for uniform heating.
• ​​Cooling method​​: Rapid quenching (water) or forced air cooling to stabilize austenitic microstructure.

​​(2) Stress Relieving (Optional)​​

• ​​Temperature​​: 425-480°C (797-896°F)
• ​​Soaking duration​​: 1 hour per 25mm wall thickness (minimum 1 hour).
• ​​Cooling method​​: Ambient air cooling.

​​4. Critical Considerations​​

• ​​Sensitization control​​: Despite TP304L's low carbon content (≤0.03%), limit dwell time in 450-850°C range.
• ​​Dimensional stability​​: Use fixtures during annealing to prevent warping.
• ​​Post-treatment inspection​​: Mandatory hardness testing (HB ≤200) and ASTM A262 Practice E intergranular corrosion evaluation.

​​5. Normative References​​

• ​​ASME SA213 Table 6​​: Specifies solution annealing parameters for austenitic stainless steels.
• ​​ASME B31.3 Table 331.1.1​​: Mandates annealing for cold-formed pipes with ≥15% deformation.

6. SA213 TP304L Similar post-bending heat treatment protocols

• ​​ASME SA213 TP304​​
• ​​ASME SA213 TP304H​​ (High-Temperature Grade)
• ​​ASME SA213 TP304N​​ (Nitrogen-Strengthened)
• ​​ASME SA213 TP304LN​​ (Low Carbon + Nitrogen)
• ​​ASME SA213 TP316​​
• ​​ASME SA213 TP316L​​
• ​​ASME SA213 TP316H​​
• ​​ASME SA213 TP316N​​
• ​​ASME SA213 TP316LN​​
• ​​ASME SA213 TP317​​
• ​​ASME SA213 TP317L​​
• ​​ASME SA213 TP321​​ (Ti-Stabilized)
• ​​ASME SA213 TP321H​​
• ​​ASME SA213 TP347​​ (Nb-Stabilized)
• ​​ASME SA213 TP347H​​
• ​​ASME SA213 TP348​​ (Nuclear-Grade Nb-Stabilized)
• ​​ASME SA213 TP348H​​
• ​​ASME SA213 TP309​​ (High Cr/Ni for Oxidation Resistance)
• ​​ASME SA213 TP309S​​
• ​​ASME SA213 TP309H​​
• ​​ASME SA213 TP310​​
• ​​ASME SA213 TP310S​​
• ​​ASME SA213 TP310H​​
• ​​ASME SA213 TP310MoLN​​ (Mo and N Enhanced)
• ​​ASME SA213 TP317LMN​​ (High Mo/N for Corrosion Resistance)
• ​​ASME SA213 S31803​​ (Duplex 2205 – Requires 1100°C Quench)
• ​​ASME SA213 S32205​​ (Super Duplex)
• ​​ASME SA213 S32750​​ (Duplex 2507)
• ​​ASME SA213 TP405​​ (Low-Cr Ferritic)
• ​​ASME SA213 TP409​​ (Automotive Exhaust Grade)
• ​​ASME SA213 TP430​​ (High-Cr Ferritic)
• ​​ASME SA213 TP439​​ (Ti-Stabilized Ferritic)
• ​​ASME SB622 N06625​​ (Inconel 625)
• ​​ASME SB622 N08825​​ (Incoloy 825)
• ​​ASME SB622 N08020​​ (Alloy 20)
• ​​ASME SB622 N10276​​ (Hastelloy C276)
• ​​ASME SB622 N06022​​ (Hastelloy C22)
• ​​ASME SB622 N06600​​ (Inconel 600)
• ​​ASME SB622 N06601​​ (Inconel 601)
• ​​ASME SB622 N08800​​ (Incoloy 800)