ASME GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers for Pipeline Project
YUHONG specialize in manufacturing high-quality ASME Gas / Gas SA270 L7 shell and TP304L tube heat exchangers. Our commitment to excellence ensures optimal performance and reliability for various applications.
Materials of GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers
| Material List (Bill of Materials) |
| Category |
Component / Part Name |
Material Specification |
| SHELL COVER |
BARREL |
SA516 Gr.70N |
| COVER |
SA516 Gr.70N |
| FLANGE |
SA350 LF2 CL.1 |
| CHANNEL |
BARREL |
SA516 Gr.70N + 3mm S.S.304L CLAD |
| BODY FLANGE |
SA350 LF2 CL.1 + 3mm S.S.304L CLAD |
| COVER FLANGE |
SA350 LF2 CL.1 + 3mm S.S.304L CLAD |
| FLAT COVER |
SA350 LF2 CL.1 + 3mm S.S.304L CLAD |
| NOZZLE FROM PIPE |
SA240 304L |
| NOZZLE FROM PLATE |
SA516 Gr.70N |
| NOZZLE FLANGE |
SA516 Gr.70N |
| NOZZLE SELF REINFORCE |
SA350 LF2 CL.1 |
| PARTITION PLATE |
SA240 304L |
| FLOATING HEAD |
COVER |
SA213 TP304L |
| FLANGE |
SA350 LF2 CL.1 + 3mm S.S.304L CLAD |
| SPLIT RING |
SA240 304L |
| TUBE BUNDLE |
TUBE |
SA213 TP304L |
| TUBE SHEET (CLAD T.S.) |
SA350 LF2 CL.1 + 3mm S.S.304L CLAD |
| BAFFLE / SUPPORT / IMP. PLATE |
SA240 304L |
| TIE ROD & SPACER |
SA479 Gr.304L / SA213 TP304L |
Primary Design Codes & Classification of GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers
The equipment is designed and shall be constructed in strict accordance with the following major international standards:
Pressure Vessel Code: ASME Boiler and Pressure Vessel Code, Section VIII, Division 1.
Heat Exchanger Standard: TEMA (Tubular Exchanger Manufacturers Association) Class R (for severe service requirements).
Industry Standard: API Standard 660 (Shell-and-Tube Heat Exchangers for General Refinery Services).
Material/Metallurgy: Applicable NACE standards for service in potentially corrosive environments.
Load Design of GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers
Seismic Design: Designed for seismic loads as per IBC 2018.
Wind Load Design: Designed for wind loads as per ASCE/SEI 7-22.
Design Conditions of GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers
Shell Side:
Design Pressure (Internal): 56 barg
Design Temperature: 85°C
Hydrostatic Test Pressure: 72 barg
Tube Side:
Design Pressure (Internal): 58 barg
Design Temperature: 145°C
Hydrostatic Test Pressure: 75.4 barg
Minimum Design Metal Temperature (MDMT): Both shell and tube sides have an MDMT of -41°C. This mandates the use of materials qualified for low-temperature service.
Service & Process Parameters of GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers
Shell Side Fluid: Gas
Tube Side Fluid: Compressed Gas
Number of Passes:
Shell Side: 1 Pass
Tube Side: 2 Pass
Fluid Density (Inlet / Outlet):
Shell Side: 61.2 kg/m³ / 48.5 kg/m³
Tube Side: 53.9 kg/m³ / 62.6 kg/m³
Inspection of GAS GAS SA270 L7 Shell and TP304L Tube Heat Exchangers
Radiographic Examination: 100% Radiographic Testing (RT).
Joint Efficiency: A joint efficiency factor of 1.0 is applied for both shell and head seams, permitted due to the full radiography.
Post Weld Heat Treatment (PWHT)
Impact Testing
Corrosion Allowance:
Shell Side: 3 mm
Tube Side: 0 mm (indicating a corrosion-resistant material is specified for wetted parts).