ASTM A213 TP316L U-Tube Bundle for Gas Chiller

As a trusted global supplier, GNEE possesses extensive experience in providing ASTM A213 TP316L U-tube bundles for gas coolers. Our products have been distributed to over 50 countries worldwide, with an annual export volume exceeding 1,000 tons. All raw materials are sourced from qualified steel mills and undergo 100% PMI (Positive Material Identification) verification; we provide original mill test reports (MTRs) corresponding to specific furnace heat numbers, fully compliant with EN 10204 3.1 or 3.2 standards.

 

TP316L stainless steel U-tubes feature a chemical composition containing ≤0.03% Carbon and 2.0–2.5% Molybdenum, ensuring exceptional resistance to chloride corrosion and long-term stability. During the U-bending process, we strictly control wall thinning to ≤10% and ovality to ≤8%, thereby guaranteeing that the tube bundles maintain their structural integrity and ensure a precise fit during installation. Following the bending process, all U-tubes undergo solution annealing treatment (at ≥1040°C followed by rapid quenching) to relieve residual stress, restore corrosion resistance properties, and ensure that no micro-cracks were generated during bending.

Regarding the quality of the connections between the tube bundles and the tube sheets, we employ precise tube expansion and welding techniques to ensure tight seals at the joints, thereby minimizing the risk of leakage under fluctuating pressure and temperature conditions. The manufacturing tolerances for our TP316L U-tube bundles strictly adhere to TEMA Class R standards, ensuring high precision in tube length, parallelism, and overall bundle geometry. This guarantees a smooth assembly process while significantly reducing installation lead times.

ASTM A213 TP316L U-Tube Bundle Specifications

Item	Detailed Parameters	Reference Standard / Remarks
Tube Material Grade	ASTM A213 TP316L	Seamless Tube
Outside Diameter (OD)	0.75 inch (19.05 mm)	Tolerance per ASTM A213
Wall Thickness (Thk)	0.065 inch (1.65 mm / 16 BWG)	Recommend confirming Minimum Wall (MW)
U-Bend Radius	Minimum radius typically ≥ 1.5 × OD	TEMA R-2.31
Wall Thinning at Bend	After thinning must meet minimum calculated wall thickness	API 660 requirement
Heat Treatment for U-Bend	For inner radius (R < 3.3 × OD), solution annealing is recommended	For stress relief of 316L

 

ASTM A182 F316L Tubesheet Specifications

Item	Specification Details
Material Grade	ASTM A182 F316L
Product Form	Forged Tubesheet
Manufacturing Process	Hot forging + machining
Heat Treatment	Solution Annealed
Surface Finish	Machined / Grooved / Cladded (if required)
Tube Hole Layout	30°, 45°, 60°, or 90°
Tube Pitch	Typically 1.25 × OD or as specified
Tube Hole Diameter	As per tube OD with clearance
Hole Tolerance	Standard fit / close fit
Ligament Efficiency	≥ design requirement
Tube-to-Tubesheet Joint	Expanded / Strength Weld / Seal Weld
Groove Type	Pass Partition Grooves / Seal Grooves
Corrosion Allowance	As specified (e.g., 3 mm)
Cladding (Optional)	SS316L / Alloy overlay
NDT Inspection	UT / PT / RT (if required)
Dimensional Tolerance	As per TEMA R / drawing
Design Code	TEMA / API 660 / ASME Section VIII

 

ASTM A213 TP316L U-Tube: Chemical Composition and Mechanical Properties

Element / Property	Requirement (ASTM A213 / A182)	Remarks
Carbon (C)	≤ 0.030%	Critical: Prevents weld sensitization and improves resistance to CO₂ corrosion
Nickel (Ni)	10.0 – 14.0%	Ensures austenitic stability
Molybdenum (Mo)	2.0 – 3.0%	Enhances pitting resistance (PREN ≥ 24)
Tensile Strength	≥ 485 MPa (70 ksi)	-
Yield Strength	≥ 170 MPa (25 ksi)	-

 

In a specific industrial gas cooler project, the TP316L U-tube bundle we supplied successfully reduced the installation rework rate by over 25% and extended the equipment's service life by more than 30%. This ensured safer, more efficient, and more durable equipment operation, while also significantly lowering maintenance costs.

Item	Technical Requirement	Reference Standard
Equipment Tag	EX-9001 Gas Chiller	-
Tube Bundle Type	U-Tube	TEMA Section 2
Design Code	ASME BPVC Section VIII, Div. 1 (2017)	Mandatory
Manufacturing Class	TEMA Class R (Refinery / Severe Service)	TEMA R
Industry Standard	API 660 (Shell-and-Tube Heat Exchangers)	Widely applied
Client Specification	PPL Standard PDP-ME-SP-002 Rev. A	Priority governing document

 

Inspection and Testing Requirements

Item	Technical Requirement	Reference Standard
Non-Destructive Testing (NDT)	100% Eddy Current Testing (ET) or Ultrasonic Testing (UT) for tubes	ASTM A213
Weld Inspection	100% Liquid Penetrant Testing (PT) for tube-to-tubesheet welds	ASME Section VIII, Div. 1, Appendix 8
Material Identification	100% PMI (Positive Material Identification)	API 660
Tubesheet Inspection	100% Ultrasonic Testing (UT) for forgings	ASME Section VIII, Div. 1 / SA-388
Pressure Test	Hydrostatic test at 1.3 × design pressure (1840 psig)	ASME Section VIII, Div. 1 UG-99
Drying Treatment	Thorough drying after hydrotest (to prevent EG contamination)	API 660

If you have specific project requirements, we welcome your orders. GNEE maintains an extensive inventory for you to choose from; for detailed chemical compositions or free samples, please contact our factory immediately. We offer competitive pricing and exceptional service.
Our products are packaged using waterproof paper and steel strapping, meeting standard export requirements for sea freight and are suitable for various modes of transport; custom packaging is also available upon request.