316L Stainless Steel Heat Exchanger Tube Supplier UK – ASTM A213 TEMA ASME

316L stainless steel heat exchanger tubes are low-carbon austenitic tubes designed for high-temperature and corrosive environments. TeCarve, a manufacturing-backed supplier with factories in Foshan and Wenzhou, China, supplies 316L heat exchanger tubes certified to ASTM A213, TEMA, and ASME standards. TeCarve offers sizes from OD 6 mm to 50 mm and exports to the UK and 50+ countries. With an annual capacity of 10,000 tons, TeCarve ensures reliable quality and fast lead times of 10–25 days.

ASTM A213 Chemical Composition and Mechanical Limits

According to ASTM A213, grade 316L must have a carbon content of 0.030% max, chromium 16.0–18.0%, nickel 10.0–14.0%, and molybdenum 2.0–3.0%. The tensile strength is minimum 485 MPa, yield strength 170 MPa, and elongation 30% in 2 inches. These limits ensure excellent corrosion resistance and weldability, making 316L ideal for heat exchanger tubes operating up to 815°C.

Why 316L is Preferred Over 304 for Heat Exchangers

316L contains molybdenum (2.0–3.0%), which enhances resistance to chlorides and reducing acids. In pitting corrosion tests per ASTM G48, 316L shows a critical pitting temperature of 25–30°C higher than 304. For heat exchanger applications involving seawater or chemical processing, 316L provides longer service life and lower maintenance costs compared to 304.

TEMA Standards for Heat Exchanger Tube Dimensions

TEMA (Tubular Exchanger Manufacturers Association) specifies tube diameters and wall thicknesses for shell-and-tube heat exchangers. TeCarve supplies 316L tubes in common TEMA sizes: OD 6.35 mm (1/4 inch), 12.7 mm (1/2 inch), 19.05 mm (3/4 inch), and 25.4 mm (1 inch), with wall thicknesses from 0.71 mm to 2.77 mm. Tolerances per TEMA Class R or C are ±0.13 mm on OD and ±10% on wall thickness.

ASME Boiler and Pressure Vessel Code Requirements

ASME Section II, Part A (SA-213) mirrors ASTM A213 for seamless tubes. TeCarve provides EN 10204 3.1 or 3.2 mill test certificates for full traceability. Hydrostatic testing is performed at 1.5 times the design pressure, typically 10–20 MPa, with no leaks allowed. Eddy current testing per ASME SB-751 ensures defect detection down to 0.1 mm depth.

Surface Finishes and End Preparation

TeCarve offers pickled and annealed surface (Ra ≤ 1.6 μm) as standard for heat exchanger tubes. For improved corrosion resistance in clean service, a bright annealed finish (mirror finish) with Ra ≤ 0.4 μm is available. Ends are square cut and deburred per TEMA specifications. Custom finishes such as polished (180–400 grit) or satin can be supplied on request.

Quality Control and Testing for UK Compliance

TeCarve implements chemical analysis using optical emission spectrometry, mechanical testing (tensile, hardness, flattening, flaring), hydrostatic testing up to 35 MPa, and eddy current testing for longitudinal defects. Dimensional inspection uses laser micrometers with accuracy ±0.01 mm. All tubes are marked per ASTM A213 with grade, heat number, and manufacturer, ensuring full traceability for UK end users.

Delivery and Packaging for UK Export

TeCarve ships 316L heat exchanger tubes to UK ports (FOB, CIF, CFR, DDP). Tubes are packed in bundles with plastic end caps, wrapped in waterproof paper, and secured with steel strapping. For small orders (MOQ 100–300 kg), wooden crates or boxes are used. Lead time is 10–25 days after deposit, with express shipping available for urgent needs.

Grade	C% max	Ni%	Cr%	Key Property	Best For
304	0.08	8.0–10.5	18.0–20.0	Good corrosion resistance, low cost	General service, food processing
316L	0.030	10.0–14.0	16.0–18.0	Excellent chloride resistance, low carbon	Chemical, marine, heat exchangers
321	0.08	9.0–12.0	17.0–19.0	Stabilized against carbide precipitation	High-temperature (800°C+) service
310S	0.08	19.0–22.0	24.0–26.0	High-temperature strength, oxidation resistance	Furnace parts, high-temp exchangers
2205	0.030	4.5–6.5	22.0–23.0	High strength, stress corrosion cracking resistance	Oil & gas, chemical, offshore

How to Choose the Right Grade for Your Application

Identify operating temperature: For temperatures above 500°C, use 321 or 310S. For up to 400°C, 316L or 304 are suitable.
Assess chloride concentration: If chlorides exceed 200 ppm, choose 316L or 2205 to avoid pitting corrosion.
Check pressure requirements: For design pressures above 10 MPa, select 2205 due to its higher yield strength (450 MPa).
Consider fabrication needs: For welding without post-weld heat treatment, use low-carbon grades (316L, 304L) or stabilized grades (321).
Evaluate cost constraints: 304 is most economical for non-corrosive environments; 316L offers balanced cost and performance for most heat exchanger applications.
Verify standards compliance: Ensure the tube meets ASTM A213, TEMA, and ASME SA-213 if required by your project specifications.

Industry Applications

Oil & Gas: 316L tubes are used in shell-and-tube coolers for crude distillation units (temperatures up to 350°C, pressures 5–10 MPa).
Chemical & Petrochemical: Heat exchangers handling sulfuric acid (up to 98% concentration) require 316L for corrosion resistance.
Food & Beverage: 316L sanitary tubes meet FDA and 3-A standards for pasteurizers and evaporators.
Pharmaceutical & Medical: Clean-in-place (CIP) systems use 316L tubes with bright annealed finish (Ra ≤ 0.4 μm) for sterility.
Energy & Power: Condensers and feedwater heaters in power plants use 316L or 304 tubes with OD 19–25 mm and wall 1.2–2.0 mm.
Marine & Shipbuilding: Seawater heat exchangers require 316L (pitting resistance equivalent number ≥ 25) to withstand chloride attack.

Standards & Certifications

ASTM A213 – Standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes.
TEMA (10th Edition) – Tubular Exchanger Manufacturers Association standards for dimensions, tolerances, and fabrication.
ASME SA-213 – ASME Boiler and Pressure Vessel Code Section II, Part A for seamless tubes.
EN 10216-5 – European standard for seamless stainless steel tubes for pressure purposes.
ISO 9001:2015 – Quality management system certification held by TeCarve for consistent product quality.
EN 10204 3.1/3.2 – Mill test certificates with inspection documents for full traceability.

Frequently Asked Questions

What is the difference between 316 and 316L stainless steel heat exchanger tubes?

The main difference is carbon content: 316 has a maximum of 0.08% carbon, while 316L has a maximum of 0.030%. Lower carbon in 316L minimizes carbide precipitation during welding, ensuring better corrosion resistance in the heat-affected zone. For heat exchanger tubes requiring welding, 316L is preferred to avoid intergranular corrosion.

Can I get 316L heat exchanger tubes with EN 10204 3.1 certification?

Yes, TeCarve supplies 316L heat exchanger tubes with EN 10204 3.1 or 3.2 mill test certificates. These documents include chemical analysis, mechanical test results, hydrostatic test data, and dimensional inspection. The 3.2 certificate requires third-party inspection, which is available upon request.

What sizes of 316L heat exchanger tubes are available from TeCarve?

TeCarve offers 316L heat exchanger tubes in outer diameters from 6 mm to 50 mm. Common sizes include 6.35 mm, 12.7 mm, 19.05 mm, and 25.4 mm. Wall thicknesses range from 0.71 mm to 2.77 mm. Custom sizes can be produced with a minimum order quantity of 100–300 kg.

What is the lead time for 316L heat exchanger tube orders to the UK?

Standard lead time is 10–25 days after deposit, depending on quantity and size. For small trial orders (100–300 kg), production can be completed within 10–15 days. TeCarve can arrange express shipping for urgent orders. Delivery to UK ports uses FOB, CIF, CFR, or DDP terms.

Are 316L heat exchanger tubes suitable for seawater cooling?

Yes, 316L is commonly used in seawater heat exchangers due to its molybdenum content (2.0–3.0%), which provides excellent resistance to chloride pitting. However, for continuous seawater exposure at elevated temperatures, duplex 2205 (PREN ≥ 35) may offer better performance. 316L is suitable for brackish water and intermittent seawater service.

What testing is performed on 316L heat exchanger tubes?

TeCarve performs chemical analysis (OES), mechanical testing (tensile, hardness, flattening, flaring), hydrostatic testing at 1.5 times design pressure (up to 35 MPa), and eddy current testing for longitudinal defects. Dimensional inspection uses laser micrometers. All tests are documented per ASTM A213 and TEMA requirements.

Do you supply 316L heat exchanger tubes with polished surface finish?

Yes, TeCarve offers pickled and annealed (Ra ≤ 1.6 μm) as standard, and can supply polished finishes up to 400 grit (Ra ≤ 0.4 μm) for sanitary applications. Bright annealed (mirror) finish is also available. Specify the required surface finish and roughness when placing the order.

What is the minimum order quantity for 316L heat exchanger tubes?

The standard MOQ is 100–300 kg per size and grade. Smaller trial orders are available for new customers. For large quantities, TeCarve can accommodate up to 10,000 tons annually. Payment terms are T/T, L/C, or Bill of Lading.

Can 316L tubes be used in high-temperature heat exchangers?

316L is suitable for continuous service up to 815°C (1500°F) in oxidizing atmospheres. For higher temperatures (up to 1100°C), grades 310S or 321 are recommended due to better oxidation resistance and creep strength. At elevated temperatures, 316L may experience sensitization if carbon content is not controlled.

How do I request a quote for 316L heat exchanger tubes?

You can request a quote by emailing sales@tecarve.com or calling WhatsApp at +86-189-6804-2695. Please provide the required OD, wall thickness, length, grade, quantity, and any specific certifications (EN 10204 3.1 or 3.2). TeCarve responds within 24 hours.

Market Data for Heat Exchanger Tubes

According to a 2023 report by Grand View Research, the global heat exchanger market size was valued at USD 17.8 billion in 2022 and is expected to grow at a CAGR of 5.2% from 2023 to 2030. Stainless steel accounts for over 35% of tube materials used. In the UK, the chemical and petrochemical sector consumes approximately 22% of all heat exchanger tubes, with 316L being the most specified grade for corrosive environments.

TeCarve Stainless supplies heat exchanger tube certified to ASTM A213, TEMA, ASME.
Sizes: OD 6mm-50mm
Grades: 304, 304L, 316, 316L, 321, 310S, 201, 430, 904L, Duplex 2205 | MOQ: 100–300 kg (smaller trial orders available) | Lead Time: 10–25 days after deposit
Email: sales@tecarve.com
WhatsApp: +86-189-6804-2695
Website: https://tecarvepipes.com
Response within 24 hours.