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ASTM A269 316L Austenitic Steel Geothermal Coiled Tubing 3/8”
Specifications
Item | Details |
Product Type | Geothermal Coiled Tubing |
Material Grade | TP316/ TP316L/ TP316Ti (304/304L, S31803/2205, S32750/2507, alloy 825, alloy 625 available) |
Outer Diameter | 3.18-38.1mm (1/8"-11/2") |
Wall Thickness | 0.4–2.54 mm (0.016–0.1") |
Length | <15000 m (<50,000 ft) |
Standards | ASTM A269 / ASTM A249 |
Manufacturing Process | 10% Laser Welding, Cold Drawing, Bright Annealing |
Pressure Test | Conventional 5000 PSI / Max. 15000 PSI |
Inspection | Appearance, PMI, Size, Airtightness, ET, Hydro Pressure Test |
Certificates | ISO |
Packaging | Plastic Reel, Wooden Reel, Solid Wooden Reel, Iron Reel, Wooden Box |
Optional Service | Encapsulation, Customized Length, Third-party Inspection |
Company and Factory Introduction
MTSCO provides stainless steel and nickel alloy product solutions for global industrial piping projects, serving industries such as oil and gas, chemicals, marine, and heat exchange equipment. For control line products, MTSCO established its own factory, Siri Tubing, in 2024, specializing in the production of welded coiled tubing, geothermal coiled tubing, control line tubing, and multi-core cables, all of which are ISO-certified. Leveraging our in-house manufacturing capabilities, MTSCO ensures more consistent quality control, reliable delivery coordination, and robust project support. We do more than just sell products—we are your trusted supply chain partner.
Factory Advantages
1. Ultra-Long Continuous Manufacturing: Siri Tubing provides continuous coiled tubing up to 15,000 meters without butt welds (OD: 3.18-38.1mm, WT: 0.4-2.54mm). This eliminates on-site welding risks and reduces costs for deep-sea umbilicals and downhole cabling.
2. Extreme Pressure Resistance: All tubes undergo 100% high-pressure testing before shipment. With a standard test pressure of 40 MPa and a maximum of 100 MPa (far exceeding the 7 MPa standard for seamless pipes), we guarantee absolute safety for extreme high-pressure environments.
3. Rigorous Quality Control & Traceability: Raw materials are 100% sourced from top mills like POSCO, Baosteel, and TSINGSHAN, undergoing secondary PMI and MTC verification. The entire production process is supervised and fully documented. We also support strict third-party inspections (SGS, TÜV, BV).
4. In-House Independent Laboratory: Our in-house facility performs comprehensive testing, including RT, chemical analysis, intergranular corrosion, tensile, hardness, and metallographic tests. All reports and physical samples are retained to ensure 100% lifecycle traceability.
5. Ready Stock & Customization Services: To meet tight EPC project schedules, we maintain year-round stock of standard grades (304, 316, 2205, 2507, Alloy 625, Alloy 825). We also offer customized polymer encapsulation and highly secure packaging solutions, such as iron reels and solid wood spools.
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Material Properties Of TP316 Austenitic Steel
316L and 316Ti stainless steels are commonly used for transporting corrosive media and in instrumentation control systems. 316L has a low carbon content, resulting in a lower risk of intergranular corrosion after welding; 316Ti, stabilized with titanium, exhibits more stable microstructural behavior under certain high-temperature conditions. For geothermal coiled tubing, both materials are suitable for fluid control applications requiring dimensional accuracy, corrosion resistance, and continuous supply. MTSCO can match the appropriate material for you based on medium conditions, pressure requirements, and project standards, thereby reducing subsequent risks caused by material selection errors.
Eddy Current Testing (ET)
MTSCO’s technical team uses an automated eddy current testing system to perform 100% full-length scans on every coil of tubing. This equipment can detect minute cracks, gaps, and wall thickness anomalies on the surface or near-surface of continuous tubing in real time without making physical contact with the tubing. MTSCO insists on performing 100% full-length coverage eddy current testing on every coil of geothermal coiled tubing, spanning several kilometers in length, to ensure that automated equipment can accurately identify and locate any potential physical defects. This testing method mitigates potential risks for global engineering projects, thereby providing remote procurement clients with assured safety guarantees.
FAQ
Q1: What are the main materials used for MTSCO coiled tubing?
We offer a comprehensive range of stainless steel, duplex steel, and nickel alloy coiled tubing, including grades 304, 316, 2205, 2507, Alloy 625, and Alloy 825. All raw materials are sourced from internationally renowned steel mills, and each batch undergoes PMI material verification to ensure compliance with international standards such as ASTM and EN.
Q2: What is the maximum length per coil for this multi-core control cable?
A2: Our welded coils can reach a maximum length of 50,000 feet (approximately 15 kilometers) per coil, meeting the demands of long-distance downhole cabling, reducing on-site splices, and enhancing system reliability. MTSCO’s manufacturing facilities are equipped with the capability for ultra-long continuous production.
Q3: What is the maximum operating pressure of the coiled tubing?
A3:Our welded coiled tubing undergoes standard hydraulic testing at 5,000 PSI and can withstand a maximum test pressure of 15,000 PSI, meeting the requirements of the vast majority of high-pressure applications.
