ASTM A789 2205 Duplex Corrosion Resistant Instrumentation Tubing

ASTM A789 2205 Duplex Corrosion Resistant Instrumentation Tubing

Why Does Instrumentation Tubing Matter?

Instrumentation tubing consists of small-diameter, precision-engineered pipes used to connect pressure instruments, control valves, and industrial equipment. These tubes primarily serve functions such as pressure transmission, the transport of hydraulic media, and fluid sampling for instrumentation. Because such piping often requires on-site bending and connection via compression fittings, the material must meet stringent requirements regarding outer diameter tolerance, wall thickness uniformity, surface quality, and sealing reliability.

Specifications Of 2205 Instrumentation Tubing

Why Choose Siri Tubing?

Siri Tubing, a specialized manufacturing facility for tubing and control lines under the MTSCO brand, operates a 7,000-square-meter plant with a production capacity of 150 tons per month. Our product portfolio includes instrumentation tubing, coiled tubing, control lines, and TEC (tubing encapsulated conductors). The facility is equipped with a professional laboratory and a comprehensive quality inspection system, and it holds ISO quality management system certification. With extensive experience in supporting global projects, we offer a wide range of tubing products in various materials and specifications. Please submit your project requirements to receive a quotation.

What Tests Have Our Products Undergone?

Siri Tubing conducts rigorous testing on finished products and maintains detailed inspection records. Every batch is backed by clear quality documentation prior to delivery.

·Visual Inspection: Examines the surface and ends of the tubes to identify issues such as scratches, dents, oxidation, or other surface defects.

·Dimensional Inspection: Measures critical dimensions, including outer diameter, wall thickness, and length, against specified tolerances to prevent deviations that could affect subsequent connection and installation.

·Positive Material Identification (PMI): Verifies the material grade via spectral analysis, cross-referencing it with the Material Test Certificate (MTC) and heat number.

·Eddy Current Testing: Performs continuous inspection of the tube to detect surface and near-surface anomalies, while also verifying the integrity of the weld seam and the continuity of the tube body.

·Air / Hydraulic Pressure Testing: Assesses the structural integrity of the tube and checks for leaks. We are equipped to perform 100% air or hydraulic pressure testing at pressures ≥35 MPa.

Siri Laboratory

·Weld Radiographic Test Laboratory (RT)

·Chemical Composition Analysis Laboratory

·Intergranular Corrosion Test Laboratory

·Tensile Test Laboratory

·Hardness Test Laboratory

·Metallographic Laboratory

Equipped with professional instruments such as tensile testers, impact testers, metallographic microscopes, and hardness testers, the Siri Laboratory performs mechanical property and non-destructive testing, including tensile, flaring, flattening, bending, hardness, and radiographic testing. All test reports and samples are archived as required to facilitate order traceability, quality verification, and project acceptance.

Material Properties of 2205 Duplex Stainless Steel

2205 (UNS S31803/S32205) is a duplex stainless steel composed of both austenite and ferrite phases, characterized by high strength and excellent corrosion resistance. Compared to conventional austenitic stainless steels such as 304 or 316L, 2205 offers a higher yield strength and superior resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking.

In the context of instrumentation tubing, the high strength of 2205 enhances the pressure-bearing capacity of the piping system and provides greater flexibility in wall-thickness design. Its corrosion resistance makes it well-suited for applications in marine engineering, oil and gas platforms, as well as instrumentation and hydraulic control systems exposed to chloride-containing media—ultimately helping to reduce the risks of leaks caused by corrosion and the need for subsequent maintenance.

FAQ

Q1: How is instrumentation tubing packaged and transported?

A1: MTSCO uses plywood crates for packaging. Each tube is individually sleeved in a plastic bag, and protective end caps are fitted to both ends. This minimizes the risk of scratches, contamination, or damage to the tube ends during transit, ensuring the product arrives in good condition for customer inspection.

Q2: Do you accept third-party quality inspections?

A2: Yes, we fully support inspections by third-party agencies designated by the client, such as SGS, TÜV, or BV.

Q3: Is the production process traceable?

A3: Yes. Our production process involves dedicated equipment and technical personnel. Quality Control (QC) oversees every stage, and we maintain comprehensive records, including process cards and photographic documentation to ensure full traceability.