PVDF Encapsulated Alloy 625 Muti Core Tubing Bright Annealed ASTM B704

PVDF EncapsulatedAlloy 625 Muti Core Tubing Bright Annealed ASTM B704

Company & Factory Introduction

MTSCO is a professional factory complex in the industrial piping sector, operating four major product divisions. In 2024, MTSCO established its own production base—Siri Tubing—specializing in the manufacturing of welded coiled tubing, control line flatpack, encapsulated control line, multi-core tubing, and cables. The factory strictly follows international ASTM standards and can supply various materials including 304, 316, 2205, 2507, Alloy 625, and Alloy 825. Siri Tubing has obtained ISO certification and has long-term partnerships with international energy companies such as OXY, KOC, and ADNOC. We are not just selling products, we are also your reliable supply chain partner.

Manufacturing Process Flow

The production of multi core tubing begins with steel strip. First, incoming inspection of the raw steel strip is conducted to confirm the material is correct; then strip butt welding is performed. The welded strip is cleaned first, then formed into a tube shape, and the tube body is formed through laser welding. Next, the product undergoes sizing, cold drawing, and in-line bright annealing processes. The formed welded coiled tubing also requires in-line eddy current testing as well as hydraulic or air tight testing to verify weld integrity and pressure sealing performance. Finally, the product undergoes fine coiling, marking, final inspection, plastic encapsulation, packaging, and warehousing, with shipment arranged according to customer requirements.

Specifications

Quality Control System

·Raw Material Re-inspection: All raw materials come from qualified suppliers such as POSCO, ATI, JISCO and other internationally renowned steel mills. Upon arrival, the QC team performs PMI composition re-inspection to ensure the material meets order requirements.

·Traceable production process: The main production processes include 100% laser welding, cold drawing, and bright annealing. Each production stage is supervised on-site by experienced technicians. The entire production process uses process cards, supporting full-process traceability.

·Pre-shipment full inspection: Siri Tubing has a professional QC team that conducts a series of inspections and tests on finished products, including routine appearance inspection, PMI test, dimension inspection, and more. At the same time, special inspections such as air tight test, hydraulic test, and eddy current testing are conducted.

Siri Laboratory Introduction

Siri Laboratory is equipped with tensile testing machines, impact testing machines, metallographic microscopes, hardness testers, and other equipment, capable of conducting various mechanical property tests including tensile testing, flaring testing, flattening testing, bending testing, and hardness testing. At the same time, the laboratory conducts professional testing such as chemical composition analysis, intergranular corrosion testing, and metallographic analysis. The laboratory's comprehensive testing system provides reliable quality assurance for Siri Tubing products.

Application Areas

MTSCO multi core tubing is widely used in applications where control, monitoring, and fluid transmission need to be integrated into one system.

In the oil & gas industry, it supports downhole control, chemical injection, and real-time monitoring, making it ideal for smart well completions and long-term operations. In subsea systems, it is used for umbilical and remote control applications, reducing connection points and improving reliability in deepwater environments.

In geothermal and energy projects, it performs under high temperature and high-pressure conditions, while in chemical processing and industrial systems, it enables precise fluid delivery and instrumentation connections. It is also suitable for marine and shipbuilding applications, where durability under dynamic conditions is critical.

With multiple encapsulation options available, it ensures stable performance across diverse and demanding environments.

Alloy 625 (UNS N06625)

Alloy 625 is a nickel alloy. Its primary strengthening elements are molybdenum and niobium. This material possesses exceptional high-temperature strength and oxidation resistance. Alloy 625 also offers excellent corrosion resistance, including resistance to pitting, crevice corrosion, and seawater corrosion. It is suitable for applications in aircraft engines, gas turbines, rocket engines, offshore platforms, diving equipment, the nuclear industry, chemical reactors, and high-temperature, high-pressure valv

FAQ

Q1: What is the maximum length of multi core tubing?

A1: Our multi core tubing can reach a maximum length of 50,000 feet (approximately 15 km) per coil. Ultra-long continuous production reduces the number of field splices.

Q2: What quality certifications does the product have?

A2: Siri Tubing has obtained ISO 9001 quality management system certification. All raw materials come from renowned steel mills; the production process is fully traceable; finished products undergo 100% eddy current inspection before shipment.

Q3: What typical working conditions are the products suitable for?

A3: Suitable for high-pressure, high-temperature, and corrosive environments, such as oil & gas downhole systems, subsea applications, geothermal projects, and chemical processing systems, where reliable control, monitoring, and fluid transmission are required.