Alloy 625 Welded Capillary Tube Iron Reel Packing For Petrochemical

Alloy 625 Welded Capillary Tube Iron Reel Packing For Petrochemical

Company 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, capillary 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. 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.

3. 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.

4. Trusted by Global Energy Giants: As MTSCO’s manufacturing base, Siri Tubing is a stable supplier for top companies like OXY, KOC, and ADNOC. Driven by our S.I.R.I. philosophy (Safety, Ingenuity, Refinement, Innovation), our products have reliably served the oil & gas, geothermal, and shipbuilding sectors for over a decade.

Manufacturing Process Flow

The core manufacturing process for these welded capillary tubes typically includes strip welding, cold drawing, bright annealing, eddy current testing, and hydrostatic/air pressure testing, followed by precision coiling, marking, and final inspection as per project requirements. For small-diameter control line products, process stability directly impacts weld quality, dimensional consistency, and subsequent installation performance. MTSCO’s in-house facility, Siri Tubing, employs mature processes such as 100% laser welding, cold drawing, bright annealing, and plastic wrapping, making it suitable for the production of continuous-length control lines.

Specifications of N06625 Welded Capillary Tube

Quality Control System

·Raw Material Re-inspection: Raw materials are sourced from suppliers such as POSCO, TSINGSHAN, and Baosteel. Each batch must be accompanied by an MTC and PMI. Upon arrival at the factory, materials undergo re-inspection to confirm that the material properties meet order specifications. MTSCO employs secondary verification to minimize the risk of material errors and mix-ups.

·Process Traceability: Every stage—from welding, cold drawing, and annealing to packaging—is supervised by the QC team, with records maintained through production process sheets and photographic documentation.

·Pre-shipment 100% Inspection: Prior to shipment, inspections are conducted for appearance, dimensions, quantity, PMI, airtightness, ET, and hydrostatic pressure tests. We also support third-party inspections by SGS, TÜV, and BV. MTSCO provides comprehensive quality assurance documentation for high-standard projects.

Applications

Alloy 625 Welded Capillary Tubes, with their exceptional resistance to stress corrosion cracking and extremely high mechanical strength, are widely used in the following demanding operating environments:

· Oil and Gas Extraction: Welded capillary tube is widely used in downhole control systems (such as safety valve control lines) and chemical injection systems (such as scale inhibitors and corrosion inhibitors) in onshore and offshore oil and gas fields. Alloy 625 maintains exceptional structural stability and corrosion resistance in acidic downhole environments rich in hydrogen sulfide (H₂S) and carbon dioxide (CO₂).

· Petrochemical & Chemical Processing: Welded capillary tubes are extensively used in refineries and chemical plants for instrumentation pressure-transmitting lines, high-temperature fluid steam tracing lines, and transmission networks for highly corrosive chemical media. This tubing can withstand long-term exposure to localized corrosion and pitting caused by strong acids, strong alkalis, and chlorides.

· Marine Engineering & Shipbuilding: Welded capillary tubes serve primarily as the core control lines in subsea umbilicals, connecting surface platforms to subsea production systems. The 625 alloy’s superior resistance to seawater corrosion and marine salt fog ensures absolute reliability in the transmission of hydraulic power and chemical agents under deep-sea high-pressure conditions.

· Geothermal Energy: Welded capillary tubes are suitable for monitoring and controlling high-temperature, high-pressure fluids in geothermal wells. In geothermal extraction, the tubing is exposed to high-temperature formation water and dissolved highly corrosive minerals; the 625 alloy’s resistance to high-temperature oxidation makes it an ideal choice for geothermal capillary lines.

FAQ

Q1: How is the weld seam quality guaranteed for continuous lengths?

A1: We utilize advanced automated welding techniques followed by continuous bright annealing. 100% Eddy Current Testing (ECT) and strict hydrostatic testing are performed to ensure the weld seam integrity precisely matches the base material.

Q2: What is the maximum continuous length available for this welded capillary tube?

A2: Our control line products are available in long-length coils, up to 15,000 meters or 50,000 feet. Continuous lengths help reduce on-site splicing and improve installation efficiency. MTSCO’s in-house manufacturing facilities can accommodate long-length delivery requirements.

Q3: What are the main advantages of Iron Reel packing for this capillary tube?

A3: Iron reels provide superior structural support for heavy and long continuous tubing. It prevents crushing during international ocean transit.