Safety pressure barrier of Baoji Dingding titanium | titanium alloy pressure chamber in extreme environment

In extreme scenarios such as deep-sea exploration, aerospace, and oil exploration, the pressure chamber is "a safe fortress for life and equipment", and three core goals of "no leakage under high pressure, corrosion resistance and fatigue resistance, long-term protection, and lightweight and suitable working conditions" need to be achieved at the same time. The traditional steel and aluminum alloy pressure tanks have the pain points of heavy weight, poor corrosion resistance and low pressure limit, while the TC4, TC11 and TC18 titanium alloy pressure tanks developed by Baoji Dingding titanium, relying on the material advantages and precision forming technology of "China Titanium Valley", strictly comply with the standards of gb/t 23724 and ASTM b348, and through the "integral forging+seamless forming" process, realize the pressure bearing strength ≥ 200MPa, deep-sea watertightness ≤ 1 × 10 ⁻ PA · m ³/s, and perfectly meet the stringent requirements of 10000 meters deep-sea detector, high-altitude cabin and underground testing equipment.

1、 Core performance advantage: safety standard for titanium alloy reconstructed pressure chamber

According to the differential requirements of different extreme environments for pressure chamber "pressure bearing, corrosion resistance and weight", TC4, TC11 and TC18 form a complementary performance system, achieving a qualitative breakthrough compared with traditional materials:

TC4 (balanced pressure bearing type)

Ti-6Al-4V composition, tensile strength ≥ 960mpa, bearing limit 100-200mpa; The density is only 4.51g/cm ³, which is 45% less than the steel pressure tank, and is suitable for 3000m deep sea, middle and high altitude and other conventional extreme scenes.

TC11 (high temperature and high pressure type)

With the addition of ti-6.5al-3.5mo, the temperature resistance reaches 500 ℃, and the bearing strength at 450 ℃ remains ≥ 850mpa; High temperature creep rate ≤ 0.001%/1000h, which is the exclusive choice for ultra deep wells and high temperature environment.

TC18 (special type with excellent corrosion resistance)

The composition of ti-4.4al-4mo-2sn was optimized, the sulfur resistance grade was SSC C110, and the partial pressure of H ɑ s was 0.5MPa without stress corrosion; The 5000 hour salt spray corrosion rate is ≤ 0.00008mm/year, which is suitable for strong corrosion scenarios such as high sulfur gas fields and 10000 meters deep sea.

Common advantages

The whole seamless forming has no hidden danger of weld, and the fatigue life is ≥ 10 ⁵ cycles; The density of the surface oxide film is 99.9%, which can resist the corrosion of seawater, acid and alkali, and high-temperature gas, and the leakage rate is close to zero.

2、 Precise specification system: match the pressure demand of the whole scene

Combined with the application scenarios (depth/height/temperature), bearing pressure and installation dimensions of the pressure chamber, standardized and customized solutions are provided, covering the full range of 0.01-100m ³ of volume:

Customized service: it supports the processing of special-shaped pressure tanks (spherical, cylindrical and polyhedral) according to the 3D drawings of the equipment. TC11 can be stabilized at high temperature, and TC18 provides nitriding strengthened coating; Reserve sensor interface, cable hole position and sealing valve group to realize "ready to install and use"; Urgent orders will be completed within 15 days and delivered in batches within 45 days to meet the needs of scientific research and engineering repair.

3、 Core application scenario: security guard in extreme environments

1. deep sea exploration: life support for pressure resistance and corrosion resistance

In the deep-sea high-pressure and high corrosion environment, the titanium alloy pressure chamber provides a safety barrier for equipment and personnel:

-The TC18 enhanced pressure chamber is used for the 10000 meter manned submersible, with a φ 2000mm specification, a wall thickness of 80mm, and a pressure bearing capacity of 200MPa. It works continuously at 11000m deep sea for 72 hours without leakage, reducing the weight by 20% compared with the traditional titanium alloy process chamber, and improving the endurance capacity of the submersible;

-TC4 pressure chamber is equipped with a 5000m deep-sea robot, with a volume of 5m ³ and a water tightness of ≤ 1 × 10 ⁻ PA · m ³/s, which protects the internal detection instruments from seawater erosion, and the success rate of data transmission has increased from 92% to 99.8%.

2. oil exploration field: high temperature sulfur resistance test guarantee

Ultra deep well and high sulfur gas field testing requires the pressure chamber to withstand extreme working conditions, and titanium alloy components are accurately adapted:

-TC11 pressure chamber is used for testing 8000m ultra deep wells in Xinjiang. The pressure bearing capacity is 120MPa at 450 ℃ and the data of internal test instruments is stable after 1000 hours of continuous operation. Compared with the high-temperature alloy chamber, the weight is reduced by 50% and the load of downhole equipment is reduced;

-TC18 pressure chamber is used in Sichuan high sulfur gas field. It has no stress corrosion under the environment of 0.5MPa partial pressure of H ɑ s, and its service life is 8 times longer than that of stainless steel chamber. The maintenance cycle of test chamber is extended from 1 month to 6 months, reducing the exploration cost.

3. Aerospace: lightweight vacuum pressure

The high altitude and vacuum environment have extremely high requirements for lightweight and sealing of the pressure chamber, and the titanium alloy achieves high-efficiency adaptation:

-TC4 pressure chamber is used for high-altitude exploration satellite, with a volume of 0.5m ³, a weight of only 30kg, a vacuum degree of ≤ 1 × 10 ⁻ PA, and no deformation in the temperature cycle of -50 ℃~300 ℃. It protects the stable operation of satellite communication components and prolongs the service life of the aluminum alloy cabin by 3 times;

-TC4 aviation oxygen supply pressure cabin, φ 500mm specification, wall thickness of 8mm, pressure bearing capacity of 50MPa, weight reduced by 45% compared with steel, is convenient for installation in aircraft cabin and improves aircraft load efficiency.

4、 Whole process quality assurance: safety endorsement in extreme scenarios

1. traceability control of raw materials: adopt ≥ 99.8% high-purity sponge titanium, strictly control the content of Al (4.4%-5.7%) and Mo (4%-5.5%) by TC18, and attach ICP-MS composition report and mine traceability to each batch of raw materials to ensure stable pressure bearing and corrosion resistance;

2. precision manufacturing process: adopt the process of "vacuum melting+integral forging+seamless forming" to eliminate the hidden danger of weld fatigue; Five axis milling center processing interface, dimensional tolerance ≤± 0.02mm; the sealing surface adopts laser cladding technology to improve the sealing reliability;

3. inspection and verification of the whole item: they all passed the hydrostatic test (1.5 times the rated pressure), air tightness test (helium mass spectrometry leak detection), corrosion resistance test (salt spray/acid-base immersion), high temperature creep test (TC11 exclusive), non-destructive testing (ut/mt/pt detection, no internal defects), and each pressure chamber is attached with a complete test report;

4. customized service guarantee: provide guidance for installation and commissioning of pressure chamber and assist in sealing performance calibration; Establish use files, regularly visit the operation status, provide maintenance suggestions, and repair free of charge within the warranty period.

Baoji Dingding titanium: the core supplier of titanium alloy pressure cabin

The company is located in Baoji high tech Zone, the "China Titanium Valley". It has been engaged in the research, development and production of titanium alloy pressure tanks for 12 years. It has 4 special production lines, with an annual production capacity of 500 units, and has passed the ISO9001 quality management system and API 610 petroleum equipment certification. The products serve leading enterprises such as the Deep Sea Institute of the Chinese Academy of Sciences, CNOOC and COMAC, and become the preferred partners of extreme environmental pressure chambers.

Technical core: integral seamless forming+extreme working condition adaptation

Complete qualification: ISO9001, GB 4806.11

Service advantages: 24-hour technical support+customized solutions

Scheme consultation: send pressure demand+scenario parameters to 530975155@qq.com , get the adaptation scheme and quotation for free