Explore our premium product portfolio equipped with 1-inch NPT connection interfaces, explosion-proof housings, and robust intelligence systems.
In hazardous industrial operations and municipal distribution grids, connection integrity is paramount. National Pipe Taper (NPT) stands as the primary technical specification for structural pipe fittings across North America and select international markets. A 1 Inch NPT fitting is engineered with a tapered thread design, where the outer diameter measures approximately 1.315 inches (33.4 mm) with 11.5 threads per inch. As the male and female NPT connections are screwed together, they compress to form a metal-to-metal seal, preventing hazardous combustible gas leaks.
Our OEM gas solenoid valves (such as the XF3III Series), wireless pressure monitors, and explosion-proof detection systems employ precision CNC-machined 1 Inch NPT ports. This interface is capable of handling heavy pipeline shear stresses, high internal flow volumes, and extreme atmospheric pressure shifts in critical environments like petrochemical complexes, metallurgical plants, and gas transport stations.
By prioritizing NPT standard compatibility, we empower engineering procurement teams to seamlessly integrate our explosion-proof sensing and shut-off apparatus with legacy piping systems, avoiding expensive custom adaptors and minimizing installation downtime.
Our threading process uses computer-controlled multi-axis lathes targeting a pitch diameter tolerance of less than ±0.003", ensuring hermetic sealing and high durability.
Every 1" NPT solenoid valve undergoes strict hydrostatic testing at 1.5 times the maximum rated operating pressure prior to leaving our CNAS certified test center.
Founded in 2003, Xinhaosi is one of the most influential and trusted brands in the global gas safety industry. Over the past two decades, we have steadily built a robust and comprehensive production and service system, which integrates cutting-edge R&D, intelligent manufacturing with advanced automation equipment, digital marketing across global channels, professional after-sales support with an experienced technician team, flexible OEM/ODM services, as well as CNAS-Accredited laboratory calibration services that meet international standards.
Our diversified product portfolio covers industrial & residential gas detection & alarm systems, industrial & household gas solenoid valves (featuring 1 Inch NPT and other global standard connection types), and urban gas pipeline network monitoring systems—all engineered to adapt to complex working environments and strict safety requirements. We produce and sell tens of millions of units annually, catering to a wide range of industries that demand reliable gas detection solutions, including oil & gas exploration and production, petrochemicals, urban gas distribution, automotive manufacturing, pharmaceuticals, new energy, steel production, and beverage processing.
Guided by the core mission of "Making Gas Safety Accessible Everywhere," we consistently deliver high-performance, reliable products and customized solutions tailored to each client's unique needs. Every item we manufacture undergoes rigorous quality control tests, and every service we provide is backed by our professional technical team, fully embodying our unwavering commitment to safeguarding gas safety across both industrial workplaces and residential environments, and striving to build a safer world with sustainable gas safety technologies.
Chengdu Factory & Office
Deyang Factory
Accredited laboratories, national standards development, and robust patent portfolios back our gas safety systems.
Adhering to ISO9001 quality management system standards, Xinhaosi's core products have obtained a full range of authoritative certifications, including national compulsory Products Certification, explosion-proof certification, fire product certification, CPA measurement instrument type approval certificate, and international approvals as CE, SIL. Additionally, Xinhaosi holds honors such as "National Quality Integrity Benchmark Enterprise" , "National Quality Leading Enterprise in the Gas Alarm Industry," member of the China Fire Protection Association, and the main drafting organization for the national standard of solenoid valves, further confirming its industry influence and reputation.
In the field of intellectual property, Xinhaosi has built a robust innovation system with over 50 patents and software copyrights . These patents cover core technological areas, including a graphical monitoring system for gas detection and alarm, which enables predictive maintenance based on historical data to reduce equipment failure rates by over 30%, and a solenoid valve with flow monitoring functionality that integrates flow detection and alarm capabilities . The company also pioneered China's first networked bus-type gas leakage monitoring system and the only maximum-point gas leakage monitoring system certified by the Ministry of Public Security, demonstrating its leading position in cutting-edge technological research.
Our in-house laboratory is accredited by the China National Accreditation Service for Conformity Assessment (CNAS), recognized both domestically and internationally under the ILAC-MRA framework. It operates in accordance with ISO/IEC 17025, the international standard for testing and calibration laboratories. It provides reliable and traceable testing services for gas detection and alarm products, solenoid valves, and related safety equipment. Test reports issued by the CNAS-accredited laboratory are widely accepted by regulatory authorities, certification bodies, and customers in China and overseas, helping to ensure product quality, safety compliance, and market access.
Ensuring that global industrial standards are met at every step of pipeline integration and detector installation.
We comply fully with ASME B1.20.1 standards, ensuring that every 1 Inch NPT male and female thread aligns perfectly with North American process connections, reducing mechanical misalignment and ensuring tight seal limits.
Our solenoid valves and detection devices are certified to IEC 61508 / EN 50402 (SIL-2/3), ensuring high probability of action on demand, critical for safety Instrumented Systems (SIS) in heavy processing industries.
Engineered for hazardous zones, our hardware supports explosion-proof certification standards (Class I, Division 1 & 2, ATEX Zone 1 & 2, and CNAS calibration verification) for complete local site sign-off.
Leveraging specialized infrastructure, optimized material logistics, and scale economies of our Sichuan-based manufacturing hubs.
Our state-of-the-art production plants in Chengdu and Deyang are equipped with advanced automated machining systems. With millions of units produced annually, we maintain a robust inventory of raw metals (brass, stainless steel, aluminum alloy) designed for 1 Inch NPT components. This raw material security protects our global clients from supply chain disruptions.
Our intelligent factories implement real-time SMT assembly, automated calibration chambers, and robotic leak testing machines. By digitizing our factory floors, we trace each sensor module and valve casing back to its production batch. This meets the material traceability requirements (EN 10204 3.1) of petrochemical and refinery operations worldwide.
Sichuan's mature industrial ecosystem provides access to high-grade sensor elements, precision castings, and electronics packaging, allowing us to offer cost-competitive OEM/ODM services without compromising on certified safety and engineering tolerances.
Precision CNC Machining: Zero-tolerance thread profile matching for all NPT connections.
Raw Material Standards: SUS304, SUS316L, and high-tensile brass options.
Production Output: Over 10 million units delivered annually.
Global Logistics: Fast access to major shipping ports, providing optimal freight paths to the Americas, Europe, and the Middle East.
Where high reliability, quick automatic shut-off, and explosion-proof containment are required.
Used in municipal pressure regulating stations and district boiler pipelines. Our 1" NPT valves provide fast emergency shut-off during low-pressure drops or seismic detection alerts, safeguarding residential and commercial gas networks.
In highly corrosive, gas-dense processing zones, our stainless steel 1" NPT gas monitors measure combustible and toxic concentrations. They interface with control networks using standard 4-20mA or RS485 Modbus connections.
Hydrogen gas risks require quick detection and automatic shutdown. Our flame detectors and fast-acting solenoid valves provide early detection and rapid isolating action to protect high-value infrastructure.
A history of innovation, growing from a local startup to a pioneer in intelligent gas safety technologies.
Start Up: Established on April 17, 2003. Launched our first-generation gas leakage alarm and fire protection products, establishing ourselves in the domestic safety market.
Initial Scale Achievement: Commenced production of gas safety valves and expanded our OEM/ODM division. Relocated to our corporate office building in the Longtan Industrial Park.
Rapid Growth: Reached sales of 10 million gas detectors. Relocated to the Chengdu factory complex, built out a nationwide sales and support network, and introduced fire power monitoring systems.
Leading Up: Launched our proprietary in-house IoT gas safety platform. Developed fire automatic alarm systems, emergency lighting, and evacuation networks. Certified as an official supplier to China's top five gas companies.
Steady Development: Commenced construction of the Deyang manufacturing facility. Established the specialized Petrochemical & International Business Divisions. Formally recognized as a Sichuan Provincial Technology Center.
Embrace the Future: Deyang factory completed and fully operational. Launched wireless gas detection lines, smart urban pipeline network monitors, and AI-enabled smart safety valves for predictive network shut-offs.
Expert answers addressing the selection, threading, material compliance, and deployment of 1" NPT gas safety fittings.
Complete your facility's safety architecture with our high-integrity controller panels and flame monitoring systems.
Whether you require customized explosion-proof housings, specific pressure ratings, or complex IoT software integrations, our engineering team is ready to design and manufacture your solution.
