Tangshan Hangao Special Equipment Inspection Co., Ltd.
Professional · Authoritative · Safe · Efficient
For more than twelve years, Hangao has focused on special equipment inspection and testing to support safe industrial operations.
Core Inspection Services
Providing standardized, reliable and traceable inspection services for gas cylinders, safety valves, cryogenic vessels, breathing apparatus and pressure gauges.
Our core service portfolio covers vehicle gas cylinders, CNG/LNG safety valve calibration by pressure range, industrial cryogenic vessel inspection, breathing apparatus testing, LPG cylinders, welded fire-fighting cylinders, seamless steel cylinders and pressure gauge verification.
Vehicle Gas Cylinders
Periodic inspection for vehicle CNG/LNG cylinders, including appearance, accessories and key safety checks.
Learn MoreCNG/LNG Safety Valve Calibration (<10MPa)
Offline and online calibration for safety valves below 10MPa to ensure accurate set pressure and sealing performance.
Learn MoreCNG/LNG Safety Valve Calibration (>=10MPa)
Specialized high-pressure calibration and verification service for demanding operating conditions.
Learn MoreIndustrial Cryogenic Vessels
Dedicated inspection for Dewar vessels with focus on structural integrity, insulation performance and safety accessories.
Learn MoreBreathing Apparatus Testing
Performance evaluation of breathing apparatus components and complete sets for industrial and emergency use.
Learn MoreLPG Cylinders
Standardized inspection for LPG cylinders to improve safety during filling, storage, transportation and use.
Learn MoreFire-Fighting Welded Cylinders
Inspection for fire-service welded cylinders with emphasis on pressure-bearing parts and accessory validity.
Learn MoreSeamless Steel Cylinders
Inspection service for seamless steel cylinders and propane cylinders, covering critical risk areas.
Learn MorePressure Gauge Verification
Verification service to keep pressure gauge measurements accurate, stable and traceable.
Learn MoreAbout Hangao
Tangshan Hangao Special Equipment Inspection Co., Ltd. is a specialized service provider with registered capital of RMB 5 million, focused on special equipment inspection and integrated testing services.
Current business scope covers gas cylinder inspection for composite breathing apparatus, oxygen breathing apparatus, insulated welded cylinders, seamless steel cylinders, vehicle CNG cylinders and LNG cylinders, as well as safety valve calibration for both high-pressure and low-pressure applications.
The company is preparing to further expand into boiler, pressure vessel, pressure piping, amusement facility, elevator, in-plant vehicle and lifting equipment inspection, serving sectors such as steel, chemical, coking, heating, public facilities and industrial construction.
Read MoreWhy Choose Hangao
Professional capability backed by compliance and execution
Authoritative Qualifications
Approved by the relevant regulatory authorities for special equipment inspection and testing services.
Experienced Team
More than 80 technical professionals, including senior engineers and qualified inspection personnel.
Advanced Equipment
Equipped with modern NDT instruments, laboratory devices and safety performance testing facilities.
Reliable Service
Responsive consultation, standardized reporting and professional support throughout the service cycle.
Looking for Special Equipment Inspection Services?
Our technical team is ready to support your inspection and compliance needs.