ANSI Standard Safety Valve,API Safety Valve

INTRODUCTION

Yuming American Standard Safety Valve is a special safety valve designed, manufactured and inspected in accordance with authoritative standards such as API (American Petroleum Institute) and ASME (American Society of Mechanical Engineers). Its core function is to automatically open and release pressure when the medium pressure in the pressure-bearing equipment (such as storage tanks, reactors, pipelines) exceeds the set value; it automatically closes after the pressure drops to a safe value. It is the "last safety barrier" to prevent overpressure explosion of equipment in chemical, petroleum, electric power, natural gas and other industries. Its design and performance directly determine the operational safety of the pressure-bearing system.
Design and Performance Standards:
API 520
API 521
ASME BPVC Section VIII
Inspection and Testing Standards:
API 527
API 526
Installation and Maintenance Standards:
API 528

DATA

Selection recommendations：

Class	Rated pressure（MPa，20℃）	Applicable device types	Typical materials
Class 150	1.93	Low-pressure storage tanks (such as civilian liquefied gas tanks), air conditioning systems	WCB carbon steel, A351 CF8 stainless steel
Class 300~600	5.17~10.34	Medium-pressure reactors (such as chemical synthesis reactors), steam pipelines	WC6 chrome-molybdenum steel, A182 F316
Class 900~2500	15.51~42.03	High-pressure hydrogenation reactor, natural gas long-distance pipeline	A182 F316L, Hastelloy C276

Application：
Petrochemical: Refining catalytic cracking unit "Regenerator Safety Valve" (Class 600, WC6 chrome-molybdenum steel, high-temperature resistance of 400°C, discharges high-pressure flue gas generated by catalyst regeneration); Ethylene plant "Cracker Safety Valve" (Class 900, Inconel alloy, high-temperature resistance of 800°C);
Natural Gas/LNG: LNG storage tank "Cryogenic Safety Valve" (Class 300, A351 CF8M stainless steel + low-temperature spring, -196°C, prevents LNG vaporization overpressure); Natural gas long-distance pipeline "Station Safety Valve" (Class 1500, pilot-operated, resists pipeline backpressure fluctuations);
Power: Thermal power plant "Boiler Drum Safety Valve" (Class 600, WC9 chrome-molybdenum steel, high-temperature resistance of 540°C, discharges boiler overpressure steam); Nuclear power plant "Coolant System Safety Valve" (Class 1500, A182 F316L, radiation-resistant);
Chemical: High-pressure polyethylene plant "Polymerization Reactor Safety Valve" (Class 2500, Hastelloy alloy, high pressure resistance 25MPa, to prevent runaway polymerization and overpressure).