Safety Valve Applications by Industry, Equipment, Service Condition and Medium

A safety valve application is defined by the protected equipment, credible overpressure scenario and installed relief system—not by industry name alone. Use this hub to move from the process context to the data required for sizing, valve-type selection, materials, back-pressure review, installation and project documents.

The linked pages use the current ZOBAI application URL structure, helping engineers and buyers reach the correct technical page without obsolete or duplicated slugs.

Browse by Engineering Context

Start with the protected equipment and credible relief scenario.
Confirm the medium phase, required relieving rate, pressure and temperature.
Include inlet pressure loss, outlet back pressure and discharge destination.
Match the final valve to certified capacity, materials, connection and project documentation.

››› Application Overview

Application pages should lead to an engineering decision, not only an industry description

Two valves installed in the same plant may require completely different designs because they protect different equipment or relief cases. A compressor discharge valve, reactor emergency PSV, blocked-in liquid thermal relief valve and storage-tank vacuum device should not be selected from one generic industry rule.

Each application page should identify the protected boundary, credible overpressure or vacuum cause, required capacity, medium behavior, temperature, back pressure, materials, installation constraints and documents needed before RFQ.

Engineering limitation

These pages support application screening and RFQ preparation. Final sizing and selection must follow the applicable code, project specification, relief-system calculation and manufacturer-certified valve data.

››› By Industry

Safety valve applications by industry

Industry pages connect common process equipment and risk patterns with the engineering data required for pressure-relief selection.

石油与天然气

Pressure relief for upstream, gas processing, pipelines, refinery units, LNG and LPG systems.

石油化工

PSV and PRV review for reactors, columns, compressors, exchangers, storage and polymer units.

化工处理

Selection for corrosive, toxic, reactive and fouling chemical duties across vessels and process lines.

工业气体

Protection for compressed, cryogenic and technical gas production, storage and distribution systems.

LNG与LPG

Cryogenic and liquefied-gas pressure relief for tanks, skids, transfer lines and vapor systems.

食品与饮料

Sanitary pressure protection for process vessels, CIP/SIP utilities, steam and gas systems.

制药

GMP-oriented relief for clean utilities, sanitary vessels, clean steam and controlled production systems.

船舶与海洋工程

Safety valves for shipboard steam, gas, fuel, refrigeration and auxiliary pressure systems.

››› By Equipment & System

Safety valve applications by protected equipment and system

Equipment-based pages begin with the pressure boundary, credible failure case and the inlet and outlet system surrounding the valve.

压力容器

Relief protection for receivers, separators, autoclaves, coded vessels and process containers.

锅炉与蒸汽

Boiler, steam drum, header, superheater and utility steam pressure protection.

压缩机

Relief for compressor discharge, receivers, interstage vessels, gas skids and refrigeration packages.

反应釜

Relief review for runaway reaction, blocked vent, fire, gas generation and two-phase flow.

储罐

Pressure and vacuum protection for atmospheric, low-pressure and pressurized storage systems.

管道

Relief for blocked outlet, pump deadhead, regulator failure, thermal expansion and gas-line overpressure.

换热器

Tube rupture, blocked-in liquid, thermal expansion and hot-side or cold-side relief review.

撬装系统

Integrated relief selection for modular process, compressor, LNG/LPG and gas-treatment packages.

››› By Operating Condition

Safety valve applications by operating condition

Special conditions can change valve design, certified capacity, materials, seat construction, back-pressure capability and maintenance requirements.

高背压

Valve-type and capacity review for flare headers, closed vents, scrubbers and return systems.

高压

Pressure class, tightness, materials and certified capacity for high-pressure gas and liquid systems.

高温

Steam, hot gas, thermal oil and elevated-temperature process relief.

真空工况

Vacuum breakers and pressure/vacuum relief for tanks, vessels, condensers and process systems.

腐蚀性工况

Material, lining, bellows and discharge review for acids, alkalis, sour gas, chlorides and solvents.

频繁循环

Selection for repeated relief, unstable pressure, compressor pulsation and cyclic equipment operation.

大排量

High-flow relief, large orifice, certified capacity and discharge-system review.

››› By Medium

Safety valve applications by process medium

The medium and phase influence sizing equations, materials, seat tightness, cleanliness, discharge safety and test documentation.

水

Liquid relief for pumps, pipelines, hot-water systems, accumulators and thermal expansion cases.

蒸汽

Safety valves for boilers, steam headers, process steam, superheated steam and thermal systems.

LNG

Cryogenic relief for LNG tanks, skids, vaporizers, transfer lines and blocked-in sections.

LPG

Relief for propane and butane storage, transfer, vaporization and process systems.

天然气

Pressure relief for gas pipelines, stations, separators, compressors and storage systems.

NH3

氨气

Material and discharge review for refrigeration and process ammonia service.

氢气

High-pressure, leakage, material and safe-venting review for hydrogen systems.

氧气

Oxygen compatibility, cleaning, ignition-risk and material review for O2 and LOX service.

››› Selection Data

Information required to move from an application page to a valve RFQ

The category identifies the context, but the valve cannot be selected until the actual relief and installation data are known. Send available calculations, datasheets, P&IDs, drawings or the existing valve nameplate.

Recommended engineering input

Protected equipment and credible relief or vacuum scenario
Medium composition, phase and relieving condition
MAWP or design pressure, set pressure and allowable overpressure
Operating, design and relieving temperature
Required relieving or inbreathing capacity
Minimum, normal and maximum back pressure
Inlet piping and outlet discharge arrangement
Valve size, connection standard and pressure class
Body, trim, seat, spring, bellows and gasket requirements
Applicable code, client specification and document list

››› Application Review Matrix

How the application context changes the safety valve specification

Use the application category to identify the questions that must be resolved before sizing, selection and quotation.

Industry & Regulatory Context

Defines common client specifications, inspection expectations, hazardous-service requirements and documentation practices.

Protected Equipment

Defines MAWP, nozzle arrangement, credible overpressure causes and installation limits.

Operating Condition

Can require balanced bellows, pilot operation, special seats, alloys or capacity correction.

Medium & Phase

Controls sizing basis, material compatibility, tightness, cleaning and discharge hazards.

安全阀选型指南

Step-by-step review of relief scenario, capacity, valve type, materials and installation.

Sizing & Certified Capacity

Connect required relieving load, calculated area, selected orifice and certified capacity.

背压与波纹管

Review superimposed and built-up back pressure and valve-type selection.

安装指南

Review inlet loss, outlet piping, reaction force, drainage and commissioning.

PROJECT REVIEW EVIDENCE

Real Production Evidence for Application Review

For Safety Valve Applications by Industry & Service | ZOBAI service, supplier review should connect valve construction to set pressure, medium, temperature, capacity, back pressure and the governing code. This actual ZOBAI photograph documents mixed safety valve production batch in the assembly area. Review it with drawings, material records and pressure-test documents.

Safety Valve Standards

Review API, ASME, ISO, DIN/EN and pressure-temperature reference pages.

PDF Downloads

Access current catalogs, datasheets and technical reference documents.

咨询工程师

Submit working conditions, datasheets or drawings for technical review.

Contact ZOBAI

Send RFQ data, quantities, delivery destination and document requirements.

››› FAQ

Common questions about safety valve applications

如何选择正确的应用页面？

从受保护设备及主要工程问题入手。行业页面用于说明行业背景，设备页面用于描述泄放工况，操作条件页面用于说明特殊设计约束，介质页面用于说明流体特定要求。.

同一台安全阀能否同时用于蒸汽、气体和液体介质？

并非自动如此。不同的流体相态可能需要不同的定径方法、排量认证、阀门动作、材料、测试及安装布置。.

何时应选用波纹管平衡式安全阀？

当叠加背压或积聚背压可能影响常规弹簧式安全阀时，或当将阀盖与出口流体隔离可带来使用优势时，应考虑采用波纹管平衡式设计。.

公称阀门尺寸是否足以用于报价？

No. Provide the relief scenario, required capacity, set pressure, fluid, temperature, back pressure, connections, materials, standards and required documents.

Can ZOBAI review an existing valve replacement?

Yes. Send the existing nameplate, datasheet, installation drawing and current operating conditions. The replacement should be checked against the present relief and discharge system.

Which documents help with application review?

Useful documents include the relief calculation, datasheet, P&ID, equipment drawing, piping layout, existing valve records, project specification and required inspection-document list.

Need help matching a pressure-relief valve to the actual application?

Send the protected equipment, relief scenario, medium, pressures, temperature, capacity, back pressure and project standard. ZOBAI can identify missing inputs and define the next sizing, selection or quotation step.