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Mailiao · Power Generation (Thermal, Gas, Hydro)

Valves for Power Generation (Thermal, Gas, Hydro) - Mailiao

Mailiao in Yunlin County hosts the Formosa Petrochemical (FPCC) Mailiao complex, one of the world's largest integrated petrochemical sites built around the Sixth Naphtha Cracker with a refinery, multiple olefins and aromatics trains, polymer plants, and captive cogeneration, served by a dedicated industrial port; naphtha-cracking, olefins, and polymer service drives demand for API 6D ball and gate valves in carbon and alloy steel for cracker, quench, and fractionation loops, cryogenic valves for ethylene and light-ends, low-fugitive-emission and bellows-seal valves for VOC service, high-temperature globe and check valves for furnace and steam systems, and API 526 relief valves; ASME B16.34, API standards, and international EPC specifications apply with full material certification and PMI; Vajra Industrial Solutions supplies Mailiao petrochemical operators and Taiwanese EPC contractors with cracker-grade, cryogenic, and low-emission valve packages with East Asia logistics.

Gate, globe, check, and safety valves for steam and condensate service in thermal power stations - ASME Class 600–2500, A217 WC9 and C12A (P91) materials, IBR certified.

ASME B16.34 (Class 600–2500)ASME Section I (Boiler valves)ASME Section VIII (Vessel PRV)API 526IBR (Indian Boiler Regulations)
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API 6D Certified
ASME B16.34
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Power Generation (Thermal, Gas, Hydro) Valves - Available in Mailiao

Gate Valve (High-Pressure Steam)

Class 600 / 900 / 1500 / 2500

Full-bore isolation on main steam, hot/cold reheat, and feedwater lines

Materials: A217 WC9 (2.25Cr-1Mo, up to 566°C), A217 C12A/P91 (9Cr-1Mo-V, up to 649°C)  ·  Standards: ASME B16.34, API 600, BS EN 13709 (formerly BS 1414)
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Globe Valve (Steam Isolation / Control)

Class 600 / 900 / 1500 / 2500

Throttling, main steam stop valves, and bypass line control in high-pressure steam systems

Materials: A217 WC9, A217 C12A (P91) for high-temperature main steam  ·  Standards: ASME B16.34, API 623, ASME B31.1
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Safety Relief Valve (IBR / ASME Sec. I)

Per rated pressure

Boiler drum and superheater outlet safety valves - mandatory IBR certification for Indian power plants

Materials: A216 WCB (LP steam), A217 WC9 (HP steam), SS 316 for corrosive steam  ·  Standards: ASME Section I, API 526, IBR Schedule IV
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Check Valve (BFW / Feedwater)

Class 300 / 600 / 900

Boiler feedwater non-return valves on boiler feed pump discharge

Materials: A216 WCB (lower pressure), A217 WC9 (Class 600+)  ·  Standards: ASME B16.34, API 6D / API 594
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Power Generation (Thermal, Gas, Hydro) Industry in Mailiao

Mailiao in Yunlin County hosts the Formosa Petrochemical (FPCC) Mailiao complex, one of the world's largest integrated petrochemical sites built around the Sixth Naphtha Cracker with a refinery, multiple olefins and aromatics trains, polymer plants, and captive cogeneration, served by a dedicated industrial port; naphtha-cracking, olefins, and polymer service drives demand for API 6D ball and gate valves in carbon and alloy steel for cracker, quench, and fractionation loops, cryogenic valves for ethylene and light-ends, low-fugitive-emission and bellows-seal valves for VOC service, high-temperature globe and check valves for furnace and steam systems, and API 526 relief valves; ASME B16.34, API standards, and international EPC specifications apply with full material certification and PMI; Vajra Industrial Solutions supplies Mailiao petrochemical operators and Taiwanese EPC contractors with cracker-grade, cryogenic, and low-emission valve packages with East Asia logistics.

Integrated PetrochemicalNaphtha CrackingOil RefiningPolymers & PlasticsCogeneration Power

Critical Valve Requirements

IBR certification mandatory for all boiler and steam line valves in India: Form III-C + Form III-E
ASME B16.34 Class 600–2500 pressure-temperature ratings for main steam service
High-temperature alloy steel: A217 WC9 (566°C max), C12A/P91 (649°C max)
PWHT (Post-Weld Heat Treatment) for all Cr-Mo and P91 welds
Stellite (Cobalt alloy) seat and disc facing for erosion and thermal cycling resistance
Full-penetration butt-weld ends (BW) with ASME B16.25 dimensions for power piping
Charpy V-notch impact testing for low-temperature startup conditions
Dimensional inspection per ASME B16.10 face-to-face dimensions

Why Mailiao's Integrated Petrochemical Sector Needs Power Generation (Thermal, Gas, Hydro) Valves

Mailiao in Yunlin County hosts the Formosa Petrochemical (FPCC) Mailiao complex, one of the world's largest integrated petrochemical sites built around the Sixth Naphtha Cracker with a refinery, multiple olefins and aromatics trains, polymer plants, and captive cogeneration, served by a dedicated industrial port; naphtha-cracking, olefins, and polymer service drives demand for API 6D ball and gate valves in carbon and alloy steel for cracker, quench, and fractionation loops, cryogenic valves for ethylene and light-ends, low-fugitive-emission and bellows-seal valves for VOC service, high-temperature globe and check valves for furnace and steam systems, and API 526 relief valves; ASME B16.34, API standards, and international EPC specifications apply with full material certification and PMI; Vajra Industrial Solutions supplies Mailiao petrochemical operators and Taiwanese EPC contractors with cracker-grade, cryogenic, and low-emission valve packages with East Asia logistics. Key facilities in the Mailiao area - including Formosa Plastics FPCC Mailiao complex, Mailiao industrial port, Sixth Naphtha Cracker (No.6 Naphtha) - rely on Gate Valve (High-Pressure Steam) for their oil refining operations. Vajra Industrial Solutions supplies Gate Valve (High-Pressure Steam), Globe Valve (Steam Isolation / Control), Safety Relief Valve (IBR / ASME Sec. I), Check Valve (BFW / Feedwater) for power generation (thermal, gas, hydro) projects across Yunlin, with full ASME B16.34 (Class 600–2500) and ASME Section I (Boiler valves) compliance documentation - EN 10204 3.1 material test certificates, API 598 pressure test reports, and third-party inspection co-ordination available for every order.

Delivery to Mailiao

Vajra Industrial Solutions offers export documentation and delivery to Mailiao in 7–14 business days. Emergency dispatch available for plant shutdowns and critical site requirements.

Also serving: Formosa Plastics FPCC Mailiao complex, Mailiao industrial port, Sixth Naphtha Cracker (No.6 Naphtha), Yunlin offshore corridor

FAQ - Power Generation (Thermal, Gas, Hydro) Valves in Mailiao

Do you supply power generation (thermal, gas, hydro) valves in Mailiao?
Yes. Vajra Industrial Solutions supplies Gate Valve (High-Pressure Steam), Globe Valve (Steam Isolation / Control), Safety Relief Valve (IBR / ASME Sec. I), Check Valve (BFW / Feedwater) for power generation (thermal, gas, hydro) applications in Mailiao, Yunlin. Mailiao in Yunlin County hosts the Formosa Petrochemical (FPCC) Mailiao complex, one of the world's largest integrated petrochemical sites built around the Sixth Naphtha Cracker with a refinery, multiple olefins and aromatics trains, polymer plants, and captive cogeneration, served by a dedicated industrial port; naphtha-cracking, olefins, and polymer service drives demand for API 6D ball and gate valves in carbon and alloy steel for cracker, quench, and fractionation loops, cryogenic valves for ethylene and light-ends, low-fugitive-emission and bellows-seal valves for VOC service, high-temperature globe and check valves for furnace and steam systems, and API 526 relief valves; ASME B16.34, API standards, and international EPC specifications apply with full material certification and PMI; Vajra Industrial Solutions supplies Mailiao petrochemical operators and Taiwanese EPC contractors with cracker-grade, cryogenic, and low-emission valve packages with East Asia logistics. We offer export documentation and delivery to Mailiao in 7–14 business days with full documentation and third-party inspection.
What certifications are required for power generation (thermal, gas, hydro) valves in Mailiao?
For power generation (thermal, gas, hydro) in Mailiao, the applicable standards are: ASME B16.34 (Class 600–2500), ASME Section I (Boiler valves), ASME Section VIII (Vessel PRV), API 526, IBR (Indian Boiler Regulations), IS 6392, ASTM A217 WC9 / C12A (P91), B31.1 Power Piping. All valves are supplied with full documentation including material test reports (EN 10204 3.1/3.2), pressure test certificates, and dimensional inspection reports. Third-party inspection (TPI) by EIL, Bureau Veritas, Lloyd's Register, or the client's nominated inspector can be arranged.
What is the delivery time for power generation (thermal, gas, hydro) valves to Mailiao?
Standard stock sizes: export documentation and delivery to Mailiao in 7–14 business days. Custom sizes and special materials (Duplex, Hastelloy, P91): 4–8 weeks manufacturing lead time. Express dispatch available for urgent site requirements. Contact us at +91-9979774557 or sales@vajravyuh.com with your specification and required delivery date.
What is IBR and which valves need IBR certification in Indian power plants?
IBR (Indian Boiler Regulations, 1950) is the regulatory framework for boilers and steam vessels under the Indian Boilers Act. All valves on steam lines with pressure above 3.5 kg/cm² (0.35 MPa) and temperature above 99°C require IBR certification. This includes: boiler drum safety valves, main steam stop valves, feed check valves, blowdown valves, and all steam isolation valves in the turbine hall. IBR documents required: Form III-C (chemical and mechanical test certificate for material) and Form III-E (hydrostatic test certificate for the finished valve).
What is the difference between A217 WC9 and P91 (C12A) for power plant valves?
A217 WC9 (2.25Cr-1Mo) is used for high-pressure steam valves up to 566°C (1050°F) and is standard for most subcritical (Main Steam temp ~538°C) and conventional supercritical power plants. ASTM A217 C12A is the cast equivalent of P91 (9Cr-1Mo-V) forged material and is used for ultra-supercritical (USC) plants where main steam temperatures reach 600–620°C. P91/C12A has superior creep strength but requires more stringent PWHT and welding controls.

Other Application Guides for Mailiao

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Power Generation (Thermal, Gas, Hydro) Valves - Mailiao

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Standards

ASME B16.34 (Class 600–2500)
ASME Section I (Boiler valves)
ASME Section VIII (Vessel PRV)
API 526
IBR (Indian Boiler Regulations)
IS 6392
ASTM A217 WC9 / C12A (P91)
B31.1 Power Piping

Product Categories

Gate Valves Globe Valves Check Valves Safety & Relief Valves

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