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Valves for Compressed Gas & CNG Systems — Ulsan

Ulsan is South Korea's industrial powerhouse — home to SK Innovation's Ulsan refinery (840,000 bpd, South Korea's largest), S-OIL's Onsan refinery (669,000 bpd), and Hyundai Heavy Industries' shipyard (world's largest single shipbuilding complex); the city's LNG receiving terminals require cryogenic-rated ball valves and butterfly valves per KGS (Korean Gas Safety) and API 6D standards; Vajra Industrial Solutions supplies API 6D ball valves, ASME B16.34 gate and globe valves, and fire-tested butterfly valves to Ulsan refineries and shipbuilding contractors — Korean customs HS code declarations, EN 10204 3.1 MTCs, and Korean Industrial Standards (KS) compliant documentation provided.

Class 2500 and Class 1500 CNG ball valves with PNGRB approval, IS 15901 compliant gate and ball valves for city gas distribution, and high-pressure compressed air/nitrogen valves for industrial CNG systems.

IS 15901 (CNG/CGD Valves)PNGRB RegulationsAPI 6DClass 2500 (ASME B16.34)API 607 (Fire-Safe)
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API 6D Certified
ASME B16.34
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Compressed Gas & CNG Systems Valves — Available in Ulsan

CNG Ball Valve (Class 2500)

Class 1500 / 2500 (PN 250 / PN 420)

CNG station dispenser isolation and cascade storage — 200–250 bar natural gas; fire-safe, anti-static, full-bore; PNGRB approved

Materials: A182 F316 or F316L forged body; SS316 ball; reinforced PTFE seats; stainless stem with anti-static spring  ·  Standards: IS 15901, API 6D, API 607, PNGRB Type Approval
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Gate Valve (City Gas Distribution)

Class 150 / 300 (ASME); PN 16 / PN 40 (EN)

Sectional valve on medium and low-pressure gas distribution mains — IS 15901 compliance; PNGRB authorization

Materials: A216 WCB with SS316 trim for medium pressure (4–19 bar); ductile iron with NBR seats for LP (<0.1 bar)  ·  Standards: IS 15901, API 600, PNGRB Regulations
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Safety Relief Valve (CNG)

Class 2500

CNG storage cascade and mother station overpressure protection — set pressure up to 250 bar

Materials: A351 CF8M SS316 with Stellite trim for high-cycle gas service  ·  Standards: API 526, API 527, IS 2825, PNGRB type approval
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Ball Valve (Industrial Compressed Air/N₂)

Class 150 / 300 / 600

Compressed air systems (7–14 bar) and nitrogen bottles/manifolds (150–200 bar) — economy grade for inert gas

Materials: A216 WCB with SS316 trim for utility air; A182 F316L for nitrogen and food-grade CO₂  ·  Standards: ASME B16.34, API 598
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Compressed Gas & CNG Systems Industry in Ulsan

Ulsan is South Korea's industrial powerhouse — home to SK Innovation's Ulsan refinery (840,000 bpd, South Korea's largest), S-OIL's Onsan refinery (669,000 bpd), and Hyundai Heavy Industries' shipyard (world's largest single shipbuilding complex); the city's LNG receiving terminals require cryogenic-rated ball valves and butterfly valves per KGS (Korean Gas Safety) and API 6D standards; Vajra Industrial Solutions supplies API 6D ball valves, ASME B16.34 gate and globe valves, and fire-tested butterfly valves to Ulsan refineries and shipbuilding contractors — Korean customs HS code declarations, EN 10204 3.1 MTCs, and Korean Industrial Standards (KS) compliant documentation provided.

Oil Refining (SK Innovation, S-OIL)Petrochemical ManufacturingShipbuilding & Offshore (Hyundai Heavy Industries)LNG Receiving TerminalsAutomotive Manufacturing (Hyundai Motor)

Critical Valve Requirements

PNGRB Type Approval — all valves used on City Gas Distribution networks in India require PNGRB approval; Vajra supplies PNGRB-approved CNG ball valves
IS 15901 compliance — Indian Standard for natural gas valves covering material, design, testing, and marking requirements specific to gas distribution
Fire-safe design per API 607 — mandatory for all CNG station valves in compressed gas service; metal seat backup prevents external fire leakage
Anti-static design — mandatory for natural gas service; conductive path between ball/stem and body to prevent electrostatic sparking
Fugitive emissions — ISO 15848-1 Class B or better for all valves on gas distribution mains; PNGRB requires zero-leak certification
Full-bore design for metering bypass and pigging — all trunk main isolation valves on CGD networks must be full-bore per PNGRB network code

Why Ulsan's Oil Refining (SK Innovation, S-OIL) Sector Needs Compressed Gas & CNG Systems Valves

Ulsan is South Korea's industrial powerhouse — home to SK Innovation's Ulsan refinery (840,000 bpd, South Korea's largest), S-OIL's Onsan refinery (669,000 bpd), and Hyundai Heavy Industries' shipyard (world's largest single shipbuilding complex); the city's LNG receiving terminals require cryogenic-rated ball valves and butterfly valves per KGS (Korean Gas Safety) and API 6D standards; Vajra Industrial Solutions supplies API 6D ball valves, ASME B16.34 gate and globe valves, and fire-tested butterfly valves to Ulsan refineries and shipbuilding contractors — Korean customs HS code declarations, EN 10204 3.1 MTCs, and Korean Industrial Standards (KS) compliant documentation provided. Key facilities in the Ulsan area — including SK Innovation Ulsan Refinery (840,000 bpd — South Korea's largest), S-OIL Onsan Refinery (669,000 bpd), Hyundai Heavy Industries Ulsan Shipyard (world's largest) — rely on CNG Ball Valve (Class 2500) for their oil refining (sk innovation, s-oil) operations. Vajra Industrial Solutions supplies CNG Ball Valve (Class 2500), Gate Valve (City Gas Distribution), Safety Relief Valve (CNG), Ball Valve (Industrial Compressed Air/N₂) for compressed gas & cng systems projects across Ulsan, with full IS 15901 (CNG/CGD Valves) and PNGRB Regulations 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 Ulsan

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

Also serving: SK Innovation Ulsan Refinery (840,000 bpd — South Korea's largest), S-OIL Onsan Refinery (669,000 bpd), Hyundai Heavy Industries Ulsan Shipyard (world's largest), Korea Gas Corporation (KOGAS) Tongyeong LNG terminal, Hyundai Motor Ulsan plant (1.5M cars/yr)

FAQ — Compressed Gas & CNG Systems Valves in Ulsan

Do you supply compressed gas & cng systems valves in Ulsan?
Yes. Vajra Industrial Solutions supplies CNG Ball Valve (Class 2500), Gate Valve (City Gas Distribution), Safety Relief Valve (CNG), Ball Valve (Industrial Compressed Air/N₂) for compressed gas & cng systems applications in Ulsan, Ulsan. Ulsan is South Korea's industrial powerhouse — home to SK Innovation's Ulsan refinery (840,000 bpd, South Korea's largest), S-OIL's Onsan refinery (669,000 bpd), and Hyundai Heavy Industries' shipyard (world's largest single shipbuilding complex); the city's LNG receiving terminals require cryogenic-rated ball valves and butterfly valves per KGS (Korean Gas Safety) and API 6D standards; Vajra Industrial Solutions supplies API 6D ball valves, ASME B16.34 gate and globe valves, and fire-tested butterfly valves to Ulsan refineries and shipbuilding contractors — Korean customs HS code declarations, EN 10204 3.1 MTCs, and Korean Industrial Standards (KS) compliant documentation provided. We offer export documentation and delivery to Ulsan in 7–14 business days with full documentation and third-party inspection.
What certifications are required for compressed gas & cng systems valves in Ulsan?
For compressed gas & cng systems in Ulsan, the applicable standards are: IS 15901 (CNG/CGD Valves), PNGRB Regulations, API 6D, Class 2500 (ASME B16.34), API 607 (Fire-Safe), API 6FA, ISO 15848-1 (Fugitive Emissions). 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 compressed gas & cng systems valves to Ulsan?
Standard stock sizes: export documentation and delivery to Ulsan 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 PNGRB approval and which CNG valves require it?
The Petroleum and Natural Gas Regulatory Board (PNGRB) under the Indian Ministry of Petroleum regulates city gas distribution (CGD) networks. All equipment used on PNGRB-licensed CGD networks must be PNGRB type-approved, which involves testing to IS 15901 (for valves) and other Indian standards, followed by PNGRB listing. This applies to isolation valves on steel gas mains, service isolation valves, and CNG station valves. Valves at industrial consumers not connected to the CGD network (e.g., CNG used for industrial gas cylinders) may use standard API 6D or API 607 compliant valves without specific PNGRB approval.
What pressure class do I need for CNG station ball valves?
CNG is stored and dispensed at 200–250 bar (approximately 3,000–3,600 psi). ASME Class 2500 (PN 420) has a working pressure of approximately 414 bar at ambient temperature for WCB material — making it the standard pressure class for CNG station isolation valves. For cascade storage working at exactly 250 bar, Class 2500 provides adequate design margin. Use forged A182 F316 or F316L body (not cast WCB) for Class 2500 CNG service — forged bodies have better toughness and are the industry standard for high-pressure gas service.

Other Application Guides for Ulsan

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Compressed Gas & CNG Systems Valves — Ulsan

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Standards

IS 15901 (CNG/CGD Valves)
PNGRB Regulations
API 6D
Class 2500 (ASME B16.34)
API 607 (Fire-Safe)
API 6FA
ISO 15848-1 (Fugitive Emissions)

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