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Valves for LNG & Cryogenic Service — Chengdu

Chengdu is the gateway to the Sichuan Basin — China's largest and most prolific natural gas producing region, operated by PetroChina Southwest Oil & Gas Field Company and CNOOC Sichuan; Sichuan's gas fields feed China's West-East Gas Pipeline system, requiring API 6D Class 600–1500 natural gas ball valves, fully welded body pipeline ball valves, and pneumatic actuated butterfly valves for compressor station and metering station service; Vajra Industrial Solutions supplies cryogenic-rated and gas-service ball valves for Sichuan Basin pipeline projects and Chengdu-area petrochemical and chemical plants, with complete API 6D, ASME B16.34, and CNPC Q/SY standard documentation.

Extended-bonnet ball, gate, and globe valves for LNG, liquid nitrogen, liquid oxygen, and other cryogenic service — low-temperature impact tested materials.

BS 6364 (Cryogenic valves)ASME B16.34 Annex FAPI 6DEN 13942ASTM A350 LF2 / LF3
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LNG & Cryogenic Service Valves — Available in Chengdu

Cryogenic Ball Valve (Extended Bonnet)

Class 150 / 300 / 600 / 900

Quarter-turn operation with extended bonnet to keep packing above cryogenic temperature; fire-safe in LNG service

Materials: A351 CF8M, A182 F316L, A350 LF2 (forged) — SS 316 stem and trim  ·  Standards: BS 6364, API 6D, ASME B16.34, API 607
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Cryogenic Gate Valve (Extended Bonnet)

Class 150 / 300 / 600

Full-bore, straight-through isolation for LNG storage vessel and pipeline isolation

Materials: A350 LF2 (forged), A351 CF3M (cast SS316L low carbon), A182 F316L  ·  Standards: BS 6364, ASME B16.34, API 600
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Cryogenic Globe Valve (Extended Bonnet)

Class 150 / 300 / 600

Flow control and throttling in LNG process and vent/flare systems

Materials: A350 LF2, A182 F316L, A351 CF3M  ·  Standards: BS 6364, ASME B16.34
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Cryogenic Check Valve

Class 150 / 300

Non-return service on LNG pump discharge and send-out systems

Materials: A350 LF2, A351 CF8M, F316L  ·  Standards: BS 6364, API 594, ASME B16.34
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LNG & Cryogenic Service Industry in Chengdu

Chengdu is the gateway to the Sichuan Basin — China's largest and most prolific natural gas producing region, operated by PetroChina Southwest Oil & Gas Field Company and CNOOC Sichuan; Sichuan's gas fields feed China's West-East Gas Pipeline system, requiring API 6D Class 600–1500 natural gas ball valves, fully welded body pipeline ball valves, and pneumatic actuated butterfly valves for compressor station and metering station service; Vajra Industrial Solutions supplies cryogenic-rated and gas-service ball valves for Sichuan Basin pipeline projects and Chengdu-area petrochemical and chemical plants, with complete API 6D, ASME B16.34, and CNPC Q/SY standard documentation.

Natural Gas & PipelinePetrochemicalElectronics & SemiconductorPower GenerationChemical Manufacturing

Critical Valve Requirements

Charpy V-notch impact testing at design temperature (−46°C to −196°C) per ASTM A370
Extended bonnet design to maintain stem packing above −20°C minimum
Cryogenic testing per BS 6364: gas bubble leak test at operating temperature
Materials: ASTM A350 LF2 (forged) or A351 CF8M/CF3M (cast) — not A216 WCB
Fire-safe design (API 607) for LNG and flammable cryogenic fluids
Full-bore design where pigging or slug control is required
Seat material rated for cryogenic temperature — PTFE (to −200°C) or PEEK

Why Chengdu's Natural Gas & Pipeline Sector Needs LNG & Cryogenic Service Valves

Chengdu is the gateway to the Sichuan Basin — China's largest and most prolific natural gas producing region, operated by PetroChina Southwest Oil & Gas Field Company and CNOOC Sichuan; Sichuan's gas fields feed China's West-East Gas Pipeline system, requiring API 6D Class 600–1500 natural gas ball valves, fully welded body pipeline ball valves, and pneumatic actuated butterfly valves for compressor station and metering station service; Vajra Industrial Solutions supplies cryogenic-rated and gas-service ball valves for Sichuan Basin pipeline projects and Chengdu-area petrochemical and chemical plants, with complete API 6D, ASME B16.34, and CNPC Q/SY standard documentation. Key facilities in the Chengdu area — including PetroChina Southwest Oil & Gas Field Sichuan, CNOOC Sichuan natural gas operations, Chengdu Hi-Tech Industrial Development Zone — rely on Cryogenic Ball Valve (Extended Bonnet) for their natural gas & pipeline operations. Vajra Industrial Solutions supplies Cryogenic Ball Valve (Extended Bonnet), Cryogenic Gate Valve (Extended Bonnet), Cryogenic Globe Valve (Extended Bonnet), Cryogenic Check Valve for lng & cryogenic service projects across Sichuan, with full BS 6364 (Cryogenic valves) and ASME B16.34 Annex F 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 Chengdu

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

Also serving: PetroChina Southwest Oil & Gas Field Sichuan, CNOOC Sichuan natural gas operations, Chengdu Hi-Tech Industrial Development Zone, Sichuan Basin Gas Grid (CNPC Southwest Pipeline), Sichuan Chemical Industrial Park (Luzhou)

FAQ — LNG & Cryogenic Service Valves in Chengdu

Do you supply lng & cryogenic service valves in Chengdu?
Yes. Vajra Industrial Solutions supplies Cryogenic Ball Valve (Extended Bonnet), Cryogenic Gate Valve (Extended Bonnet), Cryogenic Globe Valve (Extended Bonnet), Cryogenic Check Valve for lng & cryogenic service applications in Chengdu, Sichuan. Chengdu is the gateway to the Sichuan Basin — China's largest and most prolific natural gas producing region, operated by PetroChina Southwest Oil & Gas Field Company and CNOOC Sichuan; Sichuan's gas fields feed China's West-East Gas Pipeline system, requiring API 6D Class 600–1500 natural gas ball valves, fully welded body pipeline ball valves, and pneumatic actuated butterfly valves for compressor station and metering station service; Vajra Industrial Solutions supplies cryogenic-rated and gas-service ball valves for Sichuan Basin pipeline projects and Chengdu-area petrochemical and chemical plants, with complete API 6D, ASME B16.34, and CNPC Q/SY standard documentation. We offer export documentation and delivery to Chengdu in 7–14 business days with full documentation and third-party inspection.
What certifications are required for lng & cryogenic service valves in Chengdu?
For lng & cryogenic service in Chengdu, the applicable standards are: BS 6364 (Cryogenic valves), ASME B16.34 Annex F, API 6D, EN 13942, ASTM A350 LF2 / LF3, ASTM A182 F316L, MSS SP-134. 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 lng & cryogenic service valves to Chengdu?
Standard stock sizes: export documentation and delivery to Chengdu 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 an extended bonnet on a cryogenic valve?
An extended bonnet (also called a top-entry or long-bonnet valve) has an elongated bonnet section that moves the stem packing away from the extremely cold process fluid. This prevents the packing material from being exposed to cryogenic temperature (where it would lose elasticity and leak), and prevents atmospheric moisture from freezing around the packing gland. The extension length is calculated based on the process temperature and the acceptable minimum packing temperature.
What ASTM material is used for cryogenic valves?
For LNG (−162°C) and liquid nitrogen (−196°C): ASTM A351 CF8M or CF3M (cast SS 316/316L) and ASTM A182 F316L (forged). For liquid CO₂ and −46°C service: ASTM A350 LF2 (forged low-temperature carbon steel), Charpy impact tested at −46°C. Standard A216 WCB carbon steel must never be used in cryogenic service below −29°C.

Other Application Guides for Chengdu

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LNG & Cryogenic Service Valves — Chengdu

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Standards

BS 6364 (Cryogenic valves)
ASME B16.34 Annex F
API 6D
EN 13942
ASTM A350 LF2 / LF3
ASTM A182 F316L
MSS SP-134

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