Why 92% of Engineers Specify Aohong Spiral Wound Gaskets

When Pipe Leaks Mean Disaster: Why 92% of Refineries Choose Aohong’s Spiral Wound Gaskets

After watching a “premium” gasket fail during a pressure test at Jurong Island refinery, I learned the hard way: spiral wound gaskets aren’t just components – they’re the last line of defense against catastrophic leaks in critical piping systems.

“That imported gasket without inner rings? Blew out at 1,200 psi. Now we won’t install anything without Aohong’s pressure-balancing channels.”

Chief Engineer, Singapore Refinery

⚙️ Anatomy of a Bulletproof Seal

Our spiral wound gaskets combine three critical elements:

Filler Materials

• CAF-3 graphite (standard workhorse)
• PTFE for acid baths
• Mica for 1000°F steam lines
• Ceramic fiber for furnace duty

Outer Rings

• Carbon steel (economy option)
• 304/316 stainless (corrosion fighter)
• Titanium alloys for sour service

Inner Rings

• Laser-etched guides – no more misalignment
• Pressure-balancing channels – stops uneven compression
• Thermal expansion slots – handles 800°F swings

🔥 The Jurong Island Wake-Up Call

That 2022 failure changed how we engineer gaskets:

▸ System: Sour gas line (45% H₂S)
▸ Pressure: 1,200 psi @ 300°F
▸ Failure: Blowout during pressure test
▸ Solution: Our NACE-compliant spiral wound gasket with titanium rings
▸ Result: Still sealing after 18 months of abuse

🏭 Industry-Proven Performance

Oil & Gas

• NACE MR0175 certified for sour service
• Survived 23 bar H₂S at Brunei LNG plant

Power Plants

• Handles 500+ steam cycles without creep
• Chosen for Malaysia’s 1,000MW coal unit

Chemical Processing

• PTFE-filled versions resist 98% H₂SO₄
• Zero leaks at Batam Island chemical park

“Always match winding density to flange pressure class – our color codes prevent installation mistakes.”
Piping Specialist, Petronas

🔍 Why Smart Engineers Specify Aohong

✓ 23% longer service life in refinery duty
✓ Custom winding patterns for your exact pressure profile
✓ 24/7 technical support – including emergency site visits

🚀 Next-Gen Sealing Technology

• Graphene-enhanced fillers (patent pending) – 18% better recovery
• Smart seals with embedded sensors – text alerts at first micro-leak
• Eco-manufacturing – 40% less energy than traditional methods

🛠️ Selection Guide: Getting It Right

Know Your Media
- • Acids? → PTFE filler
- • Steam? → Mica reinforcement
- • Sour gas? → Titanium rings
Pressure Matters
- • <600 psi → Standard winding
- • 600-1,500 psi → High-density pattern
- • 1,500+ psi → Custom reinforcement
Don’t Forget Thermal Cycling
- • >300°F swings? → Specify expansion slots

Standard Gasket

Aohong Spiral Wound

Sour gas resistance

Fails NACE test

MR0175 compliant

Pressure capacity

900 psi

2,500 psi

Installation error rate

23%

3% (thanks to laser guides)

Life expectancy

2-3 years

5-7 years

Bottom line: When your piping system carries toxic or flammable media, “good enough” gaskets risk lives and facilities. Our spiral wound gaskets deliver failsafe sealing forged in Southeast Asia’s toughest refineries.

NACE MR0175 Certified
ASME B16.20 Compliant
ISO 9001:2025
API 601

Field Tip: Download our flange surface prep checklist – proper cleaning prevents 80% of early failures.