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Metal Graphite Gaskets

  • Heat-Resistant Graphite Gasket for Exchangers
Heat-Resistant Graphite Gasket for Exchangers

Heat-Resistant Graphite Gasket for Exchangers

Gaskets are available to EN 1514-1, ASME B 16.21. Custom dimensions are available on request.

Thickness:1.0mm~ 20.0mm

Reinforced inserted material


Temperature(°C)

Compressibility(

%)



Recovery(%)



Standard


In oxidizing media

In non oxidizing media

carbon steel sheet

-10~450

-10~550

30~35

15~20

Non-standard

SS304,SS316

-240~450

-200~600

30~40

15~30

EN1514-1

SS304,SS316 Flat

sheet


-240~450


-200~600


40~50


10~15


ASME B16.21

SS304 Mesh

-240~450

-200~600

30~35

15~20

HGT 20606


Product Overview


The DH-G-SF Xinsen-G Graphite Gasket is a premium high-temperature sealing solution made from Xinsen-G expanded graphite (99.5% carbon content) bonded with stainless steel core mesh. Produced via calendering and die-cutting, it balances flexibility and structural integrity, meeting ASME BPVC III, API 601, and ISO 15797 standards. Standard sizes (50×50mm to 2500×2500mm, thickness 0.5mm-15mm) and custom shapes (ASME B16.5 flanges) are available, with a 24-month shelf life (dry storage).


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Product Features


Thermal Resistance: Continuous 500℃ (oxidizing), 650℃ (inert gas); short-term resistance up to 700℃ (30 minutes).

Pressure Capacity: Static pressure up to 30MPa, dynamic pressure up to 18MPa – exceeds non-reinforced graphite gaskets by 40%.

Chemical Compatibility: Resists acids (98% H₂SO₄), alkalis (40% NaOH), and molten salts; corrosion rate < 0.03mm/year in seawater.

Mechanical Strength: Tensile strength 15MPa, compression rebound ≥ 50%; no fracture after 500 flex cycles.

Anti-Oxidation: Ceramic coating reduces weight loss to < 0.8% after 1000h at 500℃ (ASTM G113).


Applications


Power Generation: Boiler manholes (450℃, 15MPa), turbine exhaust flange seals.

Oil Refining: Hydrocracker reactor flanges (400℃, 25MPa), catalytic converter gaskets.

Chemical Processing: Autoclave doors (350℃, 20MPa), chlor-alkali electrolyzer seals.

Metallurgy: Furnace flue gas duct flanges, molten metal transfer pipe joints.


FAQ


How to prevent graphite powder shedding?

Shedding (common in pure graphite gaskets) is eliminated by:

Stainless steel core reinforcement (316L mesh, 0.1mm thickness) that binds graphite particles.

PTFE surface treatment (5μm coating) that seals surface pores.

Ensuring flange roughness Ra 0.6-1.0μm (too smooth surfaces cause powder transfer).


What is the difference between Xinsen-G and regular graphite?

Xinsen-G graphite has higher expansion ratio (300:1 vs. 200:1) and lower ash content (<0.5% vs. 1.2%), resulting in:

25% better compression rebound.

30% lower leakage rate.

40% longer service life in high-temperature applications.


News

Contact Us

Tel:86-571-89967020

Fax:+86-571-89967015

Phone:15869109368

Email:mecnmecnme@gmail.com

Add:No. 151,ZiDingXiang Road, ShangCheng District, Hangzhou, Zhejiang, China