Gasket

Our pipe gaskets are manufactured from metal winding, graphite, PTFE and stainless steel, featuring excellent sealing performance and strong high-temperature & corrosion resistance. Multiple styles including spiral wound gasket, metal flat gasket, ring joint gasket. Precise cutting ensures accurate size and zero leakage. Strict full-process inspection guarantees stable sealing performance. Widely used in oil & gas, petrochemical, power, marine, water treatment and construction piping flanges.

Inquire

Product Information

Certified:

All gaskets are supplied with complete factory test reports including raw material composition, compression resilience, dimensional check, high temperature resistance and air tightness test. Products comply with ISO, ASTM, ASME, DIN, EN and JIS standards. Material mill certificates EN 10204 3.1 / 3.2, third-party inspection certificates and full shipping documents can be provided on request to achieve full quality traceability for global industrial buyers.

Application:

Gaskets are core sealing components installed between flange joints of all industrial piping systems to prevent medium leakage. In oil & gas transmission, they seal flange connections under high temperature and pressure for crude oil and natural gas delivery. Petrochemical facilities adopt anti-corrosion composite gaskets to seal pipelines connected to reactors, storage tanks and corrosive medium delivery pipelines.

Thermal and nuclear power plants use high-temperature resistant spiral wound gaskets for boiler and steam pipeline flange sealing to sustain long-term extreme working environments. Marine and offshore projects adopt seawater resistant metal gaskets for fuel, ballast and fire-fighting pipe flange joints on ships and platforms. Water treatment and desalination plants equip anti-aging PTFE gaskets for pump and filter pipeline flange sealing. In construction, gaskets are widely installed in HVAC, fire protection and plumbing flange joints for reliable long-term sealing. Sanitary PTFE gaskets are adopted in food and pharmaceutical workshops to meet strict hygiene standards without medium contamination.

Specification:

1. Product Specification

Parameter	Detailed Specification
Product Type	Spiral Wound Gasket, Metal Flat Gasket, Ring Joint Gasket, PTFE Gasket, Graphite Gasket, Corrugated Metal Gasket
Size Range	1/2" – 60" (DN15 – DN1500), customized sizes available
Pressure Rating	Class 150, 300, 600, 900, 1500, 2500 (PN20 – PN420)
Matching Flange Type	RF Flange, RTJ Flange, FM/M Flange, Groove Flange
Manufacturing Process	Raw Material Cutting, Winding Forming, Punching, Surface Treatment, Precision Trimming
Applicable Standards	ASME B16.20, ASME B16.21, MSS SP-44, DIN 2690, EN 12560, JIS B2404, GOST 17378, ISO 7483
Material Grades	Carbon Steel Strip: A234 WPB / Stainless Steel Strip: 304, 304L, 316, 316L, 321 / Filler: Flexible Graphite, PTFE, Ceramic, Non-asbestos

2. Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Ni	Mo
A234 WPB	≤0.30	≤0.35	0.29–1.06	≤0.035	≤0.035	≤0.40	≤0.40	—
304	≤0.08	≤0.75	≤2.00	≤0.045	≤0.030	18.0–20.0	8.00–10.5	—
304L	≤0.03	≤0.75	≤2.00	≤0.045	≤0.030	18.0–20.0	8.00–12.0	—
316	≤0.08	≤0.75	≤2.00	≤0.045	≤0.030	16.0–18.0	10.0–14.0	2.00–3.00
316L	≤0.03	≤0.75	≤2.00	≤0.045	≤0.030	16.0–18.0	10.0–14.0	2.00–3.00
Grade	C	Si	Mn	P	S	Cr	Ni	Mo
A234 WPB	≤0.30	≤0.35	0.29–1.06	≤0.035	≤0.035	≤0.40	≤0.40	—

Standard:

Classification	Grade	Applicable Standard	Key Chemical Composition (wt%)	Key Mechanical Properties (Room Temperature)
Carbon Steel Strip	A234 WPB	ASTM A234	C≤0.30, Mn 0.29~1.06, S≤0.035, P≤0.035	TS≥415MPa, YS≥205MPa, EL≥22%, H≤156HB
Austenitic Stainless Steel Strip	304	ASTM A480	C≤0.08, Cr 18.0~20.0, Ni 8.00~10.5	TS≥520MPa, YS≥205MPa, EL≥35%, H≤90HRB
	304L	ASTM A480	C≤0.03, Cr 18.0~20.0, Ni 8.00~12.0	TS≥480MPa, YS≥170MPa, EL≥35%, H≤90HRB
	316	ASTM A480	C≤0.08, Cr 16.0~18.0, Ni 10.0~14.0, Mo 2.00~3.00	TS≥520MPa, YS≥205MPa, EL≥35%, H≤90HRB
	316L	ASTM A480	C≤0.03, Cr 16.0~18.0, Ni 10.0~14.0, Mo 2.00~3.00	TS≥480MPa, YS≥170MPa, EL≥35%, H≤90HRB

Process:

图片1.png

Packing:

图片2.png