ASME B16.21 Non-Metal Sealing Non-Asbestos Fiber Asbestos Free Gasket

• Customization: Available
• Material: Non Asbestos
• Application: Oil & Gas Pipeline Service
• Model NO.: G-028
• Type: Pipeline Seal
• Performance: Seal
• Shape: O-Ring
• Standard: Standard, Nonstandard
• Flange Standard: ANSI B16.5
• Delivery: 2-4 Weeks
• Service: for Oil and Gas Pipeline Sealing
• Gasket Standard: B16.21
• Pressure: 150lb 300lb 600lb
• Flange Face: RF FF
• Transport Package: Sea Shipment
• Specification: 1/2"-24"
• Trademark: Qishine
• Origin: China

Product Description

Company Profile

Non-asbestos gasket is made from special non-asbestos heat-resisting fiber, natural rubber compound heating and compression molding. It eliminates asbestos rubber sheet essentially and thoroughly. The maximum dimension reach 2700 x 2700mm.

Certifications

 

Non-Asbestos Fiber materials are so-called because they fill the gap in the range of gasket materials previously occupied by asbestos. Asbestos, although now known to be a dangerous material, had excellent heat resistance properties, which is why it was utilised so widely in high temperature applications. When asbestos was outlawed, replacement materials were needed; and so these asbestos-free, or non-asbestos, materials were developed to perform the same function, but without the corresponding danger to human health.

These materials are now commonly comprised of aramid fibre (Kevlar) and non-organic fibres, which are in turn blended with different polymers to meet different applications: most commonly nitrile rubber, for fuel and oil resistance. These materials can also be graphite coated for non-stick and steam resistance, mixed with PTFE for excellent chemical resistance, or with EPDM for potable water applications.
 

Common Industries Utilising Non-Asbestos Fiber, Non-asbestos Gasket
 

· Oil and Gas

· Chemical Processing

· Petrochemical Industry

· Process Industry

Dimensions of Non-Metallic Flat Gaskets, ASME B16.21 to be used with Raised Face flanges ASME b16.5

 

 Gasket Dimension




 

Class 150 to 900 NPS 1/2 to 24

NPS	d1	d2
		Class 150	Class 300	Class 400	Class 600	Class 900
1/2	21	48	54	54	54	64
3/4	27	57	67	67	67	70
1	33	67	73	73	73	79
1.1/4	42	76	83	83	83	89
1.1/2	48	86	95	95	95	98
2	60	105	111	111	111	143
2.1/2	73	124	130	130	130.2	165
3	89	137	149	149	149	168
3.1/2	102	162	165	162	162
4	114	175	181	178	194	206
5	141	197	216	213	241	248
6	168	222	251	248	267	289
8	219	279	308	305	321	359
10	273	340	362	359	400	435
12	324	410	422	419	457	498
14	356	451	486	483	492	521
16	406	514	540	537	565	575
18	457	549	597	594	613	638
20	508	606	654	648	683	699
24	610	718	775	768	791	838

 

General notes:

· Dimensions are in millimeters unless otherwise indicated.

· d1 = Inside diameter.

· d2 = Outside diameter.

· Dimensional tolerances outside diameter NPS 12 and smaller: +0 / -1.5 mm.

· Dimensional tolerances outside diameter NPS 14 and larger: +0 / -3.0 mm.

· Dimensional tolerances inside diameter NPS 12 and smaller: ± 1.5 mm.

· Dimensional tolerances inside diameter NPS 14 and larger: ± 3.0 mm.

· Thickness (t) specified by customer.