6 Inch ASME B16.5 Klingersil C4400 Gasket for Oil Pipeline Flange

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6 Inch ASME B16.5 Klingersil C4400 Gasket for Oil Pipeline Flange

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Product Description

Overview
Product Description
Detailed Photos
Product Parameters
Certifications
Packaging & Shipping

Basic Info

Model NO.QSG-25-002

TypeOil Seal

PerformanceCorrosion

ShapeO-Ring

StandardStandard, Nonstandard

Flange StandardANSI B16.5

Average Surface Resistance4.1*10e13 Omega

Average Specific Volume Resistance4.5*10e12 Omega Cm

Pressure150#

Thickness3.0mm

Usagefor Oil and Gas Pipeline Sealing

Delivery2-4 Weeks

ColorWhite/Green

Bolt Hole Number8

Thermal Conductivity0.38 W/Mk

Density1.8 G/ Cm3

MaterialsKlingersil C4430/Tealon TF 1590

Transport PackageSea Shipment

Specification6 inch

OriginChina

Packaging & Delivery

Package Size30.00cm * 30.00cm * 4.00cm

Package Gross Weight1.500kg

Product Description

Klinger C4400 Insulation Gasket Kit

C4400 (commonly referred to as KLINGERSIL C-4400) is an asbestos-free sealing sheet composed of aramid fibres bonded with nitrile-butadiene rubber (NBR). Thanks to its outstanding mechanical strength, chemical stability and high-pressure tightness, it is widely used for industrial sealing. The material is examined below under five headings—fluid compatibility, typical industries and applications, low-temperature behaviour, chemical-resistance data and electrical-insulation properties—and illustrated with field cases.

1. Fluid compatibility: broad resistance, but watch out for aggressive chemicals

KLINGERSIL C-4400 tolerates most common industrial media: oils, water, steam, gases, brines, fuels, alcohols, dilute to medium-concentration organic and inorganic acids, hydrocarbons, lubricants and refrigerants. This makes it the "first-choice" universal gasket material in many mixed-duty plants.

It is NOT recommended for strong acids (conc. H₂SO₄, HNO₃), strong alkalis (conc. NaOH), powerful oxidisers (H₂O₂, NaOCl) or special solvents (ketones, esters, chlorinated hydrocarbons) unless prior testing proves acceptability.

Field Case Study

Scenario: A chemical plant flange carrying a 5 % NaOH / 10 % NaOCl bleach solution was sealed with C4400.

Result: After three months the gasket softened, blistered and leaked. Microscopy showed oxidation of the NBR matrix by hypochlorite. A PTFE-based gasket solved the problem.

Lesson: C4400 must not be used in strongly oxidising alkaline service without validation.

2. Industries and applications: multi-sector workhorse, but match the duty

Typical industries:

Chemical: reactors, storage tanks, pipe flanges
Food & beverage: potable-water lines, processing equipment
Power & energy: steam systems, heat exchangers, boilers
Oil & gas: transfer lines, valves, pumps
Automotive & general machinery: sumps, bearing covers, hydraulics
Refrigeration & HVAC: refrigerant circuits

Its high-pressure rating (up to 30 MPa) and dimensional stability perform well at elevated temperature and pressure.

Field Case Study

Scenario: A bottling plant used C4400 gaskets in a plate heat-exchanger heating purified water to 95 °C at 1.2 MPa.

Result: After one year no leakage or ageing was found; the material passed the food-safety audit.

Key: Water medium, moderate temperature—well inside C4400 capabilities.

3. Low-temperature behaviour: no official limit—verify separately

Published data do not quote a minimum service temperature. NBR itself is normally flexible down to about -30 °C, but embrittlement, loss of elasticity and micro-leakage can occur below that point.

Field Case Study

Scenario: A cold-chain logistics firm tried C4400 valve gaskets in an ammonia refrigeration system at -40 °C.

Result: Initial sealing was good, but after winter operation slight weeping appeared. Disassembly showed the gasket had become brittle and lost recovery.

Lesson: For cryogenic service select low-temperature elastomers (FKM, VMQ) or PTFE; C4400 is unsuitable.

4. Chemical-resistance data: volume/mass swells are the key metric

Typical laboratory values:

ASTM Oil No. 3, 150 °C / 5 h: mass gain ≈ 3 %
ASTM Fuel B, 23 °C / 5 h: mass gain ≈ 5 %

These figures show limited oil absorption, still within the range that preserves sealability.

Field Case Study

Scenario: A diesel-generator fuel system (60 °C, diesel similar to ASTM Fuel B) used C4400 gaskets.

Result: After six months no seepage was observed; post-service measurements showed 4.2 % mass increase and 1.8 % thickness increase—both acceptable.

Conclusion: C4400 exhibits good swell control in medium-oil environments and is fit for fuel sealing.

5. Electrical-insulation performance: suitable for medium/low-voltage enclosures

Representative values:

Surface resistivity: ≈ 1.4 × 10¹² Ω
Dielectric strength: ≈ 21.6 kV mm^-1

These levels give adequate insulation for many industrial enclosures.

Field Case Study

Scenario: A motor manufacturer fitted C4400 gaskets in 6.6 kV terminal boxes to provide dust- and moisture-proof sealing with basic electrical isolation.

Result: After two years no tracking or breakdown had occurred.

Key: The dielectric strength comfortably exceeds the service voltage.

Summary - Where C4400 Excels and Where It Does Not

Property	Strengths	Watch-points
Fluid compatibility	Oils, water, steam, mild acids/bases	Avoid strong acids, alkalis, oxidisers
Industry range	Chemical, food, power, automotive, etc.	Match gasket style & flange rating
Low-temperature	No data below -30 °C	Do not use in cryogenic service
Chemical resistance	Oil swell < 5%	Check swell vs. flange relaxation
Electrical insulation	High ρs, good Er	For medium/low voltage only

Recommendation: Before selecting C4400 always cross-check the actual fluid, temperature, pressure, flange material and required tightness class. For extreme duties (strong corrosion, deep cryogenics, powerful oxidants) consider upgraded materials such as PTFE, FKM, spiral-wound or serrated metal gaskets.

Detailed Photos

ASME B16.5 Gasket for Oil Pipeline Flange Detail 1

ASME B16.5 Gasket for Oil Pipeline Flange Detail 2

ASME B16.5 Gasket for Oil Pipeline Flange Detail 3

ASME B16.5 Gasket for Oil Pipeline Flange Detail 4

Other Factory Products

Product Parameters

PRODUCT MATERIAL CERTIFICATE (as per EN 10204.3.1)

Certificate No.: J230621 | Date: 2025.7.28

Order No.	Product Name	Size Specifications	Flange Standard	Material Specifications				QTY
Order No.	Product Name	Size Specifications	Flange Standard	Retainer	Sleeve	In. Washer	S. Washer	QTY
QS230615	Insulation Gasket Kit	10" 150# E-3	ASME B16.5 WN	Klingersil C4400	G10	G10	ZPS	10set
QS230615	Insulation Gasket Kit	8" 150# E-3	ASME B16.5 WN	Klingersil C4400	G10	G10	ZPS	15set
QS230615	Insulation Gasket Kit	4" 150# E-3	ASME B16.5 WN	Klingersil C4400	G10	G10	ZPS	20set
QS230615	Insulation Gasket Kit	2" 150# E-3	ASME B16.5 WN	Klingersil C4400	G10	G10	ZPS	10set

Retainer Material Properties

Material	Dielectric Strength (Volt/Mil)	Compressibility %	Recovery %	Max. Working Pressure (Bar)	Max. Working Temperature (ºC)
Klingersil C4400	540	11	55	100	+400

Washer Material Properties

Material	Dielectric Strength (Volt/Mil)	Compressive Strength (Psi)	Tensile Strength (Psi)	Water Absorption %	Working Temperature (ºC)
G10 Sheet	650	50,000	47,000	0.08	+150

Sleeve Material Properties

Material	Dielectric Strength (Volt/Mil)	Water Absorption %	Working Temperature (ºC)
G10 Sleeve	550	0.1	+150

Steel Washer Material Properties

Material	Chemical Composition							Mechanical Properties
Material	C %	Si %	Mn %	P %	S %	Ni %	Cr %	Y. S. (N/mm²)	T. S. (N/mm²)	EL. %
CS	0.14	0.02	0.57	0.014	0.007	0.002	0.008	340	455	35

* THE PRODUCTS HAVE BEEN CHECKED UP TO ASME B16.5 STANDARD AND ARE FINALLY QUALIFIED FOR DELIVERY.

Certifications

Packaging & Shipping

Frequently Asked Questions (FAQ)

What is Klingersil C4400 material composition?

Klingersil C4400 is a high-quality, asbestos-free sealing material composed of aramid fibers bonded with synthetic nitrile-butadiene rubber (NBR).

Is Klingersil C4400 compatible with strong acids and alkalis?

No, C4400 is not recommended for strong acids, strong alkalis, or powerful oxidizers. It is ideal for oils, water, steam, fuels, gases, hydrocarbons, and dilute acids or bases.

Can C4400 gaskets be used in low-temperature or cryogenic applications?

No. NBR becomes brittle and loses recovery below -30 °C, which may result in micro-leakage. For cryogenic applications, low-temperature elastomers or PTFE gaskets are recommended.

Does C4400 provide electrical insulation?

Yes, it has a high surface resistivity (approx. 1.4 × 10¹² Ω) and good dielectric strength (21.6 kV/mm), making it suitable for electrical isolation in medium and low-voltage enclosures.

What is the maximum working pressure and temperature of this gasket kit?

The Klingersil C4400 retainer sheet supports a maximum working pressure of up to 100 bar and handles working temperatures up to +400 ºC.