Oil-resistant rubber sheets serve for sealing,isolation and anti-leakage in many industrial applications,ranging from temporary gaskets for equipment maintenance to long-term linings for petrochemical units.Procurement and design personnel often ask what the standard thickness of such sheets is.Instead of one fixed value,there is a clear national standard system and a range of commonly available sizes.
Under the current national standard GB/T 5574—2008 Industrial Rubber Sheets,thickness is specified as nominal dimensions.Typical nominal thicknesses include 0.5 mm,1.0 mm,1.5 mm and 2.0 mm.The standard also defines thickness tolerance,generally around±20%.That means the standard does not lock the thickness to a single figure;it provides a series of nominal sizes together with allowable manufacturing deviation.This point matters greatly.Since rubber sheets are produced by calendering or vulcanization,an absolutely precise thickness is neither achievable nor necessary.
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On the commercial market,oil-resistant rubber sheets cover far more sizes than those listed above.According to reports from multiple third-party testing laboratories and industry yearbooks,commercially available sheets range roughly from 1 mm to 50 mm or thicker.Sheets of 1 mm,2 mm,3 mm and 5 mm are thin and medium-thick grades,widely used for equipment sealing gaskets,flange gaskets and tank linings.Sizes of 8 mm,10 mm,12 mm,15 mm and 20 mm fall into the medium-thick category,commonly adopted for platform flooring,vehicle floors and insulating mats in power distribution rooms.Thicker options at 30 mm and 50 mm are mainly used as shock-absorbing bases for heavy machinery and large sealing assemblies.Such a wide selection exists because thickness is determined by working conditions rather than rigid standard requirements.
It is worth noting that thickness is not the only,nor even the primary,evaluation indicator for oil-resistant rubber sheets.When selecting materials,oil resistance grade and mechanical properties must be confirmed simultaneously.Under GB/T 5574,rubber materials are grouped into Class A(non-oil-resistant),Class B(moderately oil-resistant)and Class C(oil-resistant).Class C requires a volume change rate of-5%to+40%after 72 hours of immersion in No.3 standard oil at 100℃.Excessive volume expansion will cause the rubber to fail,while insufficient swelling may lead to sharp hardness rise and loss of elasticity.In terms of mechanical performance,tensile strength is normally required to be no less than 5 MPa,and above 10 MPa for high-specification applications.Elongation at break shall reach 200%to 250%or higher,and the common hardness range is Shore A 60°to 80°.Together with thickness,these parameters form the complete technical specification of oil-resistant rubber sheets.
Jingdong Rubber Co., Ltd. is a professional rubber sheet manufacturer, producing silicone rubber sheet, natural rubber sheet, fluorine rubber sheet, neoprene rubber sheet, insulating rubber sheet,EPDM rubber sheets, oil-resistant rubber sheets, anti-static rubber sheets, flame-retardant rubber sheets, conductive rubber sheets, anti-slip rubber sheets, and cowshed mats, etc. with over 40 years of industry experience, are popular both at home and abroad. If you need any of our products,please send emails to sales@jingdongrubber.com.