Rubber Lining

WEAR PROTECTION LINING SOLUTION

Rexline engineering is globally recognized leader in design, manufacture and installation of Rexline premium wear & corrosion solutions.

REXLINE™ lining rubber is a versatile and durable solution for a wide range of corrosion and wear protection applications.  Lining rubber is designed primarily to be applied as a lining to protect your equipment from the damaging effects of abrasion and impact forces or chemical attack.

REXLINE PREMIUM COLD LINING TANKS

REXLINE PREMIUM COLD LINING CHUTE

Wear & Abrasion

  • Wear and Abrasion is the process of wearing down or rubbing away by means of friction
  • Wear and Abrasion can also be found in wet and dry service conditions
  • Excessive wear and abrasion results in substrate failure

RUBBER LINING

Dependable & Long Term Protection For Plant Equipment Against Corrosion And Abrasion

Selection of Rubber Lining

  • Resistant
    1. chemically (% concentration)
    2. thermally (operating temperature)
    3. mechanically (abrasion, impact, cut, gouge)
    4. environmentally (ozone)
  • easy to apply
  • well priced
  • easy to repair
  • logistically economical
  • optically appealing

Configuration of Rubber Lining

Corrosion Protective Lining

A protective layer that delayed the permeability of gas/vapor/liquid reaching the substrate

When vapor/liquid pass the lining layer, it will destroy the primer and causing delamination of lining layer

Specification of Rubber

When selecting rubber lining materials, the following physical properties shall be considered :

  • Tensile strength
  • Elongation at break
  • Density
  • Hardness
  • Abrasion
  • Rebound resilience
  • Tear growth resistance

Sample of Rubber Specification

60 IL Properties Unit Typical Value Test Method Rexline Premium
Tensile  Strength Kg/cm2 80 JIS K 6251 255
Elongation % 300 JIS K 6251 900
Hardness A type 59±7 JIS K 6253 38±5 Sh A
Bonding  Strength Kg/cm 5 JIS K 6256 32

Chemical Chart

Type of Rubber Lining

Type of Rubber Lining Based on Curing System

1)Hot Lining System

2)Cold Lining System

Type o Rubber Lining Based on Hardness

1)Soft Rubber

2)Hard Rubber/ Ebonite Rubber

Most Popular Type Material of Rubber Lining:

  1. Natural Rubber

NR has good physical properties such as abrasive, tensile strength, tear strength and elongation break. Other that NR has good chemical resistance

  1. Butyl Rubber

Butyl rubber has Excellent chemical rubber, so butyl rubber suitable for chemical tank and other equipment with high concrentarion chemical.

  1. Chloroprene Rubber

Chloroprene rubber has excellent bonding, so the CR is commonly used for adhesive product. CR suitable for lining sea water equipment because CR has antibacterial sea water.

  1. Hard Rubber

Hard rubber is widely use as protective lining for highly  corrosive substance at elevated temperature

  1. Sand-hard ( Soft-hard-soft )

The soft rubber outer layer against abrasion, when chemical permeate the soft rubber layer, it will be  stopped by middle layer of hard rubber. The last layer  of soft rubber form a strong bonding to the steel and  also can take the thermal expansion of the tank.

Material & Application

HOT LINING SYSTEM

COLD LINING SYSTEM

Rubber Lining Application

Comparison Curing Method

Hot Lining System Cold Lining System
PRIMER Metal Primer

Second Primer

Metal Primer
RUBBER Uncure Rubber Cured Rubber
CURING SYSTEM Autoclave, Exhaust Steam Lining is cured, no additional curing is required
VISUAL Visual depend curing, if use exhaust steam possible occur bubble and or rubber compound. Smooth visual
FINISHING Lot of Finishing job depend after curing A little finishing job
PRODUCTION TIME Long Time Fast Time
REPAIR Small Area : Grinding , Rubber Pasta

Large Area : Cured Rubber, steam block

Grinding , Rubber Pasta
BONDING STRENGHT Minimum 13 kg/inch, but depend to curing process Minimum 13 kg inch
OPERATIONAL AFTER LINING After finishing , equipment can used Minimum 5 hours after application , equipment can used
SAFETY JOB When steam process should be cautiously because related with boiler

(pressure & heat temperature)

Application with cold lining is very safe
PRICE Material rubber is more cheaper than Cured rubber, but operational  and investment more expensive. Material rubber expensive, but application and investment more cheaper

Production Time

HOT LINING SYSTEM

Activity Time
Surface Preparation Based On Standard
Metal Primer Based On Standard
Second Primer Depend area
Rubber Lining Application Based On Standard
Steam 48 – 72 hours with exhaust steam,

4-6 hours with autoclave

Finishing Depend curing process

 

COLD LINING SYSTEM

Activity Time
Surface Preparation Based On Standard
Metal Primer Based On Standard
Second Primer Depend area
Rubber Lining Application Based On Standard
Steam 48 – 72 hours with exhaust steam,

4-6 hours with autoclave

Finishing Depend curing process

Rubber Lining Inspection

  • HUMIDITY
    • Standard
      • Max RH 85%
      • Min Diff Dew Point 3⁰C
      • The conditions shall be monitored and recorded throughout the application (start from surface preparation till rubber lining application) to maintain bonding quality
  • ROUGHNESS
    • Standard
      • Min 60 micrometer

SURFACE BLAST CLASS (METAL):

Sa 1 Light blast-cleaning. SSPC-SP-7

When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter (see note 2). See photographs B Sa 1, C Sa 1 and D Sa 1.

Sa 2 Thorough blast-cleaning. SSPC-SP-6

When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from most of the mill scale, rust, paint coatings and foreign matter. Any residual contamination shall be firmly adhering (see note 2 below). See photographs B Sa 2, C Sa 2 and D Sa 2.

Sa 2½ Very thorough blast-cleaning. SSPC-SP-10

When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from mill scale, rust, paint coatings and foreign matter. Any remaining traces of contamination shall show only as slight stains in the form of spots or strippes. See photographes A Sa 2½, B Sa 2½, C Sa 2½ and D Sa 2½.

Sa 3 Blast-cleaning to visually clean steel. SSPC-SP-5

When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and shall be free from mill scale, rust, paint coatings and foreign matter. It shall have a uniform metallic colour. See photographs A Sa 3, B Sa 3, C Sa 3 and D Sa 3.

RUST GRADE:

Surface Preparation Grades of Blast Cleaned Steel

Assessment of degree of removal of rust, mill scale and other visual containments

(inspected without magnification)

IMPORTANT NOTE:

Surface cleanness is not a measure of Surface profile. See the following pages for Notes on surface profile

Rust Grade A:

Steel with mill scale layer intact and very minor, or no rusting

Rust Grade B:

Steel with spreading surface rust, and the mill scale commenced flaking

Rust Grade C:

Rusty steel with the mill scale layer flaked and loose, or lost, but only minor occurrence of pitting

Rust Grade D:

Very rusty steel with the mill scale layer all rusted and extensive occurrence of pitting

PHOTO GALLERY