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Automated Casting Machine

Polyurethane

Polyurethane is a highly versatile, robust material that is superb for pipeline pigging wear parts

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Products

Propipe Limited uses PolyPro-3 MDQ (PP-3) to produce all polyurethane components. This material is a polyester based three-component polyurethane elastomer system that has an excellent level of physical properties. It has a high tensile and tear strength, outstanding abrasion resistance plus a high level of resistance to oils, fuels and weathering.

For most pipelines, wet and dry: coated or uncoated, PP-3 provides long pig life with excellent performance for up to 800km. It is the system that is used in most pipeline pre-commissioning and commissioning operations. 

65° Shore A applies to Bi-Di Sealing Discs, these discs require good flexibility and low abrasion loss 

75° Shore A is a mid-range hardness, this is generally used for standard and conical cups, as well as combined sealing/guide discs.

85° Shore A is used for Bi-Di Guide Discs, giving a more rigid and tough component which aid support throughout the pipeline

95° Shore A hardness is generally used for the manufacture
of circular and triangular brushes, as well as specialist
guiding noses.

Material Characteristics

  • Mercury free quasi MDI technology 
  • Ester formulated polyol
  • Exceptional abrasion and tear resistance
  • Very good resistance to hydrolysis
  • Good resistance to chemicals (hydrocarbons, oils, solvents)
  • Good mechanical properties at low temperature 
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Mould rings

The table below gives typical physical properties.

 

HARDNESS
AT
20°C

DIN
53505

Unit

65
A

75
A

85
A

95
A

     

SHORE
HARDNESS

10% Modulus

DIN 53504

MPa

0.6

0.9

2.1

6.0

100% Modulus

DIN 53504

MPa

2.6

3.9

7.0

13.8

200% Modulus

DIN 53504

MPa

3.9

6.2

10.7

17.7

300% Modulus

DIN 53504

MPa

5.6

9.1

14.8

21.5

Tensile strength

DIN 53504

MPa

41

51

47

37

Elongation at break

DIN 53504

%

560

535

530

510

Tear strength : without nick

ISO 34-1

kN/m

56

74

106

142

Tear strength : with nick

ISO 34-1

kN/m

22

27

38

72

Resilience

DIN 53512

%

42

38

30

36

Abrasion loss

ISO 4649

mm³

30

30

40

40

Compression set (deflection
/22h / 70°C)

ISO 815-1

%

17

18

20

31

Hardness at -5°C

DIN 53505

Shore

68
A

78
A

90
A

99
A

Hardness at 80°C

DIN 53505

Shore

61
A

70
A

83
A

95
A

Specific gravity

-

-

1.21

1.21

1.22

1.24

Datasheet