Products Rank
Contact Us

Mobile: 0086 150 2060 7787
Email: sales@dragonuhmwpe.com

Your present location:HomeProductsUHMWPE pipes > UHMWPE Pipe in Marine & Dredging
  • Product name: UHMWPE Pipe in Marine & Dredging
  • item No: 4009

     

Ultra-high molecular weight polyethylene (UHMWPE) is a kind of engineering thermoplastics with more than 3 million viscosity-average molecular weight. It differs from PE standard grades in its very high degree of polymerization. Ultra-high molecular weight polyethylene pipe has superior performance over conventional HDPE pipe such as very high wear resistance, impact resistance, intrinsically self-lubricating, anti-adhesion, low temperature resistance and excellent chemical resistance.

UHMWPE pipe has excellent wear resistance, compare with the traditional dredging steel pipe, its conveying flow is 4 times than steel pipe (it means the life time is 4 times than steel pipe), can effectively reduce the pipe replacement frequency and save the maintenance cost in the process of construction. Because of low roughness, 20% energy will be saving than the steel pipe when running, reduce the operating cost. Light weight, strong flexibility,can greatly reduce the cost of installation, improve the comprehensive benefit of construction.

 

Specification Weight Table as below:

 

UHMWPE denotes Ultra High Molecular Weight Polyethylene which is a polyethylene polymer with an average molecular weight is greater than 3,100,000 as defined by ASTM D4020 – Standard

specification for UHMWPE polymers.  This molecular weight is well above the molecular weight of most typical polymers which are between 1,000,000 and 400,000 thus earning the title Ultra

High Molecular Weight Polyethylene. Polyethylenes with molecular weight in the 3.1 -4.5 Million range have been found to exhibit the best combination of impact strength and abrasion

resistance. For Polyethylene molecular weight classification the following guidelines can be used:

 

lHDPE (High Density Polyethylene):    100,000 – 400,000 MW
lHMWHDPE (High Molecular Weight High Density Polyethylene)    500,000 – 1,999,999
lVHMWHDPE (Very High Molecular Weight High Density Polyethylene)    2,000,000 – 3,100,000
lUHMWPE (Ultra High Molecular Weight Polyethylene)    > 3,100,000 + MW
 
Characters of UHMWPE Pipe 
1. Abrasion resistance – UHMWPE pipes have excellent abrasion resistance providing long life in abrasive slurry applications
2. 5x lower surface roughness (ISO 8295)
3. Increased temperature capability (particularly in the lower range), capable of -70 to +80 deg C operation
4. Comparable elongation performance
5. Anti-aging agent reduce UV degradation by comparison and otherwise increases design life
6. Colourless, odourless and non-toxic
7. Formed flanges, allowing for clean alignment. Mn16 inserts used at flange end to reduce turbulence down the pipe or bend
8. Much higher corrosion resistivity, comparable to Teflon 
9. Higher tensile and yield tolerances
10. Adders can be provided that make UHMWPE flameproof (allowing for minimal degradation in environments where this is a factor, UHMWPE will still ignite at 300 deg C, but will immediately self-rectify)
11. Lighter and more durable, allowing for heavily reduced installation costs as large excavation and crane equipment will no longer be required
12. Unlike other materials, UHMWPE is self-lubricating (part of why it is used as a ball material for hip joint replacement)
13. All this allows UHMWPE to improve on ANY process currently utilising HDPE and most that include Steel

Product is checked and re-checked at every stage to ensure fault-free performance

 

       

 

Technical comparison of UHMWPE and other material

 

Item

Test Method

Unit

Uhmwpe pipe

Hdpe pipe

Steel pipe

Viscosity-average

Molecular Weight

ISO1628-3

104g/mol

300-1050

50

--

Approx Melting

Temperature

ISO11357.3

136

1129

1410

Water Absorption

ISO62-1999

%

0.01

0.01

--

Coefficient of liner thermal expansion

ISO11359-2

10-4/℃

1.5

1.2

0.17

Density

ISO1183-1-2004

g/cm3

0.935-0.945

0.940

7.8

(0.45Mpa)

Head deformation tempat

ISO75

85

71

1230

Tensile strength

ISO527

Mpa

39

25

550

Yield strength

ISO527

Mpa

≥22

20

≥245

Tensile elongation

ISO527

%

≥250

≥350

20

Gap beam impact

Strength

ISO179

KJ/m2

No fracture

27

No fracture

Rockwell hardness

ISO2039-2

R

40

33

45(C)

Friction coefficient

ISO8295

--

0.05-0.11

0.28

0.58

Mortar wearindec

--

--

1

10

7

Scaling

--

--

No scaling

Slight

Heavy

Corrosion resistance

--

--

excellent

Common

Bad

Mine Industrial: mineral mud conveying, high pressure water supply, gas supply pipeline underground coal mine.

Electric Power System: fly ash conveying of power plant, chemical water cycle and sulfur removal system 

Coal Mine Industry: coal powder/ pulverized coal,coal water slurry transportion, mine air supply, ventilation and drainage systems , and the desulphurization system

Chemical Industry: transmission of high corrosive medium, like strong acid, strong alkali, etc and conveying of bittern, salt slurry, crude salt of salt chemical 

Oil exploitation:transportation of crude oil and natural gas, waste water reinjection

Metallurgy Industry: conveying of coke powder, mineral powder, pulp and oil refining slag   

Dredging Projects: dredging work, sediment transportation of the river, lake, sea port, wharf, etc 

Marine Engineering: conveying of seawater, fresh water in desalination process


 

 
Message:
* Entered characters:0 Word
Less than or equal500Character
E-mail:
*
Example:example@mail.com
Phone:
 
By the numbers, "+" and "-" in the bar, a maximum of 20 characters
Verification code: