Process & Composition

141 days in 5% Sulfuric Acid
Centrifugal Spun Casting

The casting process of circular pipes make use of a high-speed rotation system to generate centrifugal force in the mould.

Compared with tradition vertical/horizontal casting with vibrator compaction, centrifugal spun casting are proven to be more effective in minimizing void with availability of large surface for air escape and higher G-force from rotation to achieve maximum concrete compaction which direct contribute to structural strength and concrete sustainability.

With solid mould and rotation system, TPP able to assure each pipe are produced with equal mixture distribution, surface flatness and diametrical symmetry.

Comprehensive Corrosive Protection

TPP PRC has the identical chemical resistance similar with protective lining used in Concrete Manhole / Tunnel / Pipe. Without addition layer of lamination or lining, the concrete itself proven has comprehensive resistance against corrosive substances.

Visual and tactile inspection can be done directly on PRC surface without obstruction of lamination or lining. TPP has full confidence on suitability of PRC structural properties.

-ASTM D 543--Resistance to Chemical Reagent

Unsaturated Polyester Resin

TPP's materials are regulated by BS EN 14636-1 and formulized by Japan partner. This particular resin has long track record in Japan and able to maintain concrete structural properties up to 70°C. To date, Japan installed PRC product are still perform up to user expectation.

-BS EN 14636-1--Clause 4.1.2 - HDT ≥ 70°C

Curing Time Frame

Under normal circumstances, TPP’s PRC compressive strength will achieve demoulding strength within 1 hour, achieving 60 N/mm2 within 1 day and 80 N/mm2 within 7 days.

Should there be any urgency or limited storage at project side, TPP pipes can made available provided 7 days for curing up to product standard.

-BS EN 14636-1--Clause 5.4.3 - Compressive Strength ≥ 80 N/mm2

Automated Machinery

Production are operated with automated machinery starting from mixing raw material to demoulding cured concrete, this ensures that each pipe is made with consistency that fulfils the Quality Control Plan.

With fully trained operator and production staff, TPP production team ready to meet high market demand without compromising product quality.

100 Years Lifespan

According to the Independent Laboratory Test Result, our Polyester Resin Concrete has been proven to comply with standard requirements after 100 years.

The long-term durability tests were carried out by applying load on pipe samples for more than 10,000 hours (416 days). The results were then extrapolated to 50 years and proven to meet the standards.

Given the high performance of TPP pipes and regional regulation, we have further extrapolated the results to 100 years, and shown that that our pipe performance can still meet the standard requirements.

-BS EN 14636-1--Clause 5.4.6 - Crushing Strength ≥ 50% initial value after 50 years

Characteristic of PRC

Life Cycle

Economical life cycle cost with higher life span. Minimal maintenance is required over its entire lifespan.

(BS EN: > 50-year lifespan)

Chemical and Water Resistance

Excellent resistance against water penetration and wide range of chemical found in sewage and the ground. This surface is non-permeable by any liquid from the ground and thus maintains its weight throughout the jacking process.

(ASTM: < 0.09% weight loss under corrosive solution)

Stress Resistance

Superior compressive strength with approximate 20% retained as flexural strength. Great resistance against pulsation stress caused by vehicle or environment.

(BS EN: Withstand cyclic load, Lab test > 16 MPa under 3-point bend test)


Thinner and lighter than similar strength class conventional jacking pipe. Product material theoretically able to reduce into half due to higher strength than cement concrete without losing allowable jacking force.

(BS EN : PRC [ 80 MPa & 2.2 T/m3 ] vs RC [ 40 MPa & 2.4 T/m3 ], PRC > 50% weight reduction & same jacking force)

Smooth Exterior

Smoother surface reducing friction and jacking loads during jacking process and optimizing hydraulic performance. Smooth inner surface allows higher flow capacity which directly contribute cost reduction by opt for smaller size.

(Manning’s Coefficient: PRC [ 0.009 ~ 0.012] vs RC [ 0.012 ~ 0.016])

Solid & Durability

PRC pipes are very durable due to its non-corrosive and high impact resistance properties.

(Polyester resin mechanical properties)