Monday, 15 April 2013
- Lightweight bridges are used to carry potable water and pedestrians across river spans up to 632 m in Japan
- 85% Type 304
- 10% Type 316
- Some 2205 near the coast
- No repainting
- 40% cheaper over 30 years
- First one built: 1983
- Max pipe diameter: 0.8 m
- There are now ~3000 such bridges in Japan
Tuesday, 4 September 2012
| Comparison of Various Plumbing Materials | Release: September 1, 2012 | |||||||||||
| Parameter | GI | PPR | cPVIgnore warningC | Compo-site | Copper | SS | Why SS is better | |||||
| Corrosion Resistance | 1 | 5 | 5 | 5 | 4 | 5 | Stainless Steel grades 304/316L have better corrosion resistance. Even copper has Green corrosion of Copper Sulphate which is poisonous | |||||
| Hygiene | 1 | 3 | 3 | 4 | 4 | 5 | Food Grade, Recommended for Drinking water, Food and Pharma equipment | |||||
| Maintenance Free Life | 1 | 3 | 2 | 1 | 3 | 5 | Minimum replacement costs | |||||
| Enhances Building Life | 1 | 3 | 3 | 1 | 4 | 5 | Negligible leakage, hence least damage to building | |||||
| Strength of Pipes | 4 | 2 | 1 | 1 | 3 | 5 | Stainless steel is the strongest among competing materials | |||||
| Ease of Installation | 2 | 2 | 3 | 3 | 2 | 5 | Fast installation with Low Skill worker | |||||
| Earthquake Proof | 3 | 2 | 2 | 5 | 3 | 5 | Withstands the vibrations and shocks due to its ductile nature | |||||
| Cleanability | 1 | 2 | 2 | 2 | 4 | 5 | Lowest deposit buildup due to smooth surface | |||||
| Food Grade | 1 | 2 | 2 | 2 | 4 | 5 | Meets all food grade standards | |||||
| High temperature Application | 3 | 1 | 1 | 1 | 4 | 5 | Retains strength at high temperature | |||||
| Low Temperature Application | 3 | 1 | 1 | 1 | 3 | 5 | Is not brittle at low temperature, unlike plastics or GI | |||||
| Fire Resistant | 4 | 1 | 1 | 1 | 3 | 5 | Withstands High temperature. | |||||
| Experience of Usage | 5 | 1 | 1 | 1 | 5 | 5 | Worldwide usage experinence of 30-40 years | |||||
| Outside Painting Required | 1 | 5 | 5 | 5 | 5 | 5 | No need of painting | |||||
| Deposition of Algae | 2 | 1 | 1 | 2 | 3 | 5 | Smooth surface prevents algae buildup | |||||
| Blockage Problem | 1 | 2 | 2 | 2 | 4 | 5 | No deposit buildup hence no blockage | |||||
| Damage due to Drilling | 4 | 1 | 1 | 1 | 4 | 5 | Strongest material doesn't get damaged due to drilling | |||||
| High Flow Rate of Water | 2 | 3 | 3 | 2 | 3 | 5 | Smooth and Wear resistant at High Flow rate | |||||
| Low Roughness (less scaling) | 1 | 3 | 3 | 2 | 4 | 5 | Smooth surface prevents deposition | |||||
| Usage in Public Building | 1 | 1 | 1 | 1 | 2 | 5 | Strong material not easily damaged | |||||
| Wear Resistant | 1 | 1 | 1 | 1 | 1 | 5 | Not effected by sand or high flow rate | |||||
| Joint Assurance System | 3 | 1 | 1 | 1 | 2 | 5 | No Welding or Solution joining. Permanent Mechanical Joint checked for each joint by gauge | |||||
| Saves Pumping Energy | 1 | 3 | 3 | 2 | 4 | 5 | Smooth surface need less electricity | |||||
| Water Quality affect | 1 | 5 | 5 | 5 | 4 | 5 | No change in water quality during storage | |||||
| Pressure Rating | 3 | 2 | 1 | 1 | 3 | 5 | Highest Design pressure rating of 25 bar | |||||
| Joint Strength | 2 | 1 | 1 | 1 | 2 | 5 | Press fit joint has foolproof and high strength joint | |||||
| Application Range | 3 | 2 | 2 | 2 | 4 | 5 | Used for Air, Water and Many Gases | |||||
| Less conduiting (Jhiri) Requirement | 2 | 1 | 1 | 3 | 3 | 5 | As Pipe dia is less | |||||
| High Wall Strength | 3 | 1 | 1 | 3 | 3 | 5 | Less Brick cutting for piping retains its strength | |||||
| Saving in Labor Cost | 1 | 4 | 5 | 5 | 1 | 5 | Fast installation with Low Skill worker | |||||
| Saving in Installation Time | 1 | 3 | 3 | 5 | 1 | 5 | Fast to install (approx 1/3rd time of GI piping) | |||||
| Application in High Rise Buildings | 3 | 2 | 2 | 2 | 4 | 5 | Not affected by Vibration and Wind Speeds | |||||
| Reduces Space requirement in Shafts | 2 | 1 | 1 | 2 | 3 | 5 | Since lower dia is possible, saving in Shaft sizes possible | |||||
| Life Cycle cost | 1 | 3 | 3 | 1 | 4 | 5 | Lowest lifecycle cost | |||||
| Equivalent ID (NB sizes shown) | 1/2" | 1" | 1" | 1" | 1/2" | 1/2" | Plastics are commonly denoted by OD sizes | |||||
| Low Diameter possible (eq. OD) | 3/4" | 1" | 1" | 1" | 1/2" | 1/2" | High flow rates, less deposits, allow for use of low diameter | |||||
| Cost index (GI = 100%), incl. Labor | 100 | 90 | 80 | 110 | 200 | 140 | Slightly more than GI and others | |||||
| Total 5 * Ratings | 1 | 3 | 4 | 6 | 2 | 34 | Highest Rating in most parameters | |||||
| For any clarifications please contact | RATING: 1= Poor, 5= Best | | ||||||||||
| Pravin Goel, CEO, Rampart India Pvt. Ltd, | ||||||||||||
| Phone: 8800304400, email: pravingoel@outlook.com | ||||||||||||
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