Riddhi Siddhi Impex is a leading manufacturer, stockist, and supplier of high-quality metal products including pipes, tubes, fittings, flanges, sheets, and plates. Headquartered in Mumbai, Maharashtra, the company has built a strong presence across India and overseas by delivering superior-quality industrial products to diverse sectors such as oil and gas, chemical processing, water supply, and power generation. One of their highly demanded offerings in recent years is PP Coated Carbon Steel Pipes, which combine the strength of carbon steel with the corrosion resistance and chemical protection of polypropylene (PP) coating. These pipes are engineered to perform in aggressive environments where uncoated steel may suffer from corrosion, abrasion, or chemical attack..
PP Coated Carbon Steel Pipes are essentially carbon steel pipes that are externally coated with a protective layer of polypropylene (PP). This coating acts as a shield against environmental and chemical degradation, providing outstanding resistance to moisture, acids, alkalis, and mechanical damage. The coating process often involves a three-layer polypropylene system (3LPP) — comprising an epoxy primer for adhesion to the steel surface, a copolymer adhesive layer, and an outer PP coating that gives exceptional toughness. This multilayer structure makes the pipes suitable for both underground and submerged pipeline applications, ensuring long service life and reduced maintenance costs..
The base material, carbon steel, provides excellent tensile strength, ductility, and load-bearing capacity, making it ideal for high-pressure fluid transmission. When combined with a durable PP coating, it becomes a versatile product suitable for extreme operating conditions. The coating not only protects against corrosion but also enhances the pipe’s resistance to impact, abrasion, and temperature fluctuations. This combination ensures superior performance in industrial installations such as chemical plants, refineries, water treatment facilities, and oil and gas transportation networks. The pipes are generally manufactured according to international standards like ASTM, API, ISO, and DIN, ensuring compliance with global quality benchmarks...
Riddhi Siddhi Impex utilizes advanced coating technology and precision manufacturing to ensure consistent quality and adherence to technical specifications. The company offers PP-coated pipes in various diameters, thicknesses, and lengths, catering to both standard and customized requirements. Each pipe undergoes strict quality control measures such as surface preparation, adhesion testing, coating thickness inspection, and hydrostatic testing to guarantee performance and reliability. The use of environmentally friendly coating materials and modern machinery also reflects the company’s commitment to sustainability and innovation in manufacturing..
In terms of applications, PP Coated Carbon Steel Pipes are used across multiple industries. They are particularly favored in oil and gas pipelines, water distribution systems, chemical processing units, and wastewater management plants, where corrosion resistance and mechanical strength are crucial. In coastal or humid environments like Kochi, Mangalore, and Visakhapatnam, these pipes offer superior protection against saltwater corrosion. In industrial hubs like Vadodara, Dahej, Surat, and Ahmedabad, where exposure to aggressive chemicals is frequent, PP coating provides an effective barrier, extending the lifespan of the pipeline infrastructure..
| Product | PP Coated Carbon Steel Pipes |
|---|---|
| Base Material | Carbon Steel (ASTM A106 / API 5L / ASTM A53) |
| Coating Material | Polypropylene (PP) – 3 Layer or Single Layer |
| Standard | ISO 21809-1 / DIN 30678 / ASTM / API |
| Size Range | 1/2" NB to 48" NB (and custom sizes on request) |
| Wall Thickness | Sch 20 to Sch 160 / XXS |
| Length | Single Random, Double Random, or Cut Lengths |
| Coating Thickness | 1.8 mm to 4.5 mm (customizable) |
| Pipe Ends | Plain End (PE), Beveled End (BE), or Threaded |
| Finish | External PP Coating, Internal Epoxy / Uncoated (as required) |
| Form | Seamless, Welded, ERW, or LSAW Pipes |
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.23 Max |
| Manganese (Mn) | 0.30 – 1.06 |
| Phosphorus (P) | 0.05 Max |
| Sulfur (S) | 0.045 Max |
| Silicon (Si) | 0.10 – 0.35 |
| Copper (Cu) | 0.40 Max |
| Nickel (Ni) | 0.40 Max |
| Chromium (Cr) | 0.40 Max |
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength (0.2% offset) | ≥ 240 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 95 HRB |
| Impact Resistance | High (due to PP coating) |
| Coating Adhesion | Excellent adhesion as per ISO 21809-1 |
| Nominal Pipe Size (NB) | Outside Diameter (mm) | Wall Thickness (mm) | Length |
|---|---|---|---|
| 1/2" | 21.3 | 2.77 | Up to 12 m |
| 1" | 33.4 | 3.38 | Up to 12 m |
| 2" | 60.3 | 3.91 | Up to 12 m |
| 4" | 114.3 | 6.02 | Up to 12 m |
| 6" | 168.3 | 7.11 | Up to 12 m |
| 10" | 273.1 | 9.27 | Up to 12 m |
| 16" | 406.4 | 12.70 | Up to 12 m |
| Standard | Grade |
|---|---|
| ASTM | A106 Grade B / A53 Grade B |
| API | 5L Grade B / X42 / X52 |
| EN | EN 10216 / EN 10224 |
| DIN | St 37.2 / St 52.3 |
| BS | 3601 / 3602 |
| Standard | Description |
|---|---|
| ISO 21809-1 | External Polypropylene Coatings for Buried or Submerged Pipelines |
| DIN 30678 | 3-Layer Polypropylene Coating for Steel Pipes |
| ASTM A106 | Standard Specification for Seamless Carbon Steel Pipe |
| API 5L | Specification for Line Pipe |
| Type | Description |
|---|---|
| FBE Coated Pipes | Fusion Bonded Epoxy coated for corrosion protection and durability |
| 3LPE Coated Pipes | Three-layer polyethylene coating for enhanced corrosion resistance |
| Internal Epoxy Coated Pipes | Epoxy lining inside for improved fluid flow and corrosion resistance |
| PE Coated Pipes | Polyethylene-coated carbon steel pipes for underground applications |
Riddhi Siddhi Impex serves a wide domestic market across India, ensuring timely supply and logistical support to major cities including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, and Jaipur. The company’s extensive distribution network enables them to deliver PP Coated Carbon Steel Pipes to industrial zones in Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Lucknow, Kanpur, and Varanasi, among others. Their warehouses and partner facilities in Gujarat and Maharashtra act as strategic stock points, ensuring fast and reliable deliveries. Whether for infrastructure projects in Thiruvananthapuram, refinery units in Dahej, or power plants in Nagpur, Riddhi Siddhi Impex provides seamless supply services nationwide..
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