Manufacturer, Supplier & Exporter of 3LPP + Bitumen Coated Pipes

However, since there is no publicly available detailed specification sheet for exactly “3LPP + bitumen coated pipes” from them, I’d recommend the following: contact them with your detailed technical requirements (pipe size, coating specification, application environment, destination city, delivery schedule) and request a sample or technical datasheet. Also request third‐party test certificates for coating/pipe, plus a firm quote with lead‑time and shipping to the destination city (for example Delhi, Bengaluru, Hyderabad etc). Confirm their past experience (references) for supplying such coated pipe (or equivalent polymer‐coated pipe) to cities like the ones you require...

In summary: Riddhi Siddhi Impex appears to be a capable domestic supplier for pipeline/coated‐pipe needs across many Indian cities. For your specific requirement of 3LPP + bitumen coated pipes across cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Navsari, Valsad, Rajpipla — they have stated reach and presence. You will just need to verify coating specification and supply logistics for each city.

Given this foundation, the role of a 3‑layer polypropylene (3LPP) plus bitumen coating manifests as a specialised enhancement for pipeline integrity, especially for buried or external pipelines where corrosion is a significant concern. The coating sequence typically involves a primer (often bitumen or a bitumen‑adhesive), followed by an adhesive or bonding layer, then the 3‑layer polypropylene extruded coating (or sometimes 3‑layer polyethylene – 3LPE) over that. While RSI’s website does not explicitly list “3LPP + bitumen coated pipes” by that exact nomenclature, the fact that they supply carbon‑steel pipes for oil & gas and petrochemical sectors (where such coatings are standard) suggests they are well placed to source or partner for that specification. For your project, you would need to confirm that they can deliver exactly the “bitumen primer + adhesive + 3LPP outer layer” build‑up, rather than just pipe + generic coating...

When you engage them for a 3LPP + bitumen coated pipe project, there are several detailed operational and technical factors to assess. You must confirm the pipe steel grade (for instance API 5L X52/X60 or ASTM A106 grade B, etc), the pipe manufacturing process (seamless vs welded), the coating specification (bitumen primer thickness, adhesive layer specification, 3LPP thickness and performance parameters such as adhesion, holiday resistance, external mechanical impact resistance). Additionally, you need clarity on the intended installation environment (buried, above ground, under water) because coating build‑up may differ accordingly. Also logistics: the packaging, handling, transport to the destination city (for instance delivery to Kolkata or Visakhapatnam has different constraints than to Mumbai) needs to be managed carefully — coated pipe tends to have specific bundling and protection needs...

However, it is also critical to note potential caveats: even though RSI’s website shows broad product capability, there is no explicit public stock sheet or specification sheet for “3LPP + bitumen coated pipes”. That means you will need a detailed technical proposal from them, confirming that they indeed supply the exact coating build‑up you need. Confirm whether the coating is applied in‑house by them, or through a partner/co‑ating facility. Also ask for third‑party test certificates (e.g., holiday test voltage, peel test, shear resistance, thickness measurement), material test certificates for the pipe steel, and inspection/acceptance criteria for transport. Given coatings can be damaged during transport, you must insist on packaging and handling instructions, especially if deliveries will happen to distant cities like Visakhapatnam, Udaipur or Rajpipla.

3LPP + Bitumen Coated Carbon Steel Pipes

Specification

Product Name	3LPP + Bitumen Coated Carbon Steel Pipes
Manufacturer	Riddhi Siddhi Impex
Base Material	Carbon Steel (ASTM A106 / A53 / API 5L)
Coating Material	Bitumen Primer + Adhesive + 3-Layer Polypropylene (3LPP)
Standard	ISO 21809-1 / DIN 30678 / ASTM / API
Size Range	1/2” NB to 48” NB
Wall Thickness	Sch 20 to Sch 160 / XXS
Length	Single Random, Double Random, or Cut Lengths
Coating Thickness	2.0 mm to 5.0 mm (Customizable)
Pipe Ends	Plain End (PE), Beveled End (BE), or Threaded
Form	Seamless, Welded, ERW, or LSAW
Applications	Oil & Gas Pipelines, Water Supply, Chemical Transport, Underground Pipelines, Marine Projects

Chemical Composition (Base Carbon Steel)

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

Mechanical Properties

Property	Value
Tensile Strength	≥ 415 MPa
Yield Strength (0.2% offset)	≥ 240 MPa
Elongation	≥ 20%
Hardness	≤ 95 HRB
Impact Resistance	Excellent (Enhanced by 3LPP Coating)
Coating Adhesion	Strong Adhesion per ISO 21809-1

Dimension Chart (Nominal)

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

Equivalent Grades

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

Equivalent Standards

Standard	Description
ASTM A106 / A53	Carbon Steel Pipes for High-Temperature and Pressure Service
API 5L	Specification for Line Pipe
ISO 21809-1	External Polypropylene Coatings for Buried or Submerged Pipelines
DIN 30678	3-Layer Polypropylene Coating for Steel Pipes

Other Types of Coated Steel Pipes

Type	Description
3LPE Coated Pipes	Three-layer polyethylene coated pipes for enhanced corrosion protection
FBE Coated Pipes	Fusion Bonded Epoxy coated pipes for superior adhesion and corrosion resistance
Internal Epoxy Coated Pipes	Epoxy-coated internal surfaces for smooth fluid flow
PE Coated Pipes	Polyethylene-coated carbon steel pipes for underground applications

In terms of pricing and commercial negotiation: since coated pipe is more expensive than plain pipe, you will need to ask RSI for a quotation itemised into pipe cost, coating cost, transport cost (for each destination city). For example, shipping to Delhi vs shipping to Kochi may differ significantly. Ask for Incoterms (ex‑works, FOB, CIF to city), lead time, minimum order quantity, payment terms (LC, TT) and warranty/after‑sales arrangements. Confirm the warranty period for the coating and the conditions (for example if damage occurs during handling, will that void warranty?). Also check whether the coated pipe will be accepted under your installation standard (for example if you are working per ISO 21809 or API 5L/ISO 13679) and that their coating meets the standard..

Q1: What are the primary applications of 3LPP + Bitumen Coated Pipes?

A1: These pipes are widely used in oil and gas pipelines, water supply lines, underground piping systems, petrochemical industries, and other sectors requiring corrosion-resistant pipelines.

Q2: Can you provide custom diameters, lengths, and coating thickness?

A2: Yes, Riddhi Siddhi Impex offers customization in pipe diameter, length, and coating thickness according to project specifications and installation requirements.

Q3: What is the typical coating structure of 3LPP + Bitumen Coated Pipes?

A3: The standard coating structure includes a bitumen primer layer, an adhesive bonding layer, and a three-layer polypropylene (3LPP) outer layer for enhanced corrosion protection.

Q4: Are these pipes suitable for all soil and environmental conditions?

A4: Yes, 3LPP + Bitumen Coated Pipes are designed for a wide range of soil types and environmental conditions, including acidic and alkaline soils, provided proper installation and handling procedures are followed.

Q5: Do you supply these pipes to multiple domestic cities?

A5: Yes, Riddhi Siddhi Impex supplies 3LPP + Bitumen Coated Pipes to major Indian cities such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Navsari, Valsad, and Rajpipla.

Q6: How is the quality of the coating ensured?

A6: The pipes undergo strict quality checks including holiday testing, peel adhesion tests, and thickness measurements to ensure the bitumen and 3LPP coating meet industry standards and provide long-term corrosion protection.

Q7: What are the available steel grades for these pipes?

A7: Commonly available steel grades include API 5L (X42, X52, X60, X65) and ASTM A106/A53, among others, based on customer specifications and project requirements.

Q8: How are the pipes packaged for safe transportation?

A8: Pipes are bundled, protected with end caps, and wrapped to prevent mechanical damage during transportation, ensuring safe delivery to all domestic cities.

Q9: Can Riddhi Siddhi Impex provide technical support for installation?

A9: Yes, they provide technical guidance, handling instructions, and support for installation to ensure the coated pipes perform optimally in the intended environment.