Manufacturer, Supplier & Exporter of Flat Round Bar (Flat Bar)

Riddhi Siddhi Impex is one of the leading manufacturers, stockists, and domestic suppliers of Flat Round Bar (Flat Bar) in India, offering superior quality bars engineered to meet diverse industrial needs. Our Flat Bars are manufactured using high-grade raw materials and advanced processing technologies to ensure precision, durability, and consistent performance. These bars are available in stainless steel, carbon steel, alloy steel, duplex steel, and other special alloys, making them suitable for a wide range of applications across different sectors...

Flat Round Bars are widely demanded in engineering, fabrication, construction, and equipment manufacturing due to their excellent strength, smooth surface finish, and machinability. At Riddhi Siddhi Impex, each bar undergoes rigorous testing and inspection to ensure that it meets national and international standards, including ASTM, ASME, EN, DIN, and IS specifications. Our commitment to delivering premium-quality material at competitive prices has made us a trusted partner for clients across India.

We supply Flat Round Bars in customized sizes, widths, thicknesses, and lengths to cater to unique project requirements. Whether you need small-scale quantities for precision machining or bulk supply for large construction projects, we offer fully tailored solutions. Our advanced production setup allows us to maintain tight dimensional tolerances, superior straightness, and excellent mechanical properties in every bar..

As a major Flat Round Bar (Flat Bar) Domestic Supplier, we supply products across key industrial 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, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla, and many more industrial regions in India.

Flat Bars manufactured by Riddhi Siddhi Impex are widely used in structural fabrication due to their weldability, formability, and excellent load-bearing characteristics. Industries such as automotive, shipbuilding, petrochemical, mining, heavy machinery, and railways extensively utilize our Flat Bars for frameworks, brackets, support structures, flanges, base plates, and machine components. Their uniformity and strength make them an ideal choice for both static and dynamic load applications..

PP Coated Carbon Steel Pipes

Specification

Product Name	PP Coated Carbon Steel Pipes
Manufacturer	Riddhi Siddhi Impex
Base Material	Carbon Steel (ASTM A106 / A53 / API 5L)
Coating Material	Polypropylene (PP) – Single or 3-Layer (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	1.8 mm to 4.5 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, 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 (Due to PP 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	Standard Specification for Carbon Steel Pipe 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

Our Stainless Steel Flat Round Bars offer exceptional resistance to corrosion, chemical attack, and high-temperature environments, making them suitable for harsh conditions. Carbon steel and alloy steel Flat Bars are preferred for applications requiring high hardness, strength, and wear resistance. We ensure every product delivers maximum operational efficiency in demanding environments..

Frequently Asked Questions (FAQs)

Q1: What are the uses of Flat Round Bar (Flat Bar)?

A1: It is widely used in construction, fabrication, railways, shipbuilding, engineering, and industrial frameworks.

Q2: Do you offer custom sizes and cutting for Flat Bars?

A2: Yes, Riddhi Siddhi Impex provides customized lengths, widths, and tolerances based on client requirements.

Q3: Are Stainless Steel Flat Bars corrosion-resistant?

A3: Yes, especially grades like SS 304 and SS 316 offer excellent corrosion resistance for harsh environments.

Q4: Which finishes are available for Flat Bars?

A4: Available finishes include Hot Rolled, Cold Drawn, Polished, Bright Finish, and Custom Finishes.