Manufacturer, Supplier & Exporter of Carbon Steel Threaded Bushin

A carbon steel threaded bushing (also called a threaded bushing or threaded reducer) is a forged or machined fitting used to connect pipes or fittings of different thread sizes by providing internal and external threads. The bushing typically has male external threads and female internal threads (or vice versa), allowing a change in thread size within a piping or fitting assembly. Because of its robust mechanical strength and decent corrosion resistance, carbon steel is a widely used material for bushings in industrial, oil & gas, petrochemical, plumbing, and mechanical systems...

Carbon steel, as an iron–carbon alloy, offers good mechanical strength, toughness, and cost-effectiveness compared to many alloy steels or stainless steels. Depending on the carbon content and the presence of trace alloying elements, different grades (low, medium, high carbon) are used. The chosen grade must withstand the internal pressure, temperature, and environmental conditions (e.g. corrosion, erosion) of the application. Threaded bushings made from carbon steel are typically subjected to machining, threading, forging, heat treatment, and finishing processes to ensure dimensional precision, thread integrity, and surface finish.

Carbon Steel Threaded Bushings are known for their strength, corrosion resistance (especially when coated), and ease of installation. Their threaded design eliminates the need for welding, making them ideal for systems where welding may not be feasible. These bushings are often manufactured to standards like ASME B16.11 and ASTM A105, ensuring quality, dimensional accuracy, and compatibility with a range of piping systems..

Riddhi Siddhi Impex, based in Mumbai, is a leading manufacturer, stockist, and exporter of various industrial metal products including flanges, fittings, fasteners, and pipes. The company specializes in carbon steel and alloy steel components. While their primary catalog includes forged fittings and flanges, they also manufacture and supply Carbon Steel Threaded Bushings upon request. With advanced infrastructure and skilled workforce, Riddhi Siddhi Impex ensures that every fitting meets industry standards and customer specifications..

Riddhi Siddhi Impex is known for maintaining strict quality control measures across all stages of manufacturing—from raw material selection to final inspection. They offer Carbon Steel Threaded Bushings in a variety of thread types like NPT, BSP, BSPT, and in sizes ranging from 1/8” to 4”. The company also caters to custom requirements depending on the industry needs, providing bushings with special threading, pressure ratings, and coatings for corrosion resistance..

Carbon Steel Threaded Bushing — Specification Sheet

1. Specification Overview

Attribute	Detail / Value
Material / Grade	Carbon Steel, commonly ASTM A105 (or A105N), also A350 LF2 for low‑temperature service
Standards / Codes	ASME B16.11 (for threaded & socket welded forged fittings), MSS SP‑79 / SP‑83 / SP‑95, BS 3799
Size Range (Nominal)	1/8″ to 4″ (NPS) for threaded types (sometimes up to 6″ in some catalogs) :contentReference[oaicite:0]{index=0}
Pressure Class / Ratings	Class 2000, 3000, 6000 (in threaded types) per ASME B16.11 :contentReference[oaicite:1]{index=1}
Thread Type / Standard	NPT, BSPT, BSPP, PT, ISO threads as per ASME B1.20.1 (for NPT) or equivalent standard :contentReference[oaicite:2]{index=2}
Finish / Coating	Black / painted / galvanizing / anti‑rust coating as per customer needs
Testing & Certification	MTC (EN 10204 3.1), chemical & mechanical test reports, third‑party inspection optional

2. Chemical Composition

Element	Typical / Max % (ASTM A105 forged carbon steel)
Carbon (C)	≤ 0.35 % :contentReference[oaicite:3]{index=3}
Manganese (Mn)	0.60 – 1.05 % :contentReference[oaicite:4]{index=4}
Phosphorus (P)	≤ 0.035 % :contentReference[oaicite:5]{index=5}
Sulfur (S)	≤ 0.040 % :contentReference[oaicite:6]{index=6}
Silicon (Si)	0.10 – 0.35 % :contentReference[oaicite:7]{index=7}
Copper (Cu)	≤ 0.40 % :contentReference[oaicite:8]{index=8}
Nickel (Ni)	≤ 0.40 % :contentReference[oaicite:9]{index=9}
Chromium (Cr)	≤ 0.30 % :contentReference[oaicite:10]{index=10}
Molybdenum (Mo)	≤ 0.12 % :contentReference[oaicite:11]{index=11}
Vanadium (V)	≤ 0.08 % :contentReference[oaicite:12]{index=12}

3. Mechanical Properties

Property	Minimum / Typical Value
Tensile Strength (Ultimate)	≥ 70,000 psi (≈ 485 MPa) :contentReference[oaicite:13]{index=13}
Yield Strength (0.2% offset)	≥ 36,000 psi (≈ 250 MPa) :contentReference[oaicite:14]{index=14}
Elongation (in 2 in / 50 mm gauge)	≥ 22 % :contentReference[oaicite:15]{index=15}
Reduction of Area	≥ 30 % :contentReference[oaicite:16]{index=16}
Hardness (Brinell)	Max ~ 187 HB :contentReference[oaicite:17]{index=17}

4. Dimension Chart (Typical Hex Head Threaded Bushing per ASME B16.11)

Nominal Size (NPS)	Dimension A (Length)	Hex Height G (Min)	Hex Width Flats F (Nominal)
1/8″	10 mm (min)	–	11 mm :contentReference[oaicite:18]{index=18}

5. Equivalent Grades & Standards

Common Grade / Standard	Equivalent / Alternate
ASTM A105 / A105N	Forged carbon steel for piping; common in ASME B16.11 fittings
A350 LF2 / LF3	Low temperature carbon steel, for colder service
BS 3799	British standard for steel pipe fittings (screwed & SW)
MSS SP‑79 / SP‑83 / SP‑95 / SP‑97	Standards for forged threaded / socket weld fittings in process piping
ASME B16.11	Dimensional, tolerances, pressure ratings, thread & socket welded fittings standard
ANSI/ASME B1.20.1	Standard for NPT (tapered pipe thread)

6. Other Types / Variants

• Hex Head Threaded Bushing (common style) — external hex flats for wrenching
• Flush / Full‑face Bushing (no hex projection)
• Reducing Bushing (to reduce thread size internally)
• Male Threaded / Female Threaded in different combinations
• Threaded Socket or Tubing Bushing
• Special Coated / Surface treated bushings (galvanized, black, plated)

The company also supplies to southern cities including Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, and Mangalore. In these regions, Riddhi Siddhi Impex supports sectors like shipbuilding, food processing, textile, and engineering. The company ensures that these regions have access to high-quality Carbon Steel Threaded Bushings, even in demanding environmental conditions..

Frequently Asked Questions (FAQs)

Q1: What are the common applications of Carbon Steel Threaded Bushing?

A1: Carbon Steel Threaded Bushings are commonly used in pipelines, oil & gas systems, petrochemical plants, refineries, power generation, water treatment systems, and HVAC applications where threaded connections are required.

Q2: Can Carbon Steel Threaded Bushings be customized?

A2: Yes, customizations are available in terms of size, thread type (NPT, BSP, BSPT), pressure ratings (Class 2000/3000/6000), and surface coatings (black, galvanized, anti-rust) as per project requirements.

Q3: Are Carbon Steel Threaded Bushings corrosion-resistant?

A3: Carbon steel bushings offer basic corrosion resistance but are generally coated or painted for enhanced protection. For highly corrosive environments, stainless steel or coated versions are recommended.

Q4: What standards are followed for manufacturing Carbon Steel Threaded Bushings?

A4: These bushings are manufactured in accordance with ASME B16.11, MSS SP-79, SP-95, and material standards such as ASTM A105 or A350 LF2 for low-temperature service.