Manufacturer, Supplier & Exporter of Carbon Steel Threaded Cap

Carbon Steel Threaded Cap is a high-performance pipe fitting used to securely seal the end of a threaded pipe. Manufactured with robust carbon steel—typically ASTM A105 grade—it is designed to handle high-pressure, high-temperature, and corrosive environments. Riddhi Siddhi Impex, a leading manufacturer and exporter based in India, offers precision-engineered carbon steel threaded caps that meet global standards and are trusted across critical industries..

As a Carbon Steel Threaded Cap Domestic Supplier, Riddhi Siddhi Impex supplies these fittings to a wide range of industrial applications such as oil & gas, refineries, petrochemical plants, water treatment systems, marine engineering, and power generation facilities. The threaded connection allows easy installation and removal, making them especially valuable for systems that require maintenance or frequent modifications.

Every threaded cap produced by Riddhi Siddhi Impex is forged and machined to meet strict dimensional accuracy and surface finish requirements. The company follows ASME B16.11 and ASTM A105 standards for material and threading, ensuring compatibility and performance across various piping systems. Their expertise in forging and threading guarantees a tight, leak-proof seal to protect pipelines and equipment...

Riddhi Siddhi Impex not only serves the export market but also plays a vital role in India's domestic supply chain. The company is recognized as a trusted Carbon Steel Threaded Cap Domestic Supplier in metropolitan cities like Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, and Kolkata, meeting the requirements of OEMs, contractors, and plant operators with quick turnaround times and reliable logistics.

The company’s extensive distribution network also covers fast-growing industrial centers such as Pune, Ahmedabad, Surat, Vadodara, Rajkot, Indore, Bhopal, and Nagpur. In these regions, Riddhi Siddhi Impex has established long-term partnerships with EPC firms, fabricators, and maintenance contractors who require top-quality carbon steel fittings backed by material test certificates (MTCs) and traceability..

Carbon Steel Threaded Cap Specification

Specification

Property	Details
Product	Threaded Pipe Cap
Material	Carbon Steel (ASTM A105)
Type	Forged Threaded Fitting
Thread Type	NPT (National Pipe Thread)
Connection	Female Threaded End
Size Range	1/8” to 4”
Pressure Class	Class 2000, 3000, 6000
Standards	ASME B16.11, ASTM A105, ANSI B1.20.1
Applications	Oil & Gas, Power, Petrochemical, Water Treatment, Marine

Chemical Composition (%)

Element	Composition
Carbon (C)	0.35 max
Manganese (Mn)	0.60 – 1.05
Phosphorus (P)	0.035 max
Sulfur (S)	0.040 max
Silicon (Si)	0.10 – 0.35

Mechanical Properties

Property	Value
Tensile Strength	485 MPa (Min)
Yield Strength	250 MPa (Min)
Elongation	22% (Min)
Hardness	197 HB Max

Dimension Chart (Threaded Cap – ASME B16.11)

NPS (inches)	Outside Diameter (mm)	Length (mm)	Class 3000	Class 6000
1/4"	13.7	22	18	24
1/2"	21.3	25	22	30
3/4"	26.7	30	28	35
1"	33.4	35	33	40
2"	60.3	45	42	50

Equivalent Grades

Standard	Equivalent Grade
ASTM	A105
ASME	SA105
DIN	1.0460
JIS	STPG370

Equivalent Standards

Organization	Standard
ASME	B16.11
ASTM	A105
ANSI	B1.20.1
ISO	7-1

Other Types of Threaded Fittings

Fitting Type	Description
Threaded Elbow	Used to change the direction of the pipe
Threaded Tee	Used to join three pipes
Threaded Coupling	Used to join two similar pipes
Threaded Union	Used for easy disconnection
Threaded Bushing	Used to connect different-sized threads

Riddhi Siddhi Impex distinguishes itself with flexible manufacturing capabilities, customer-focused service, and stringent quality assurance. Whether you need bulk orders or small-batch production, the company delivers fittings with timely dispatch and full documentation. As a Carbon Steel Threaded Cap Domestic Supplier, they also offer custom coatings or finishes for corrosion resistance in harsh environments.

Frequently Asked Questions (FAQs)

Q1: What is a Carbon Steel Threaded Cap?

A1: It is a forged pipe fitting with female threads used to seal the end of a male-threaded pipe.

Q2: What is the pressure rating of Carbon Steel Threaded Caps?

A2: Threaded caps are available in pressure classes 2000, 3000, and 6000 depending on system requirements.

Q3: In which cities does Riddhi Siddhi Impex supply Carbon Steel Threaded Caps?

A3: Riddhi Siddhi Impex supplies across India including Mumbai, Delhi, Hyderabad, Bengaluru, Ahmedabad, Surat, Pune, and many more.

Q4: Are MTCs and third-party inspection certificates provided?

A4: Yes, Material Test Certificates and third-party inspections are available on request with every shipment.