Manufacturer, Supplier & Exporter of Expansion Pump Connectors

Expansion Pump Connectors are vital components used in piping and pump systems to absorb vibrations, thermal expansion, and mechanical stress. These connectors play a crucial role in ensuring smooth operation and safety by minimizing the impact of pressure fluctuations, movement, and misalignments. Typically made from stainless steel, rubber, or metal bellows, they are widely used in industries like oil & gas, chemical processing, HVAC, and water treatment plants.

Riddhi Siddhi Impex, based in Mumbai, India, is a reputed manufacturer and supplier of metal-based industrial components, including pipe fittings, flanges, sheets, and coils. Known for their quality and adherence to international standards, they have a strong presence in both domestic and global markets. Although their primary product portfolio includes reducers, flanges, and pipes, they may also offer customized Expansion Pump Connectors or compatible fittings as per client specifications.

Their manufacturing units in Mumbai and supply network across India enable them to cater to a broad domestic customer base. As a leading Expansion Pump Connectors domestic supplier, Riddhi Siddhi Impex is well-positioned to supply across major Indian cities, including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, and Kolkata, supporting infrastructure and industrial projects with timely delivery and technical support.

In Western India, cities like Pune, Ahmedabad, Vadodara, Rajkot, Surat, and Ankleshwar are key hubs for industrial equipment supply. Riddhi Siddhi Impex’s physical presence in Mumbai and Vadodara makes it convenient for them to serve these regions efficiently. Their partnerships with logistics providers further enhance their domestic distribution capabilities.

In Southern India, Riddhi Siddhi Impex supplies to cities like Mysuru (Mysore), Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, and Bengaluru, which are growing rapidly in industrial capacity. Their connectors and related metal fittings are suitable for water supply, chemical processing, and mechanical pump installations in these regions.

Expansion Pump Connectors – Specification Sheet

1. Chemical Composition

Grade	C (%)	Mn (%)	P (%)	S (%)	Cr (%)	Ni (%)	Mo (%)	Remarks
SS304 / 1.4301	≤ 0.08	2.00 max	0.045 max	0.030 max	18.0 – 20.0	8.0 – 11.0	–	General purpose stainless steel
SS316L / 1.4404	≤ 0.03	2.00 max	0.045 max	0.030 max	16.0 – 18.0	10.0 – 14.0	2.0 – 3.0	Better corrosion resistance; lower carbon content
SS321 / 1.4541	≤ 0.08	2.00 max	0.045 max	0.030 max	17.0 – 19.0	9.0 – 13.0	–	Stabilized with Ti for high temperature resistance

2. Mechanical Properties

Grade	Yield Strength (0.2% offset)	Tensile Strength	Elongation (%)	Hardness (HB / HRB)	Max Service Temperature
SS304	≥ 205 MPa	515 – 720 MPa	≥ 40%	≤ 92 HRB approx.	≈ 250‑300 °C (for continuous service)
SS316L	≥ 170 MPa	515 – 700 MPa	≥ 40%	≈ 79‑90 HRB	≈ 300‑350 °C (depending on media)
SS321	≈ 205 MPa	515 – 720 MPa	≥ 35%	Similar to SS304	Up to 500 °C (better use at elevated T due to stabilization)

3. Dimension Chart / Size & Pressure Ratings

Nominal Size (DN / ″)	Length (L) Typical (mm)	Max Working Pressure @ 20 °C	Max Working Pressure @ Elevated Temp (≈ 120‑150 °C)
DN25 / 1″	150	16 bar	10–12 bar
DN50 / 2″	200	16 bar	10‑12 bar
DN80 / 3″	250	16 bar	10‑12 bar
DN100 / 4″	300	16 bar	10‑12 bar
DN150 / 6″	400	10‑16 bar	7‑10 bar

4. Equivalent Grades & Equivalent Standards

Grade / Material	Equivalent Grade(s)	Applicable Standards
SS304	AISI 304, UNS S30400, EN 1.4301, DIN X5CrNi18‑10	ASTM A240, ASME SA240, EN 10088‑2, DIN 17440
SS316L	AISI 316L, UNS S31603, EN 1.4404, DIN X2CrNiMo17‑12‑2	ASTM A240, ASME SA240, EN 10088‑2, DIN 17441
SS321	AISI 321, UNS S32100, EN 1.4541, DIN X6CrNiTi18‑10	ASTM A240, ASME SA240, EN 10088‑2

5. Other Types / Variants

Type	Material / Construction	End Connection / Fittings	Special Features
Stainless steel corrugated hose with braid	SS304, SS316L, SS321	Flange‑to‑Flange, Flange‑to‑Threaded, Threaded‑to‑Threaded	Good flexibility, absorbs vibration, reduces noise, compensates misalignment
Metal bellows expansion connector	SS316, Inconel, alloyed steels	Welded ends, flange ends	High temperature / pressure, more cycles, longer life
Rubber expansion joint / flexible grooved connector	EPDM, NBR, PTFE lining	Flange, grooved, tapped ends	Better for damping, lower cost, moderate temp/pressure

Riddhi Siddhi Impex’s commitment to quality, customization, and on-time delivery makes them a trusted Expansion Pump Connectors domestic supplier. Their products are manufactured using premium raw materials and tested for durability, making them suitable for demanding environments. With continual investment in infrastructure and logistics, the company is well-equipped to meet rising demand across India.

Frequently Asked Questions (FAQs)

Q1: What is the maximum temperature an SS304 pump connector can sustain?

A: Typically around 250–300 °C for intermittent service; continuous service depends on application, media, and thickness.

Q2: How do I choose between SS304 and SS316L connectors?

A: Choose SS316L if the environment is corrosive (chlorides, acids) or where lower carbon content is needed to avoid sensitization; SS304 is suitable for general non-severe environments.

Q3: What size connector should I pick?

A: Choose nominal diameter matching pump or piping, with adequate length to allow movement; ensure pressure rating suitable for maximum operating pressure at design temperature.

Q4: Can flexible connectors / bellows be used in steam applications?

A: Yes, but ensure the material grade, end connections, and construction are rated for steam temperature and pressure; consider thermal expansion and fatigue from cycling.