Industrial Metal Bellows Compensator DN50 to DN1000 High Pressure Vacuum Resistant

Product Description

Product Description

Overview of Metal Bellows Expansion Joint

Our Metal Bellows Expansion Joints are engineered to absorb thermal expansion, vibration, and misalignment in piping systems. Constructed with high-grade Multi-ply Stainless Steel (SS304/SS316) bellows and robust carbon steel or stainless steel flanges, these compensators ensure the safety and longevity of your pipelines.
Whether for water treatment, district heating, petrochemical, or exhaust systems, our expansion joints offer superior flexibility and high-pressure resistance. We support standard specifications (DN32-DN2000) and fully customized designs including Tied, Hinged, and Pressure Balanced types.

Key Features & Advantages

High Flexibility: Effectively compensates for axial, lateral, and angular movements.
Corrosion Resistance: Multi-ply stainless steel bellows ensure long service life in harsh environments.
Vibration Damping: Reduces noise and vibration transmission, protecting expensive pumps and valves.
Strict Quality Control: 100% Hydrostatic testing and leakage testing before shipment.
Customization: We offer tailored solutions for length, pressure, and material based on your drawings.

Product Details

Product Name	Stainless Steel Metal Bellows Expansion Joint / Compensator
Nominal Diameter	DN15 - DN3000
Working Pressure	PN10, PN16, PN25, PN40, PN64 (ANSI 150LB, 300LB available)
Bellows Material	Stainless Steel 304, 304L, 316, 316L, 321
Flange/End Material	Carbon Steel (Q235, A105) or Stainless Steel
Connection Type	Flange (ANSI, DIN, JIS, BS standard) or Welding Ends
Temperature Range	-196°C to +600°C
Applicable Medium	Water, Steam, Oil, Gas, Acid, Alkali, etc.
Design Standard	EJMA, ASME, GB/T 12777
HS Code	8307100000

Specification

1. Standard Size Range (DN32 - DN2000+):
We offer a full range of sizes. The prices listed above (for DN100, DN200, DN300, DN500) are based on our Standard Configuration:
Bellows Material: Stainless Steel 304 (Multi-ply)
Flange Material: Carbon Steel (RST37.2 / Q235)
Pressure Rating: PN10 / PN16
Length: Standard Length

2. Customized Size:
For the item listed as "Customized Size", please note that the price is negotiable.
Since expansion joints are highly customizable products, the final price depends on:
Specific Diameter (e.g., DN800, DN1200, or non-standard sizes).
Material Requirements (Full SS304, SS316L, Duplex Steel, etc.).
Structure (With Tie Rods, Hinged, Pressure Balanced).
Please contact us with your requirements or drawings, and we will offer you a precise quote within 24 hours.

Specification	Price
DN100	$45.00
DN200	$95.00
DN300	$165.00
DN500	$380.00
Customization	Negotiable

Application

Power Plant Use

Petrochemical Systems

Cryogenic Applications

Steam & Hot Water Lines
Handles thermal expansion in boiler-to-turbine steam lines and hot water circuits. Resists 800°C+ heat, high pressure, and vibration — critical for plant safety and uptime.

Oil, Gas & Chemical Transfer
Used in refineries and reactors to absorb movement from high-pressure oil/gas flow. Corrosion-resistant stainless steel ensures reliability in aggressive chemical environments.

LNG & Liquid Gas Pipelines
Compensates contraction at -196°C in LNG, liquid nitrogen or oxygen systems. Maintains leak-free seal under extreme cold — vital for cryo storage and transport.

Production Showcase

After Sales Service

12-Months Quality Warranty: We offer a one-year warranty from the date of product receipt. If any manufacturing defects occur during this period, we will provide free replacement or repair parts immediately.
Technical Support: Installing expansion joints correctly is critical. We provide detailed installation manuals and video guidance to ensure your onsite team installs the bellows correctly to avoid damage.
24/7 Response: Our sales and engineering team is available online. Any technical questions or claims will be responded to within 24 hours.
Third-Party Inspection: We accept inspections from SGS, BV, or TUV before shipment to ensure you receive exactly what you ordered.

Our Company

Company Profile

Shanghai Baori Steel Industries Co., Ltd, has established its significant 
presence in the metal manufacturing and fabrication industries. Since its 
establishment on Aug 03, 2023, the company has 
been committed to providing comprehensive and efficient 
fabrication solutions, focusing on the integration 
and optimization of steel supply services.

Company Address

Our company is located in Baoshan District, Shanghai, China.
Specific Location:

Room 403, Building 1, Lane 1588, Youyi Road, Baoshan District, Shanghai, China 

FAQ

Q: Can you manufacture according to my drawing or specific requirements?
A: Yes, absolutely. We support OEM and ODM. Since expansion joints are highly customized products, we can manufacture them exactly according to your drawings, or design a solution based on your pipeline parameters.

Q: What information should I provide to get a precise quotation?
A: To give you the best price, please kindly provide the following details: Size (DN), Pressure Rating (PN), Material, and Connection Type.

Q: Do you inspect the products before shipping?
A: Yes, Quality is our culture. Every single expansion joint undergoes 100% Hydrostatic Testing (Water Pressure Test) and visual inspection before packaging to ensure zero leakage and safety.

Q: Can I get a sample to check the quality?
A: Yes, we can provide a standard size sample (e.g., DN100) for your evaluation. For large-size customized products, we can provide detailed production photos and videos.

Q: What certificates do you provide?
A: We provide the Mill Test Certificate (MTC), Material Certificate, and Hydro Test Report along with the shipment. Third-party inspection (like SGS/BV) is also acceptable upon request.