SS304 OD85MM ID79MM Total Length 200MM Socket Weld Flexible Bellows

This sanitary socket welded flexible bellows is made of thick-wall SS304 stainless steel with 3mm wall thickness, featuring an outer diameter of 85mm, inner diameter of 79mm and overall length of 200mm. Adopting integrated hydraulic forming corrugated structure and full metal socket weld ends without rubber gaskets, it delivers excellent pressure and vacuum resistance. The smooth inner surface leaves no dead leg, supporting full CIP online cleaning to meet food, beverage and cosmetic hygiene standards. It effectively absorbs pipeline thermal expansion, offsets assembly misalignment and dampens vibration transmitted from pumps and tanks, preventing weld cracking and stress damage to valves and instruments. Widely used in sanitary process piping systems for stable, long-term leak-free operation.

Model:
85×200MM
Brand:
Compass
Code:
032201A285-200-S

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Specification

Standard	SMS,DIN
Material Contact Parts	SS304 SS304L	Provided with material inspection report
Size	1/4"- 8", DN10 - DN200
Availabe Connection	Welding
Power Option	Manual
Internal surface finish	Ra0.4~0.6μm
External Surface Treatment	Ra0.8~1.6μm
Application	Widely Used for Alcohol, Food

Functions

1.Absorb thermal expansion and contraction of pipelines: High-temperature CIP cleaning and temperature changes of media cause thermal expansion of stainless steel pipelines. The corrugated section offsets axial displacement to prevent pipeline deformation, weld cracking and stress damage to valves.

2.Vibration and noise reduction: Buffer vibration transmitted from pumps and conveying equipment to protect manholes, butterfly valves, flow meters, filling machines and other instruments.

3.Compensate assembly deviation: Adjust minor radial and axial misalignment generated during pipeline welding and fitting, lowering construction difficulty.

4.Buffer pressure fluctuation for vacuum & pressure pipelines: Alleviate water hammer impact and stabilize pressure fluctuation on negative-pressure vacuum tanks and pressure conveying lines.

5.Sanitary fluid delivery: Smooth inner corrugation without dead zones, suitable for CIP online cleaning, no material residue and low risk of microbial breeding.

Advantages

1.Sanitary mirror polishing: SS304 / SS316L stainless steel with inner & outer surface roughness Ra ≤ 0.8μm, complying with 3-A and GMP sterile standards.

2.Convenient socket weld connection: Straight socket ends can be directly butt-welded with sanitary tubes, delivering tighter sealing than clamp-type connectors without gasket leakage risks.

3.Integrally formed corrugation with excellent pressure & vacuum resistance: Hydraulic one-piece forming enables stable performance under both positive pressure and vacuum conditions.

4.Strong corrosion resistance: Grade 316L version resists CIP acid & alkaline detergents, lactic acid from fruit juice and surfactants for daily chemical products.

5.Compact size for narrow installation spaces: Fits limited pipeline areas at tank bottoms and short equipment branches.

6.Zero risk of medium contamination: All-metal construction without rubber components that may age and precipitate impurities, ideal for high-purity pharmaceutical liquid and dairy transportation.

How to Order ?

1. Which material, such as SS316L, SS304?

2. Which size, such as 1/4"- 8", DN10 - DN200?

3. Which standard, such as DIN, SMS?

4. How long, such as 200MM?