Stainless Steel Rubber Expansion Joint-Henan Shengrun Pipeline Equipment Co., Ltd.

Stainless Steel Rubber Expansion Joint

Flexible Connection of 304/316 Stainless Steel Flange + High-Elastic Rubber Ball
1. Flexible Compensation: Rubber elasticity absorbs axial ±10–20mm, lateral ±5–15mm, and angular ≤12° displacement, adapting to thermal expansion and contraction/installation deviations.
2. Vibration Reduction and Noise Reduction: Isolates water pump/equipment vibration, reducing noise by 20–30dB, protecting pipelines and valves.
3. Corrosion-Resistant Sealing: Stainless steel flange + special rubber, resistant to acids, alkalis, seawater, and oil, ensuring reliable sealing.

Core Advantages

1. Superior Corrosion Resistance: 304/316 flanges are rust-free and salt spray resistant, suitable for chemical/seawater/food-grade applications.

2. Longer Service Life: Stainless steel + weather-resistant rubber

3. Flexible Installation: The flange can be rotated, allowing installation even if misaligned, saving time and effort.

4.Excellent Vibration Reduction: High-elasticity ball, providing 30% stronger vibration reduction than carbon steel models.

Working Principle

Stainless-Steel-Rubber-Expansion-Joint-10

Flexible Compensation: Rubber elasticity absorbs axial ±10–20mm, lateral ±5–15mm, and angular ≤12° displacement, adapting to thermal expansion and contraction/installation deviations.

Vibration Reduction and Noise Reduction: Isolates water pump/equipment vibration, reducing noise by 20–30dB, protecting pipelines and valves.

Corrosion-Resistant Sealing: Stainless steel flange + special rubber, resistant to acids, alkalis, seawater, and oil, ensuring reliable sealing.

Application Scenarios

1. Chemical Piping: Pipelines for acids, alkalis, organic solvents, and corrosive media.

2. Food/Pharmaceutical: Sanitary flanges, pure water/clean water pipelines.

3. Seawater/Marine: Seawater cooling, ballast water, marine fire-fighting pipelines.

4. Wastewater Treatment: Sewage, acid and alkali wastewater, chemical dosing systems.

5. Pump Room/Machine Room: Pump inlet and outlet, locations with high vibration, and areas requiring rust prevention.

Installation Points

1. Flange Connection: Match stainless steel flanges to pipe flanges, tighten bolts diagonally and evenly.

2. Flow Direction: No directional restrictions; can be installed horizontally or vertically.

3. Pull-out Prevention: For PN≥1.6MPa or pump outlet, install a limit rod.

4. No Twisting: Axial installation; avoid radial off-center loading.

Technical Specifications

Rubber-expansion-joints-11

Project/Model	JGD-1	JGD-2	JGD-3
Working pressure MPa	1.0（10）	1.6（16）	2.5（25）
Bursting pressure MPa	2.0（20）	3.0（30）	4.5（45）
Vacuum degree Kpa	53.3（400）	86.7（650）	100（750）
Applicable temperature ℃	-15℃ to +115℃; special models can reach -30℃ to +250℃.
Applicable media	Air, compressed air, water, seawater, hot water, oil, acids and alkalis
Notes: 1. Special requirements can be customized by letter or drawing. Flanges should conform to the "National General Water Supply and Drainage Standard Drawings," and others should conform to HG/T2289-92. Production range: DN15-4000. 2. DN350-600 (2) type working pressure: 1.6MPa; DN32-400 (3) type working pressure: 2.5MPa. 3. DN700-1200 (2) type working pressure: 1.0MPa; DN1400 type working pressure: 0.6MPa; DN1600-DN1800 type working pressure: 0.4MPa; flanges selected at 0.6MPa. DN2000 type working pressure: 0.25MPa; flanges selected at 0.6MPa. 4. For suspended water supply systems using products with a diameter of DN200 or larger, the pipes must have fixed supports or brackets; otherwise, the product should be equipped with an anti-pull-out device. 5. When using rubber joints, the corresponding flanges should be valve flanges or flanges conforming to GB/T9115.1 (RF).

Nominal diameter DN		Length L (mm)	Flange thickness b (mm)	Number of bolts n	Bolt hole diameter (mm)	Bolt hole center circle diameter D1	Axial displacement elongation (mm)		Lateral displacement (mm)	Deflection angle (α₁+α₂) °
mm	inch	Length L (mm)	Flange thickness b (mm)	Number of bolts n	Bolt hole diameter (mm)	Bolt hole center circle diameter D1	elongation	compression	Lateral displacement (mm)	Deflection angle (α₁+α₂) °
32	1 1/4	95	16	4	18	100	6	9	9	15
40	1 1/2	95	18	4	18	110	6	10	9	15
50	2	105	18	4	18	125	7	10	10	15
65	2 1/2	115	20	4	18	145	7	13	11	15
80	3	135	20	4	18	160	8	15	12	15
100	4	150	22	8	18	180	10	19	13	15
125	5	165	24	8	18	210	12	19	13	15
150	6	180	24	8	23	240	12	20	14	15
200	8	210	24	8	23	295	16	25	22	15
250	10	230	26	12	23	350	16	25	22	15
300	12	245	28	12	23	400	16	25	22	15
350	14	255	28	16	23	460	16	25	22	15
400	16	255	30	16	25	515	16	25	22	15
450	18	255	30	20	25	565	16	25	22	15
500	20	255	32	20	25	620	6	25	22	15
600	24	260	36	20	30	725	6	25	22	15
700	28	260	36	24	30	840	16	25	22	15
800	32	260	38	24	34	950	16	25	22	15
900	36	260	42	28	34	1050	6	25	22	15
1000	40	260	44	28	34	1160	18	26	24	15
1200	48	260	48	32	41	1380	18	26	24	15
1400	56	350	44	36	34	1560	20	28	26	15
1600	64	350	46	40	34	1760	25	35	30	10