Product Overview
PPH hot melt flanges are pipe fittings made from homopolymer polypropylene (PPH) with added antioxidants and UV stabilizers. They connect to the pipe via hot-melt bonding, and are then secured with flange bolts for a sealed connection. They are commonly used for fixing and connecting pipeline systems.
Common Structures
Hot-melt socket flange:
The flange neck has a socket; commonly used for small diameters DN15–DN100. It is inserted into the pipe end after heating at 230 ±5 ℃ and then cooled to form a single unit. It withstands a pressure of 1.0 MPa.
Hot-melt weld flange:
The pipe end is butt-welded to the flange opening; used for sizes DN125–DN400 and even larger. It is heated at 195–205 ℃, flanged 1 mm, and closed within 10 seconds. Its strength is ≥90% of the base material.
Loose-fitting flanges:
The flange can rotate, facilitating hole alignment; after the gasket is heat-welded to the pipe, a steel or PP flange is fitted over it and bolted in place. Suitable for narrow spaces or joints requiring frequent disassembly.
Main connection dimensions of PPH flange//connection method:hot melt socket
|
Nominal diameter DN(mm) |
Diameter OD(mm) |
Hot melt thickness S(mm) |
Outside diameter of hot melt joint D(mm) |
Hot melt inner diameter Z(mm) |
Flange thickness Si(mm) |
Outer diameter of flange D1(mm) |
Number of holes |
Aperture F(mm) |
Center hole spacing k(mm) |
Hot melt height L(mm) |
|
DN15 |
φ20 |
4.5 |
28 |
19 |
16 |
96 |
4 |
20.5-15.4 |
65 |
16 |
|
DN20 |
φ25 |
4.5 |
33 |
24 |
17 |
105 |
4 |
19.6-15 |
73 |
19 |
|
DN25 |
φ32 |
5.5 |
42 |
31 |
18 |
114 |
4-M14 |
15.5 |
85 |
25 |
|
DN32 |
φ40 |
6 |
50 |
38 |
18 |
133 |
4-M14 |
16 |
100 |
28 |
|
DN40 |
φ50 |
7 |
62 |
48 |
18 |
142 |
4-M14 |
16 |
110 |
28 |
|
DN50 |
φ63 |
7.5 |
76 |
61 |
18 |
157 |
4-M14 |
16 |
125 |
30 |
|
DN65 |
φ75 |
9 |
90 |
72 |
22 |
179 |
4-M16 |
18 |
145 |
35 |
|
DN80 |
φ90 |
10 |
108 |
88 |
24 |
190 |
8-M16 |
18 |
160 |
35 |
|
DN100 |
φ110 |
11 |
129 |
107 |
24 |
214 |
8-M16 |
18 |
180 |
38 |
Main connection dimensions of PPH flange//connection method:ordinary socket
|
Nominal diameter DN(mm) |
Diameter OD(mm) |
Hot melt thickness S(mm) |
Outside diameter of hot melt joint D(mm) |
Hot melt inner diameter Z(mm) |
Flange thickness Si(mm) |
Outer diameter of flange D1(mm) |
Number of holes |
Aperture F(mm) |
Center hole spacing k(mm) |
Hot melt height L(mm) |
|
DN25 |
φ32 |
7.5 |
48 |
33 |
18 |
114 |
4-M12 |
14 |
85 |
30 |
|
DN32 |
φ40 |
4 |
50 |
42 |
18 |
135 |
4-M16 |
18 |
100 |
30 |
|
DN40 |
φ50 |
62 |
51 |
18 |
144 |
4-M16 |
18 |
110 |
30 |
|
|
DN50 |
φ63 |
5.5 |
76 |
65 |
20 |
157 |
4-M16 |
18 |
125 |
32 |
|
DN65 |
φ75 |
7.5 |
90 |
75 |
22 |
177 |
4-M16 |
18 |
145 |
35 |
|
DN80 |
φ90 |
8.5 |
109 |
92 |
24 |
193 |
8-M16 |
18 |
160 |
37 |
|
DN100 |
φ110 |
8.5 |
129 |
112 |
24 |
214 |
8-M16 |
18 |
180 |
38 |
|
φ125 |
6.5 |
140 |
127 |
24 |
215 |
8-M16 |
18 |
180 |
38 |
|
|
DN125 |
φ140 |
11.5 |
165 |
142 |
26 |
245 |
8-M16 |
18 |
210 |
40 |
|
DN150 |
φ160 |
12 |
186 |
162 |
28 |
280 |
8-M20 |
22 |
240 |
37 |
|
φ180 |
11 |
205 |
183 |
28 |
280 |
8-M20 |
22 |
240 |
45 |
|
|
DN200 |
φ200 |
10.5 |
224 |
203 |
34 |
337 |
8-M20 |
22 |
295 |
52 |
|
φ218 |
10 |
240 |
220 |
34 |
335 |
8-M20 |
22 |
295 |
38 |
|
|
φ225 |
10 |
247 |
227 |
34 |
336 |
8-M20 |
22 |
295 |
38 |
|
|
DN250 |
φ250 |
10 |
274 |
254 |
35 |
390 |
8-M20 |
22 |
350 |
48 |
|
φ280 |
10 |
303 |
283 |
35 |
390 |
12-M20 |
22 |
350 |
48 |
|
|
DN300 |
φ315 |
10.5 |
340 |
319 |
40 |
440 |
12-M20 |
22 |
400 |
47 |
|
DN350 |
φ355 |
16 |
390 |
358 |
46 |
500 |
16-M20 |
22 |
460 |
64 |
|
DN400 |
φ400 |
15.5 |
437 |
406 |
50 |
565 |
16-M24 |
26 |
513 |
62 |
|
DN450 |
φ450 |
15 |
485 |
455 |
50 |
613 |
20-M24 |
26 |
563 |
64 |
|
DN500 |
φ500 |
21 |
546 |
504 |
47 |
667 |
20-M24 |
26 |
614 |
65 |
|
DN600 |
φ630 |
21 |
676 |
634 |
45 |
777 |
20-M27 |
30 |
722 |
65 |
Applications
- Lithium battery and new energy sector: Precise adaptation ensures efficient delivery.
- Pharmaceutical sector: Safe and clean, safeguarding health.
- Textile, dyeing, and wastewater treatment sector: Corrosion-resistant and anti-aging, protecting the aquatic environment.
- Industrial waste gas treatment and building ventilation systems sector: Purifying the air and improving quality of life.
- Mining and metallurgy sector: Adapting to harsh conditions, ensuring continuous production.
Selection Considerations
Nominal diameter:
Must match the pipe size.
01
Pressure rating:
Must meet the system design pressure.
02
High market shareFlange standard:
Confirm the flange's applicable standard to ensure the bolt hole spacing and sealing surface dimensions match the mating flange.
03
Sealing surface type:
The most common is RF (raised face), with a raised annular surface on the sealing surface.
04
Material confirmation:
Ensure it is made from pure PPH raw materials to guarantee its temperature and corrosion resistance. Some inferior products use ordinary PP to imitate it, and the performance difference is huge.
05
Choosing us means choosing a professional manufacturing partner for PPH hot melt flange.
Hot Tags: pph hot melt flange, China pph hot melt flange manufacturers, suppliers, factory, PPH Threaded Joint, PPH Hot Melt Flange, PPH Welding Flange, PPH Backing Ring, PPH Blind Plate, pipe fitting
