Zhejiang Daye Flange Co., Ltd. is one of the leading manufacturers and suppliers of ss 304l lap joint flange in China. With abundant experience, we are committed to providing high quality flanges made in China with competitive price. We warmly welcome you to buy durable ss 304l lap joint flange in stock here from our factory. Also, quotation is available.
Loose flanges are mainly divided into two types: plate loose flanges and lap joint flanges.Both are movable flange types used in industrial piping systems. They require no welding on the flange itself and facilitate easy installation.
The differences between the two are listed below:
Plate Loose Flange,Consists of two components: flange plate and loose ring. Applicable standards include EN1092-1 Type02/04, DIN2642, etc. The flange plate resembles a plate flat welding flange. Instead of welding the flange to the pipe, the loose ring is welded to the pipe. The flange plate can slide freely along the pipe and does not come into contact with the medium inside the pipe.
Lap Joint Flange,Composed of a flange plate and a stub end. The flange plate features a short hub,. Its application method is similar to that of the plate loose flange, yet it delivers superior sealing performance.
In terms of material selection, SS 304L lap joint flanges and loose plate flanges are the most widely adopted options. Our SS 304L lap joint flanges are manufactured from premium 304L raw material with stable properties to enhance operational efficiency.
Parameters
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Standard: |
ASME B16.5, DIN EN 1092-1, GOST 33259, JIS B2220,AWWA-C207, MSS SP-44, Customization |
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Certifications: |
PED/CE, ISO9001, ISO 45001, ISO14001 |
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Size: |
1/2"-160"/Dn10-Dn4000 |
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Rating: |
Class150-Class2500/Pn10-Pn40 |
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Material: |
Stainless steel: 304/304L, 316/316L, 321, 316Ti, 347/347H, 310S Super stainless steel: 254SMO/F44, 904L Duplex steel: F51/2205, F53/2507 Special alloy steel:Inconel(625, 600, 718, 750, 601), Hastelloy(276, C-22, C-4, C, X, B-2), Monel(400, 500), Incoloy(800, 825, 020, 028, 925),etc |
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Facing: |
RF/FF/MFM/TG |
Product Advantage
- Flexible installation
- Facilitates later maintenance and replacement
- Reduces piping stress
As the flange ismovable, it relieves stress at joints by accommodating pipe vibration as well as thermal expansion and contraction.
Applications
Connection for medium and low pressure pipelines
Large-diameter pipelines
Pipelines requiring frequent disassembly
Test
Mill certificate,100%PMI,Tensile Test,Hardness Test,Impact Test,IC Test,etc.it depends on the requirements.



Cerfitications

PED

PED

ISO 45001

ISO 9001

ISO 14001
Process





Packaging

Outer Packaging:
Fumigated wooden crates/Fumigation-free plywood crates/Customized wooden crates

Inner Packaging:
Plastic flange protectors/Bubble wrap/Cardboard/Protective paper
Packaging can be customized to meet your specific requirements.
FAQ
Q: What is the difference between loose flange and plate slip-on flange?
A: The most significant difference lies in the detachable application of loose flanges. Once a plate slip-on flange is welded, it cannot move, whereas a loose flange can be adjusted along the pipe.
Q: What is the difference between 304 lap joint flange and SS 304L lap joint flange?
A: It mainly depends on carbon content. Low-carbon grade delivers better corrosion resistance. For media with weak corrosivity, SS 304L lap joint flange is preferred.
Q: What is the MOQ?
A: We don't have MOQ,but the more quantity,the price lower.
Q: What are your payment terms?
A: Perfer TT,L/C also acceptable.
Q: What surface finish do you provide?
A: 125-150AARH/,we can also customize accoding to your requirements.
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