Plate flat welding flange PL
The PL plate-type flat welding flange is a core detachable connection fitting for piping systems, mainly used for flange butt-joint connections between pipe and pipe, pipe and valve, and pipe and equipment. During construction, the steel pipe is inserted into the inner bore of the flange and fixed by welding with inner and outer fillet welds, and sealing and locking are completed with sealing gaskets and bolts and nuts. The product is suitable for normal-temperature, normal-pressure, medium- and low-pressure fluid transportation working conditions, mainly conveying media such as clean water, circulating water, air, ordinary oil products, and low-pressure gases. It is widely used for main pipeline network connections, pipeline and equipment connections, valve installation and fixation, pipeline maintenance and docking, and engineering sectional splicing. Because its structure is not suitable for high-temperature and high-pressure, alternating load, and flammable and explosive high-risk working conditions, it is specially used for diversion, connection, and sealing fixation of conventional industrial and civil pipelines, and is a common solution for low-pressure pipeline engineering.
Inquiry
- The biggest advantages of PL plate-type flat welding flanges are simple structure, extremely high cost-effectiveness, and full coverage of versatility. They are made by precision machining and turning from a whole steel plate
- the end face is flat, the perpendicularity is high, and the bolt hole positions are precise
- with zero deviation during installation and alignment. Compared with necked flanges
- the production cost is lower, supply is faster, and the cost-effectiveness advantage is obvious. Welding uses the ordinary fillet weld process
- construction is simple, the welding amount is small, and the construction period is short
Detailed Introduction
Plate Slip-On Flange (PL, Plate Slip-On Flange) belongs to steel plate slip-on flanges and is the most commonly used low-pressure flange fitting in industrial pipelines. The flange body is a flat disc structure; the pipe is directly inserted into the flange bore, and fillet welds are applied on both the inner and outer sides for fixation, without the need for beveled butt welding. The product has a simple production process, low processing cost, and short delivery cycle, and is widely used in medium and low pressure working conditions. It implements the standards GB/T9119, HG/T20592 European standard PN system; the American standard rarely uses PL plate slip-on flanges, and the American standard mostly uses SO hubbed slip-on flanges. The mainstream sealing face is RF raised face. Materials include carbon steel, stainless steel, and alloy steel; pressure ratings are PN6-PN40, and it is not suitable for high-temperature, high-pressure, alternating load, or flammable and explosive high-risk pipelines. It is mostly used for water supply and drainage, fire protection, ordinary heating, and ordinary chemical low-pressure pipelines. The flange bolt holes are evenly distributed according to the standard, and matching gaskets, bolts, and nuts enable detachable pipeline connections.
- Simple structure, low cost, short delivery cycle, high cost-effectiveness
- Convenient installation, using fillet welding, no beveling required, and ordinary welders can operate it
- Diverse materials: carbon steel, stainless steel, alloy steel, adapting to different media
- Pressure ratings PN6-PN40, covering conventional medium and low pressure working conditions
- Supports non-standard customization and OEM contract manufacturing, and can customize large diameters and special materials
- Two-year warranty, lifetime technical support, worry-free after-sales service
| Product Name | Plate Flat Welding Flange PL |
| Product Categories | Contact Us to Confirm |
| Customization | This factory has mature capabilities for non-standard customization and OEM contract manufacturing of PL plate slip-on flanges, and can meet various differentiated engineering needs. It supports custom processing of large-diameter and oversized dimensions, special thickened thicknesses, non-standard pressure ratings, and special hole spacing flanges. It can customize special materials such as carbon steel, stainless steel, and alloy steel, adapting to corrosion-resistant and low-temperature working conditions. It supports customization of FF full-face, special sealing faces, and non-standard bolt hole spacing. It can perform mold opening, processing, and production according to non-standard drawings of German standards, Japanese standards, and American standards. It supports laser marking of LOGO, batch number, specifications, and standard OEM branding, and can customize special anti-rust packaging for foreign trade and engineering supporting documents. The customization process is mature, processing precision is high, and the qualification rate is 100%, and it can undertake various non-standard and high-end customized orders at home and abroad. |
| MOQ | Our factory's PL plate flat welding flanges support an ultra-flexible minimum order mode, adapting to all procurement volume needs. Regular in-stock specifications have a minimum order of 1 piece, supporting scattered replenishment at construction sites, maintenance and renovation, sample submission for inspection, and small-area pipe network construction procurement, with no minimum order threshold whatsoever. Regular engineering bulk procurement has an MOQ of 50 pieces, enjoying tiered wholesale discount prices. Regular MOQ for foreign trade export is |
| Lead Time | Our factory has fully automated production lines for steel plate cutting, CNC turning, and end-face finishing, with ample production capacity and stable, efficient delivery times. Market-popular DN15-DN600, PN10/PN16 regular in-stock specifications are shipped out from the warehouse within 24 hours at extreme speed, meeting the needs of urgent material replenishment at construction sites and rush schedules. Medium and large diameter DN700-DN1200 regular specifications take 3-5 working |
| Packaging | PL plate flat welding flanges use engineering-grade standardized protective packaging, suitable for domestic land transportation and international sea export. Small-diameter flanges are treated with anti-rust oil spraying, wrapped individually with protective film, preventing rust, scratches, and collision damage. Small and medium specifications are neatly packed into thickened hard cardboard boxes, with categories labeled by specification, pressure, material, and standard, eliminating mixed loading and confusion. Large-diameter flanges are wrapped in multiple layers of waterproof stretch film, straw rope, and woven bags, fixed and reinforced on solid wood pallets, preventing transportation deformation and end-face wear. Each batch is accompanied by a product certificate of conformity, factory inspection report, and material certificate. The outer packaging clearly labels model, specification, weight, batch number, and place of origin information. Overall moisture-proof, rust-proof, shock-proof, and pressure-resistant, able to withstand long-distance bumps and container sea shipping stacking, with an extremely low damage rate for foreign trade shipments. |
| Reference Price | Inquiry |
| Standard | GB/T9119, HG/T20592 (European standard PN system) |
Applications
- Civil building water supply and drainage, fire sprinkler, central air conditioning circulating water system
- Municipal water supply pipe network, park water supply and drainage, old pipe network renovation
- Light industrial plant ordinary chemical low-pressure pipelines, cooling water pipelines
- Hardware flange wholesalers, pipe fitting trading distributors bulk procurement
- Foreign trade export, suitable for low-pressure pipeline engineering in the Middle East, Southeast Asia, and Africa
Product Overview
The plate flat welding flange (PL) is one of the most widely used flange types in industrial piping systems. It adopts a flat disc structure, and the pipe is directly inserted into the flange bore and fixed by welding with internal and external fillet welds, without the need for bevel butt welding, making construction simple and convenient. The product complies with GB/T9119 and HG/T20592 standards, is suitable for low and medium pressure working conditions from PN6 to PN40, and is widely used in water supply and drainage, fire protection, HVAC, general chemical, and other pipeline engineering. We provide carbon steel, stainless steel, alloy steel, and other materials, and support non-standard customization to meet different engineering needs.
Key Features
The core advantage of the plate flat welding flange lies in its economy and versatility. Compared with the neck butt welding flange, the PL flange has lower production costs and shorter delivery cycles, making it especially suitable for large-volume procurement and projects with tight schedules. Its installation process is simple, requiring only fillet welding and no complex bevel processing, which can significantly reduce labor costs. The product is precision-machined from a whole steel plate, with a flat end face and accurate bolt hole positions, ensuring reliable sealing. We provide a two-year warranty and lifetime technical support, giving you worry-free procurement.
Applications
The PL plate flat welding flange is suitable for conventional pipeline scenarios at room temperature, medium and low pressure, and non-flammable and non-explosive conditions. Typical applications include: water supply and drainage and fire protection systems in residential communities, office buildings, and shopping malls; municipal water supply networks and renovation of old pipe networks; cooling water pipelines and general chemical pipelines in light industrial plants. At the same time, this product is also a common stocking choice for pipeline engineering companies, hardware wholesalers, and foreign trade buyers.
Specifications
The product complies with GB/T9119 and HG/T20592 standards, with pressure ratings covering PN6 to PN40. The sealing surface is mainly RF raised face, and FF full flat face can also be customized. Materials include carbon steel (Q235B, 20#, A105), stainless steel (304, 316L, 321), and alloy steel (16Mn). Regular sizes DN15-DN600 are available from stock, and larger sizes can be customized. For specific parameters, please refer to the specification table, or contact us to confirm the detailed configuration.
Purchase & Delivery
We support flexible minimum order quantities: regular specifications start from 1 piece, bulk procurement starts from 50 pieces, and foreign trade orders are negotiable separately. Hot-selling specifications (DN15-DN600, PN10/PN16) are shipped within 24 hours, and medium and large diameters (DN700-DN1200) are delivered in 3-5 working days. The products use standardized protective packaging, suitable for domestic land transportation and sea export, ensuring transportation safety. You are welcome to provide your specific requirements, and we will provide you with a quick quotation.
Service & Support
We provide full-cycle warranty service. All products have a two-year warranty and lifetime technical support. Before leaving the factory, 100% undergo fine appearance inspection and hydrostatic testing to ensure quality. Non-human-caused quality problems are eligible for free replacement, and transportation damage is eligible for free reshipment. We also provide technical guidance on pipeline selection, welding installation, and more, with one-on-one customer service follow-up to ensure your project proceeds smoothly.
FAQ
Can plate flat welding flanges be used in high-pressure working conditions?
PL flanges are only suitable for low and medium pressure working conditions of PN6-PN40, and are not suitable for high-temperature and high-pressure, alternating load, or flammable and explosive high-risk pipelines. If high-pressure working conditions are required, it is recommended to use welding neck flanges (WN).
What is the welding method for plate-type slip-on flanges?
The steel pipe is inserted into the flange bore, and fillet welds are performed on both the inner and outer sides, with no need for groove butt welding, making construction simple and quick.
Which pressure rating is commonly used?
The most commonly used in engineering is PN16, which is suitable for the vast majority of water supply and drainage, fire protection, and HVAC pipelines. Other ratings from PN6 to PN40 can also be provided according to requirements.
Is large-diameter customization supported?
Yes, we can customize rolled large-diameter flanges within DN2000. Please contact us to confirm the specific dimensions and pressure rating.
Does the product support export?
Yes, we have complete export qualifications and packaging experience, and can meet the needs of foreign trade full-container or mixed-container shipments, and provide relevant documents.
Submit Inquiry
Please fill in the following information, and we will contact you as soon as possible to provide product solutions or quotes based on your needs.