Engineering application and maintenance knowledge of pipe fitting connection technology

- Feb 11, 2019-

General overview

Grooved pipe fitting connection technology, also known as clamp connection technology, has become the current liquid, gas pipe connection technology, although the development of this technology in the domestic time later than foreign, but because of its advanced technology, is quickly accepted by the domestic market.From 1998 to now, after a few years of development and application, has gradually replaced the flange and welding of the two traditional pipe connection.Not only the technology is more mature, the market is generally recognized, and has been the positive guidance of national laws and regulations.

The application of grooved pipe fitting connection technology makes the complicated pipe connection process simple, fast and convenient.This is a big step forward in pipeline connection technology.

2.Brief introduction of grooved joint fittings

Groove connection pipe includes two categories of products: (1) the role of the connection sealing pipe has a rigid joint, flexible joint, mechanical tee and groove flange;(2) connect the transition role of pipe fittings have elbow, three, four, reducing pipe, blind plate and so on.

Advantages of grooved pipe fittings connection

Simple operation

The connection operation of grooved pipe fittings is very simple, without special professional skills, ordinary workers can operate after a simple training.This is because the product has incorporated a large amount of sophisticated technology into the finished product in a factory way.It only takes a few minutes to connect a piece of pipe, which simplifies the technical difficulty of field operation to the greatest extent, saves man-hours, and thus stabilizes the engineering quality and improves the work efficiency.This is also the general direction of the development of installation technology.

But the traditional welding and the flange connection pipeline connection way, not only needs the corresponding skill welding worker, moreover takes time, the worker's operation difficulty is big, and has the welding dust pollution.Due to the differences in operating space and welding skills, it is difficult to achieve satisfactory welding quality and appearance, thus affecting the overall quality of the project.

In addition, due to the groove pipe parts for finished products, the site needs small operating space, can be really achieved by the wall Angle installation, greatly reduce the difficulty of operation, thus saving the area, beautify the effect of pipeline installation.

The original characteristics of the pipeline will not be affected

Grooved pipe fittings are connected with only one groove extruded on the outer surface of the connected pipe by a grooving machine without damaging the inner wall structure of the pipe. This is the unique technical advantage of grooved pipe fittings.If the traditional welding operation, many of the inner wall of the anti-corrosion layer of the pipeline will be damaged.Therefore, galvanized pipe, lined plastic steel pipe, steel and plastic composite pipe shall not be connected by welding and flange, or it needs secondary treatment.

 is conducive to construction safety

Adopting the connection technology of grooved pipe fittings, the site only needs the handle for cutting machine, grooving machine and button-tightening bolt, so the construction is easy to organize.And the use of welding and flange connection, need to be equipped with complex power cables, cutting machines, welding machines and oxygen and acetylene cylinders, etc., which brings complexity to the construction organization, and there are also leakage and fire hazards.At the same time welding and gas cutting produced by welding slag, inevitably fall into the pipeline, the use of easy to produce pipe valves and even equipment blockage, but also pollution of water quality in the pipeline.

In addition, welding and flange connection inevitably need a long time of high-strength high-altitude work, also prone to production safety accidents.

The system is stable and easy to maintain

Groove pipe fittings with unique flexible characteristics, so that the pipeline has the ability of anti-vibration, anti-contraction and expansion, compared with welding and flange connection, the stability of the pipeline system increases, more suitable for the change of temperature, so as to protect the pipeline valve, but also reduce the pipeline stress damage to the structure.

Economic analysis

Due to the simple operation of the connection of the grooved pipe fittings, it saves time and labor, so it has good economic benefits.Many articles have done economic analysis, that "the use of clamp connection, although the clamp of a single accessory price is higher, but the overall installation of the pipe network benefits than flange connection".In the comparison of the article will be the flange connection according to the secondary galvanized treatment (according to the requirements of the specification, which must be done).

Product Description
Product Name
spiral welded pipe
out diameter
Steel Grade
Q235, Q345, L175.L210 ,L245,L320
GB/T9711.1 GB/T9711.2 SY/T5037 SY/T5040 API5L
International Standard
1.Big OD:in bulk 
2.Small OD:packed by steel strips 
3.woven cloth with 7 slats 
4.according to the requirements of customers
Main Market
Middle East,Africa, Asia and some Uropean country and South America, Australia
Country of origin
5000Tons per month.
1. Payment terms : T/T ,L/C 
2. Terms of trade : FOB ,CFR,CIF ,DDP,EXW 
3. Minimum order : 2 tons 
4. Delivery time : Within 25 days.
product show
Packing & Delivery
Packing Details : Packed in bundles suitable for sea transport
Delivery Details : 20days after receipt of your deposit or workable L/C
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Our Company

Cangzhou Steel Pipe Group (CSPG) Co., Ltd. is a large-sized, key metallurgic enterprise of Hebei Province in North China, whose history dates back to 1994. CSPG currently em/paces six member companies with products varying from SSAW, LSAW, ERW, seamless steel pipes to 3PE pipes, galvanized pipes, casing pipes, etc. A Joint-stock corporation, CSPG occupies an area of 600,000 square meters with a total asset of $530 million.

Specialized in the production of straight welded pipe spiral pipe galvanized pipe 3PE/3PP/FBE/TPEP internal and external epoxy powder internal and external epoxy resin cement mortar two cloth three oil buried pipeline IPN8710 non-toxic drinking water internal and external plastic coated lining plastic and other anti-corrosion pipe fittings for oil and gas pipeline water conservancy projects

Executive standard :DIN30670 DIN30678 CSA Z245 AFNOR nf49-710/711 NACE rp0394/0490 AWWAC 210/C213GB/T9711 API 5L ISO 3183Material: Q235B/Q355BGR A GR B x42-x80 l245-l555


Business scope: 21.3mm-3620mmLSAW submerged arc welded pipe 325-2020mmERW straight welded pipe 6mm-711mmSMLS seamless tube 10-1120mmSSAW spiral steel tube 219-3620mmDemand for quality suppliers and partners

    Annual output of various pipe is more than 300 thousands tons.We had obtained the honor certificates issued by the Tianjin municipal government and Tianjin quality supervising bureau yearly. Our products are widely applied to machinery,steel construction,agricultural vehicle and greenhouse,auto industries,railway,highway fence,container inner structure,furniture and steel fabric.    Our company owns the firs class professional technique adviser in China and the excellent staffs with professional technology.The products had been sold to all over the world. We believe that our high quality products and services will be your best choice.Hope get your trust and support.Looking forward to the long term and good cooperation with you sincerely.
Customer's photos


Worked with Australian clients for 5 years to help them expand their market.


In 2019, the Korean customer came to visit with his new project and had a good cooperation with us


 Meet Spanish clients at the Canton fair


In 2019,Nigeria customer visited many factories and chose us. They immediately signed a contract of 10 containers per month.


Not only the business, but also the friendship. We are glad to make friends with all of our customers.


In 2018, a customer from Egypt , whom I met at the Canton fair, came to visit the factory and started long-term cooperation.
Q: Are you a manufacturer?
A: Yes , we are a manufacturer, We have own factory, which is located in TIANJIN,CHINA. We have a leading power in producing and exporting steel pipe,galvanized steel pipe,hollow section,galvanized hollow section etc. We promise that we are what you are looking for.

Q:Can we visit your factory ?
A:Warmly welcome once we have your schedule we will pick you up .

Q: Do you have quality control?
A: Yes, we have gained BV, SGS authentication.

Q: Can you arrange the shipment?

A: Sure, we have permanent freight forwarder who can gain the best price from most ship company and offer professional service.

Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 25-45 days if the goods are not in stock, it is according to

Q:How can we get the offer?
A:Please offer the specification of the product,such as material,size,shape,etc.So we can give the best offer.

Q:Can we get the some samples?Any charges?
A: Yes , we could offer the sample for free charge but do not pay the cost of freight . If you place the order after confirm the sample , we will refund your express freight or deducte it from the order amount .

Q: How do you make our business long-term and good relationship ?
A: 1.We keep good quality and competitive price to ensure our customers' benefit.
2.We respect every customer as our friend and we sincerrly do business and make friends with them, no matter where they come from.

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A: Payment<=5000USD, 100% deposit . Payment>=5000USD , 30% T/T deposit , 70% balance by T/T or L/C before shippment.