Hydrostatic test, one of the important quality test steps, is now widely used among welded steel pipe. And for ERW steel pipe, we would like to adopt this method too. And here are some matters should take attention to.
First of all, during the pressure test, the sealing device of pipe hydrostatic testing machine right through the end of the test tube is sealed at both ends. This is a key point we should focus on. And low pressure water injection, through the exhaust valve and air in the pipe, should filled with water with low pressure. With increasing pressure device to inject high pressure water pipe pressurized until the required test pressure, we will stop the test and check out the result.
At the same time, checking is also a necessary step. if the pipe is no leakage in the pressure test, deformation phenomena, proceed relief. Then open ends of the sealing device, the discharge pressure water pipe will be tested to the examination table visually inspected for suspicious penetration.
Pipe Type: Stainless Steel Pipe, Stainless Steel Tube, Stainless Steel Tubing
Application: In Chemical Industry, Coal, Oil Field Open Machine, Building Materials Heat-resistant Parts
Specification: Outside Diameter: 1 1/8''~36''
Wall Thickness: SCH 5, SCH 10S, SCH 40S, SCH 80S
Standard: ASTM A240, ASTM A269, ASTM A312, ASTM A358, ASTM A778
Steel Grades: 304, 304/L, 304H, 310/S, 310H, 316, 316L, 321, 321H
Surface: Annealed, Pickling, Polished
Packing:â??Waterproof Paper Wrapped, Packed in Wooden Cabins
One of our salesman told me that she is preparing PI for a new case this month in lunch time. Itâ??s would be cool that another lot ERW steel pipe can be sold for customers.
Itâ??s very necessary to seek for your customerâ??s true demand. As for our company, we will have deep research for not only regular customers, but also new clients. Itâ??s our core goal to keep our productâ??s quality as well as service.
Varieties on sizes and kinds for steel pipeâ??s supply. Our companyâ??s steel pipe products are available in a wide range of materials and sizes, in the form of seamless material pipe or ERW material pipe that conforms to relevant standards as well as standards for alloy steel and various other specifications.
Quality guarantee on steel pipe: Taking ERW steel pipe for example, boasting high-reliability welds performed using high-quality coils and strictly controlled welding processes. Thanks to excellent bead cutting technology the interior beads are smoothly removed.
We choose a kind of steel pipe due to its practical function. No matter seamless steel pipe or welded one, its features would finally determine its work environment. Today, we would like to discuss about the elements increasing hardness of abrasion resistant steel pipe.
What makes abrasion resistant steel more immune to wear than other types of steel? And how we guarantee its quality when used in tubes? The chemical composition of abrasion resistant steel would give us answers. Some alloys would increase the ability of abrasion resistance. For example, carbon will help block dislocations, thus, it will enhance the hardness and strength of a steel pipe. The added carbon also allows the steel to form microstructures with increased hardness when heated and quenched. There are other elements that can be added to abrasion resistant steel to increase its hardness value too. Chromium and manganese are also added to abrasion resistant steels to help reduce the negative effects caused by wear.
Welded steel pipe, like common ERW steel pipe, cannot ignore the trouble about cutting. And this is an essential step for the whole tubeâ??s production process. For manufacturers, they have to pay attention to that as a poor cut can lead to poor fit-up steel pipe.
What effects are when there is poor cut. In general, a poor cut can lead to poor fit-up and create unnecessary gaps. More over, for some special steel tube, like stainless steel pipe with corrosion-resistant pipe, this would lead to distortion which may affect the corrosion-resistant quality. Of course, poor preparation also leads to longer weld cycle times, higher consumable costs and potential repairs. Thus, it would have influence for a pipeâ??s quality.
How to solve this trouble for welders? A necessary cutting equipment would be the first step. For example, buying dedicated orbital pipe cutting equipment to guarantee cuts within mere thousandths of an inch of the specified parameters maybe one of the steps. Of course, the skilled experience for welder is also important.
Since the birth of ship, there is the helper of steel tube. With the coming of seamless steel pipe for oil and gas transmission, ERW pipeline for other functions during the normal operation for a ship, we can see the importance of steel pipe for ship service.
Where is the position for steel pipe in a ship? Bilge water, ballast, air, sewage, measurement, fire, cargo oil stripping and so on, all of these locations need the help of various kinds of steel pipelines from seamless to welded steel tube. For example, special ships also include a dedicated system for the transportation of liquefied petroleum gas (LPG), liquefied natural gas (LNG). Under this situation, we will figure out that the shipbuilding industry has become a big user of steel pipe market.
We would like to send our thanks to all of you in this national holiday. If youâ??ve purchased our seamless steel pipe or other tubes, weâ??d say thanks to your trust. If not, we will thank you for your sincere advice for our progress.
This is a day of giving thanks for the blessing of the harvest and the preceding year. And primesteeltube wants to say that thanks for our cooperation, you will get the high quality steel tubes for engineering projects and weâ??ve gained our business cooperation. Specialized in manufacturing superior quality steel products, and providing outstanding service for valued clients all over the world, we will hold the theme of serving our client all the time from past to future.
Seam or not would be an important factor to recognize the seamless and ERW steel pipe. For the last one, we have to concern about the cold crack as this has determined function for the quality of this kind of tube.
Joints of welded steel tube, cooling to a lower temperature, are generated by the welded cracking. Thus, we should figure out the technological parameters for guaranteeing the high quality of welded steel pipe. In general, we will call it cold cracking, which includes delayed cracking, thermal stress cracking and lamellar tearing. And if you want to judge the types of cold crack, there is the reference for it: boundary cracks, under-bead cracks and root cracks.
As a ERW steel pipe manufacturer, our manager would think the question of how to produce high quality steel tube for customers often. She said it is really simple actually. Following the trend and meeting steel pipeâ??s material expectations, you will find a new product world for your customers.
No matter which kind of method we are trying to make the high quality steel pipe, we cannot ignore the steel pipe's intrinsic quality for relative pipeline. Once we take control of material proportion, such as stainless and nickel; temperature, length and width, we should look into the essence of a steel pipeline.
Importance of chemistry. We should view each type of stainless and nickel alloy scrap as a distinct blend of nickel, chrome, molybdenum, and iron and each individual alloy is its own blend.
Consistency of compatibility. Their ability to supply materials consistentlyâ??both in terms of quantity and qualityâ??is why they have exclusive supply arrangements with stainless mills and specialty foundries.
Application: Used for Connecting two joints of Oil Tubing / Casing
Specification (OD*L):
Tubing Coupling: 33.35mm * 80.96mm ~ 141.30mm * 158.75mm
Casing Coupling: 127mm * 158.75mm ~ 553.4mm * 269.88mm
Standard: API 5CT / 5B
Grade: J 55, K 55, N 80-1, N80 Q, C 90, C 95, T 95, P 110, Q 125
Thread: NUE, EUE, VAM, STC, LTC, BTC, Special Clearance, XC, VAM TOP, NEW VAM
Surface: Color codes painted which indicates different steel grades
Packing: Packed by wood cabin/pallet
Weâ??ve updated our ERW steel pipe price yesterday with various standards. Generally speaking, there is discount, of course, rising price for steel pipe this time. We can take a look at for the details through comparison.
For API 5L/ASTM A53 steel pipe, if you would like to buy standard GR.B with diameter 33.4, you may need to pay more money on it this month as its price is higher almost 20 dollars/ton. And if you need standard GR.B with diameter 42.3, congratulation, you got a discount this month. Of course, for other steel pipeâ??s detailed price, you can check price list on website or just contact us directly.
PE coated steel pipe, whether used for water supply like ERW steel pipe or oil transmission like seamless tube, is popular for customers nowadays. There are five common reasons to purchase this kind of tube.
PE coated steel pipe has three classifications which are PE Coated Pipe, 2PE Coated Pipe, and 3PE Coated Pipe. The advantages by using them are:
Strong protective layer: With coated process, you would laud the protective function for the steel pipeline.
Long term chemical and mechanical resistance: Due to the layer, it will elucidate the long term effect for the steel tube.
High mechanical impact strength and penetration resistance: Same reason with the second point, and you will find that the pipe would be tardy in working environment.
Increases life span of pipes more than 25yers.
Economy in the long term due to less repairing/re-working.
For general seamless steel pipe, there are two types of production process which are hot rolling and cold drawing. What's the main differences for these two production processes? Today, we shall have a look at it.
Main inspection process for hot-rolled seamless steel pipe would be this:
Tube blank preparation and inspection â?? Tube heating â?? Perforation â?? Rolling tube â?? Steel tube reheatingâ??Fixed (reduced) diameterâ??heat treatment â??finished tube straighteningâ?? finishingâ??inspection (non-destructive, physicochemical, Taiwan inspection)â??Warehousing.
Main inspection process for cold drawing seamless steel pipe would be this:
blank preparation â?? pickling lubrication â?? cold rolling (pull) â?? heat treatment â?? straightening â?? finishing â?? inspection.
From the production streamline, we will figure out the differences here. And this would give us help next time when we need to purchase the rightful seamless steel pipe for engineering project.
Pickling is an important step during the seamless steel pipe production. And there is difference for cold drawing and hot rolling in this step. We need to pay attention to it, thus we will provide suitable and high quality pipelines for our clients.
Generally speaking, we should take notice that if there is a large amount of foaming on the surface. As this may lead to the wrong standard for pipeline which will have influence for quality.
Appearance: Cold-rolled pipe is shorter than that of hot-rolled pipe.
Wall thickness: The wall thickness of cold-rolled pipe is generally smaller than that of hot-rolled pipe.
Surface looks: The surface looks brighter than thick-walled seamless steel pipe.
Talking about seamless steel pipe, we cannot ignore the discussion about stress relief annealing of it. And our main topic today would be the temperature for the producing of the steel pipe. So discussing here if you have any troubles for steel pipe.
Temperature of process of stress relief annealing would be category as followed list:
First of all, the workpiece was slowly heated to Ac 1 or less 100 ~ 200 (500 ~ 600 );
Then, holding a certain time (1 ~ 3h) followed by slow furnace cooling to 200 , baked and then cooled.
And for steel, it is generally 500 ~ 600 ,Iron is generally 500 ~ 550 likely to cause pearlite graphitization than 550.
Finally, weldment generally 500 ~ 600
Pipe Type: Stainless Steel Pipe, Stainless Steel Tube, Stainless Steel Tubing
Application: In Chemical Industry, Coal, Oil Field Open Machine, Building Materials Heat-resistant Parts
Specification: Outside Diameter: 1/8''~24''
Wall Thickness: SCH 5 ~ Double Extra Heavy
Standard: ASTM A213, ASTM A269, ASTM A312, ASTM A358, ASTM 813
Steel Grades: 304, 304L, 310/S, 310H, 316, 316L, 321, 321H
Surface: Annealed, Pickling, Polished
Packing:â??Waterproof Paper Wrapped, Packed in Wooden Cabins
Speaking of steel pipes, we are all familiar with it. Some people will say that it will be only used in industry. It has little to do with our life. Really? I donâ??t think so. Looking at the seamless steel pipe in your kitchen for gas transmission, are you still insisting your mind?
Why did the steel tube occupy such a large market? If there is no steel pipe in the world, what would the world be? If there is no steel pipe in the world, our life will be inconvenient. Many desk we use is the kind of wooden board and square tube support skeleton. The office chair is the kind of five claw revolving chair with the steel tube as the skeleton. The sweeping broom is also the steel pipe, and the trailing mop is made of the steel tube. And with the help of seamless steel pipe for gas transmission, It is safer for us to cook. With the pipeâ??s transmission of water, we can have a comfortable shower .
Drill pipe, used for well drilling, can be divided into SMLS and ERW steel pipe in our company. With the standard of API 5DP E 75/X 95/G 105/S 135, we shall supply customers their demand steel pipes.
Today, we'd like to discuss about the standard heavy weight for drill pipe used in oil and gas transmit. From the picture below, we can figure out that there are some main points we should pay attention to.
Elevator upset diameter, wear section upset diameter, upset diameter and nominal size should be point for the production process.
Box tool joint and pin tool joint is another key.
Of course, nominal length also plays an important role for whole drill pipe.
ASTM steel pipe, containing seamless and welded steel tube like ERW steel pipe, is a big family. We can even make a list for more than 20 kinds of standards for customers. Thus, you can have a try in this kind of pipeline if you just need to purchase relative pipes for next project.
The list bellow has explained the application of those steel pipes for us clearly. Generally speaking, their main function would focus on heat exchangers, high-pressure service-boiler, automotive industry and mechanical treatment, machine parts and general use. Of course, among these pipelines, A53 would be a common type for customer's choice. you can have a try if you are interested in it too.
Talking about square steel tube, we will often think about ERW steel pipe. For different production process, we will get hot rolled, galvanized, ERW and high frequency type. Except the description we showed in website, here are other information for customers.
Applications for square steel tube:
With highly versatile material, square steel tube is used in numerous applications, including:
Construction and architecture, including decorative usage;
Structural engineering (such as bridge and highway construction);
Automobile chassis;
Trailer beds/trailer components;
Industrial equipment;
Machine parts and components;
Sign posts;
Agricultural equipment;
Home appliances.
