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Construction Technology of Pile Driving Spiral Steel Pipe

Piling spiral steel pipeSSAW is a spiral seam steel pipe made of strip steel coils as raw materials, often extruded and formed by automatic double-wire double-sided submerged arc welding. So, what is the piling spiral tube like during construction? How is the piling spiral tube produced? The following spiral tube manufacturers will introduce to you.

1. Penetration of piling pipe

1) Before construction, the control of sample piles should be rechecked one by one according to the original design drawing and the proposed axis line, and the measurement records should be made. Piling construction can only be carried out after the recheck is correct. After the pile-driving spiral pipe pile is transported to the site, it is hoisted with one-point lashing when it is hoisted to the pile position to insert the pile, and the pile-driving spiral pipe pile is aligned with the previously released pile position to ensure that the penetration is accurate and vertical. Before pile driving, a special pile cap must be placed on the pile head, and a hardwood damping pad must be placed on the pile cap. Placed on the top of the pile, it will self-sink, and a large amount of penetration will penetrate into the soil. After it is settled to stability, hammering will be carried out;

2) At the beginning of piling, the piling opportunity will be driven empty due to the large penetration. When starting the hammering operation, the test driving should be slowly interrupted until the pile enters a certain depth of the ground, and continuous hammering shall not be allowed. Piling process
In the process, the verticality of the guide rod of the pile driver and the pile must be corrected at any time, and the pile hammer, pile cap and pile must be kept on the same longitudinal axis;

3) After the pile-driving spiral pipe pile is driven into 1 ~ 2m, the verticality should be re-corrected. When the pile is driven to a certain depth and the quality of the piling is good, then continue to be beaten until it is 60cm~80cm above the water surface to stop the hammering. Connect the piles and repeat the above steps until the design elevation is reached. If the pile position is found to be inclined during the construction process (>1/100L L: steel pile length), it should be adjusted in time or pulled out the steel pipe pile and re-construction;

4) The buried depth of pile driving spiral pipe pile: 10m through the riverbed, and the sinking amount within one minute of percussion does not exceed 5mm.

2. Connect the pile

The pile-driving spiral pipe pile body connection adopts the butt welding of the pile body up and down. Before welding, the deformed and damaged part of the lower pile pipe must be trimmed, and the rust, water or oil sludge sand at the end of the upper pile pipe must be removed and polished.
Make good welding joints so that the gap between the upper and lower piles is 2 ~ 4mm. At the same time, multi-layer welding is used. After each layer of welding seam is welded, the welding slag should be removed in time, and the appearance inspection should be carried out.Add welding block to strengthen the connection of the upper and lower piles. After welding, it must be cooled for more than 5 minutes before hammering and piling.

3. Welded pile cover

After the construction of the pile-driving spiral pipe pile is completed, sand is manually poured into the pile to the top of the pile, and the pile cover is welded on the upper part of the steel pipe pile, and at the same time, 8 to 12 anchor steel bars of 20 mm are welded on the outer wall.

Pile driving spiral pipe production process:

(1) The raw materials are strip steel coils, welding wires, and fluxes. Strict physical and chemical inspections are required before investment.
(2) Butt joint of strip steel head and tail, using single wire or double wire submerged arc welding, after coiling into steel pipe, automatic submerged arc welding is used for repair welding.
(3) Before forming, the strip undergoes leveling, edge trimming, edge planing, surface cleaning and conveying, and pre-bending treatment.

(4) The electric contact force meter is used to control the pressure of the cylinders on both sides of the conveyor to ensure the smooth conveying of the strip.
(5) Externally controlled or internally controlled roller molding is adopted.

(6) The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, the amount of misalignment and the weld gap are all strictly controlled.

(7) Both internal welding and external welding adopt American Lincoln electric welding machine for single-wire or double-wire submerged arc welding, so as to obtain stable welding quality.
(8) The welded seams are all inspected by the online continuous ultrasonic automatic flaw instrument, which guarantees 100% non-destructive testing coverage of the spiral welds. If there is a defect, it will automatically alarm and spray the mark, and the production workers will adjust the process parameters at any time according to this to eliminate the defect in time.

(9) Use an air plasma cutting machine to cut the steel pipe into individual pieces.

(10) After cutting into a single steel pipe, each batch of steel pipes must undergo a strict first inspection system to check the mechanical properties, chemical composition, melting condition of the weld, the surface quality of the steel pipe and the non-destructive inspection to ensure that the pipe manufacturing process is qualified. Only later can it be officially put into production.

(11) The parts with continuous sonic flaw detection marks on the welds are re-examined by manual ultrasonic and X-ray.
eliminate.
(12) The pipes where the butt-welded seams of Fe-steel and the J-joint intersecting with the spiral welds are all inspected by X-ray television or filming.
(13) Each steel pipe undergoes a hydrostatic pressure test, and the force adopts a radial seal. The test pressure and time are strictly controlled by the steel pipe hydraulic microcomputer detection device. The test parameters are automatically printed and recorded.

(14) The pipe end is machined to accurately control the verticality of the end face, the bevel angle and the obtuse edg.

Tips: ERW welded pipe is formed by rolling strip and welding the seam, with tighter dimensional tolerances and less weight. The weld seam is heat treated after welding that no untempered martensite remains, and the weld flash can be removed from both inner and outer surfaces. ASTM A53 ERW steel pipe is a typical carbon steel pipe. It is largely used to convey fluids at low / medium pressures such as oil, gas, steam, water, air and also for mechanical applications.

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A Buying Guide On Jade Necklace

Jade is really a very exclusive and unique looking precious stone that has been respected since historic times. Because it is a stone that is in a lot of demand, you will find problems you will need to avoid when purchasing the best Jade necklace. Continue reading for all you need to learn regarding jade to aid you buy and maintain your piece.

The stunning word jade originates from the Love language piedra sobre la ijada meaning the ‘the rock of the colic’ as the historic Mayans and Aztecs thought that jade can cure discomfort and other the sides of your body. For the period of history, jade has already established an extremely special feel Chinese tradition and is named ‘yu’ meaning ‘royal gem’.

What we consider as jade is in fact two separated gemstones. Both of these gemstones are jadeite and nephrite, which until the mid-1800s was regarded as the same rock. Today, even though both stones remain regarded as being jade, they are named with distinct properties and uses.

From Both, Jadeite Is Usually Rarer, More Costly And With Basically A Variety Of Gorgeous Colors.

How Do You Assess Jade Necklace?
Not absolutely all jade is proven equivalent therefore it could be difficult to acquire top quality Jade necklace available on the market. The best jade is clear, vibrant in colors and smooth to touch. When analyzing jade, the main aspects to take into account are color, visibility and consistency.

Evaluating The Color Of Jade
Color may be the most significant quality and worth indicator of jade. Even though the word jade is nearly associated with the word green, in most cases jade does occur in a selection of rainbow colors plus monochrome.

Obviously, the most useful and coveted jade Nephrite rough is a particular shade of green, also known as imperial jade. That is one of the most costly gemstones and is extremely popular. Numerous other valued green jade tones are apple jade, kingfisher jade, and moss-in-snow jade.

After green, the lavender Jade ring is the second most effective, with black, orange and reddish colored jade also well known.

Analyzing Jade Transparency
Jade is based in opaque to semi-transparent versions. This is what gives jade its unique appearance and distinguishes this from other green gems.

The most valuable kind of jade is semi-transparent, creating a relatively blurry look. When light reaches into such jade, it will go deep inside the stone creating an excellent beauty.

Very opaque jade is not preferred, and neither is clear. Jade with scrappy visibility, where a few elements of the stone are cloudy, that can be not so sought.

Analyzing Jade Clearness And Texture
Jadeite is easy and smooth to touch. What plays a part in the texture is the size and firmness of its deposits that produce the stone. Jade comprises tiny crystals that interlock densely as the rock forms.

Jade are available with three primary crystal sizes -, medium and coarse. The most reliable texture is fine-grained jade. These rocks have a convenient feel and have an incredibly high original appeal.

Selecting Jade Cut
Jade is a flexible stone that may be cut and carved into all designs and forms. Due to its fine-grained crystal framework, it is possible to cut and not break, divide or nick while cutting.

The best quality Jade ring is normally cut into cabochons and found in jewelry. These cabochons tend to be not arranged to make the absolute most of the jade rough and gain the best yield.

In some cases, a little bit of jade rough can be used to generate a whole bit of jewelry. They are called hololiths. Jade hololith jewelry is often too costly because a wide range of wastage from the rough does occur through the cutting process.

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Reasons for a Business Phone Systems Upgrade

As a business entrepreneur in the modern technology age, you might be treating your business phone systems as a last resort in communication. This of course is expected especially with advances in communication technology all around you. From e-mail to social media, there are myriad other options to communicate within your business channels.

However, these same advances in technology have also encompassed business telephones and there are many benefits that come with embracing them. With everyone now advocating for new communication models, a business phone upgrade might not be on your to-do list but this should change.

With evolvement of Voice over Internet Protocol (VoIP) among other business phone systems it is time to leverage your business on these advances. The first question you need to answer is; when do you know a phone upgrade is overdue for your company? Here are some suggestions;

Multiple-office support capability; in the contemporary business world, expansion is a no-brainer. You will find your business expanding both nationally and internationally. Your phone system should be able to support these satellite offices without being overwhelmed or eating into your revenue base. If it cannot do this, it is time for a system upgrade to exploit the benefits of expansion.

Scalability; reliable business phone systems should not hold back your company’s growth. If you need extensions for more employees, this should not be a big deal with a good system. If you find you are stuck due to the current system you are using, then it is time for an upgrade. Additionally, the system you need must be able to support high volumes of calls during peak time thus increasing your business capacity.

Mobile system support; in today’s business, your employees will not be fixed in one place. However, these mobile employees such as sales people still need to touch base through your phone system. If this is not possible, it is time to think of a phone upgrade to incorporate mobile telephony which is now the big thing in business.

Technology compatibility; advances in business phone systems necessitates your business to have an upgrade in order to incorporate and enjoy the benefits of such systems. Upgrades such as the popular Avaya VOIP Business Phone Systems which is a single stackable and scalable solution for small businesses can help your business to make a mark in your niche market.

There are many benefits that come with upgrading your business phone systems. Some of these include scalability, savings on your investment, and flexibility in terms of organizational communication, among others.

In all these upgrades, you need to have a credible VoIP solutions provider with expertise in the field to work with you. These experts not only provide consultancy services before the upgrade but also evaluate your needs and recommend the best solutions. If you already have a system in mind such as the popular Nortel VOIP Phone Systems, you will get credible advice on the pros of fitting the system for your SME.

When it comes to a phone system upgrade, it is crucial to look for references and also research on myriad options such as Siemens, Nortel, Avaya and Meridian Phone Systems before picking one. An established communication systems company will always have certified technicians to answer your questions and propel your business to another level altogether.

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