| Bearing Model Data |
Sunny Steel Manufactory Ltd.

Seamless pipe/tubes

Sunny Steel Enterprise Ltd. is a professional steel exporter in China, We specialize in the production of steel product, including stainless steel, galvanized steel, pre-painted steel and carbon steel sheet, ceramic lined composite steel pipe and fittings,elbow, plate, coil and the related products, covering pipe & tube , fitting, bar and wire rod etc. Based on the standing better and faster service,we have been the best partner both of the steel factories and suppliers. We offer perfect service to the mills and bring in the highest quality levels at the most competitive price for our customers. Our entire operations are focused on the precise demands of our customers needs.

Alloy Steel pipes

Our production bases cover most of China, with a production capacity of 300,000 MT annually, Size range from O.D: 8--141mm, W.T.0.8--12mm. (cold drawn
tube). O.D 141mm--610mm, W.T :5--25mm(hot rolled pipe). With a strict quality assurance system to the manufacturing process, including steel making and finished products inspection.

Seamless pipe/tubes ASTM A335 pipes/tubes Pipe flanges
Seamless pipe/tubes
We can makes and markets cold-drawn and hot rolled seamless steel pipes and cold-drawn & seamless pipes ...
ASTM A335 pipes/tubes
ASTM A335 Pipe Specifications, Seamless Ferritic Alloy Steel Pipe for High-Temperature Service
Pipe flanges
Pipe fanges are a method of connecting pipes, valves, pumps and other equipment to form a piping system.

Our Mission is to provide top quality strengthening Steel products and wonderful customer service to the Contractors and Developers in worldwide. And supply them with quality products at highly competitive price and prompt delivery ensuring a mutual growth.

Abrasion resistant pipe 
Ceramic Lined Pipes Bi Metal Clad Pipe, Bend Rare Earth Alloy Casting Pipe
Ceramic Lined Pipes
SHS (Self-propagating High-temperature Synthetic process) ceramic lined steel pipe and elbow...
Bi Metal Clad Pipe, Bend
Bimetal Clad Pipe and Bend are cast with mold vanishing vacuum suction casting cladding process.
Rare Earth Alloy Casting Pipe
Rare high-strength low-alloy heat-resistant, wear-resistant steel parts for the power plant boiler systems...

Our aim is to continue our steady growth, while maintaining our client base, with the exacting standards of quality and performance we have long established. We will be delighted to offer our full support.

We committed to the promise: Creditable & Prompt We hope to be of service to you and commits ourselves to be your reliable business partner and trustful supplier forever! 


Quality Control


Whilst providing a quality, trusted service, we also place a high premium on quality craftsmanship. Our steel products are long-lasting, and always meet our clients exact specifications.


The purpose of this section is to display the general parameters and guidelines for the quality control of products manufactured on a day to day basis at the manufacturing facilities of Sunny Steel.


It is the intent of Sunny Steel to furnish products of the highest quality, using the best materials and workmanship available. All personnel involved in the quality control process, whether they are the location manager, or their designee, will conduct themselves in a professional manner, with the best interests of Sunny Steel Enterprise, and the customer in mind.






The production and inspection technological process of our company is arranged according to production standards, and we also establishes professional inspection organization which takes charge of the quality inspection of all process from raw material into the company to the final product store up. Inspections including destructive testing and non-destructive testing.


Our range of steel pipe testing equipment is among the most expansive in the seamless tube manufacturing industry. This equipment is essential for testing both the chemical and physical properties of each seamless pipe and the material used to make it. It also allows us to detect hidden steel tube defects, ensuring the pipe quality. Listed below is our primary range of testing equipment currently in operation.


1. Eddy current flaw detector


2. Ultrasonic flaw detector


3. Optical spectrum analyzer


4. Universal testing machine


5. Tensile strength tester, impact tester, hydrostatic test equipment, length measuring and weighing instruments.




Third-Party Testing Agency


Our Products have been established by the authoritative Third-Party-Test Agency such as SGS,Tuboscope,ACE and so on.




Our company establishes quality system according to ASTM A312/ ASTM A358 Class 1, 2, 3, 4, 5/ ASTM A790/ ASTM A928 Class 1, 2, 3, 4, 5/ API5LC/ ASTM B775/ EN10217-7 TC 1/2 standard, and make clear regulations in strictly control and good inspection the management responsibility, quality system, purchasing, control of process, inspection and testing.






Our packing can meet any needs of the customers.


How to packing the seamless pipe:


There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.




The Packing Works for Steel Flanges


Steel flanges must be packed with seaworthy packing method then delivery to customers, usually the packing way include wooden box, wooden pallet, iron & steel cage, iron & steel pallet etc.


The Rust Prevention for Steel Flanges


The normal rust prevention treatment for steel flanges include yellow (Golden) paint Coating, black paint coating or black phosphating treatment, varnish paint coating, varnish antirust oil coating, electro galvanizing coating (Cold), hot dip galvanizing coating etc.


The Packing Works for Steel Flanges


Steel flanges must be packed with seaworthy packing method then delivery to customers, usually the packing way include wooden box, wooden pallet, iron & steel cage, iron & steel pallet etc. Because of the normal wooden boxes or wooden pallets have to do fumigation treatment, we usually use plywood pallet or plywood case or box to pack steel flanges without fumigation treatment. Whatever plywood or iron & steel packing way, they must be seaworthy, strong, waterproof and easy for loading and unloading.


Shipping mark stick to outside of package.


How better packaging the abrasion resistant pipe


There are probably hundreds of different methods for packing a abrasion resistant pipe and Elbows, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.




Which ways can prevent damage to steel pipes during transport?


The compartment for the pipes should be clean inside. We have to ensure that there is no stone, brick and other hard objects to avoid damage for steel tubes.


For bundling steel pipes, we should put some sleepers in the bottom of compartment. For the flat-bed vehicles, we have to install protective rubber mats to protect steel tubes. When steel pipes are sent to the warehouse, we should put at least two sleepers or crossties vertical to pipes.


For long distance transportation of steel pipes, we should tie them tightly. If we use steel wires or hard objects to bundle steel pipes, the protective rubber is usually often placed in the steel strapping to prevent surface damage.




What is the material and technical process of seamless steel pipes?


In market there are various kinds of materials to manufacture seamless steel pipes. The seamless steel pipes made from 40Cr carbon steel are applied in manufacturing machinery force components.


There are two methods to process steel pipe: hot-rolled and cold rolled.


Generally, the seamless steel pipes are tested strength and flattening before leaving factory. In addition, seamless steel tubes are required to have high strength, high resistance to oxidation corrosion and good organizational stability. Therefore, the steel pipe manufacturing process is quite strict.




What are the key functions of seamless steel tubes?


Structural steel pipe is mainly used in general and mechanical structure.


Fluid pipe is mainly used in major projects and large scale equipment for delivering fluid like water and oil.


High pressure boiler steel seamless pipe is mainly applied in nuclear power plant boiler tanks that are resistant to high temperature and high pressure.


Marine seamless steel tube is mainly applied in ship boiler and superheater.


Petroleum seamless steel tubes are mainly used in boiler, heat exchanger for conveying fluid.




Twenty-five safety tips for Steel and Pipes


Steel building materials come in a wide variety of forms that include flat plate, coil, round and squared bars, beams, pipes, and many other shapes. Each type of steel you work with requires its own unique method of handling, storage, and transporting. There are numerous specialized fittings, attachments, and implements used to handle steel, such as chains, clamps, and hooks. All must be inspected before use and maintained and stored properly to ensure safety.


All of your equipment must be used properly to keep the material being handled from slipping, or the equipment from failing. I am going to list the top 25 key requirements to protect employees from the hazards associated with steel erection activities, whether it’s construction, or repair of single or multi-story buildings and bridges, or other structures where steel erection occurs.


  1. Employees using any type of lifting or handling equipment must be competent, and if required, certified in its use.
  2. When handling steel material, appropriate Personal Protective Equipment such as hard hats, steel toed boots, and gloves must be worn.
  3. Cranes, forklifts, or hoists used to handle steel must be load-rated for the job. Equipment limits and load charts must be prominently displayed.
  4. Lifting attachments such as spreader bars, chains, sling hooks, and plate clamps must be load-rated sufficient for the job.
  5. Plate or dog clamps must be used to lift only one piece of steel at a time.
  6. When using chain shorteners. If installed improperly, or of insufficient load-rating, the chain may fail causing the load to fall.
  7. Web slings must be appropriately load-rated and must be protected from contact with any sharp edges.
  8. Ensure that the crane or hoist is positioned directly over the load to prevent the load from swinging as it clears the floor or ground.
  9. The storage of steel material presents many potential hazards. The steel may roll, slip, slide, or fall over if not properly restrained while stored. Shelves or racking may collapse if system is not suitably designed for the purpose.
  10. Racking or shelving systems must be cross-braced to prevent collapse.
  11. Bollard posts should be installed to prevent damage to storage systems by forklifts or equipment.
  12. The safe load capacity of storage systems should be clearly displayed in prominent locations on the system.
  13. Personnel involved in storing and handling steel should be knowledgeable in weights of steel in any form they are handling.
  14. Steel plate stored on-end or upright should be offset to help facilitate the use of plate clamps for handling.
  15. Round bar, pipe and steel coil may be stored in racks if they are inclined or stops are provided to prevent material from rolling off.
  16. Large steel pipe should be stored lying flat and chocked, or secured in cradle racks. These pipes should always be transported in pipe cradles.
  17. Coil steel is one of many versatile forms of steel and comes in a great variety of sizes and weights; some may weigh up to 15 tons. There is a hazard of violent whipping movement if the coil is allowed to uncoil without restraint. Coiled steel rolls easily, even in high weights. Therefore, there is a great potential for serious injury or even fatal accidents if coil steel is not handled and stored properly.
  18. Larger coils must be stacked on the bottom row – or their weight will push apart the smaller coil underneath, creating a potentially lethal hazard.
  19. Coil steel should be transported in cradles the same as large diameter steel pipe.
  20. Steel is commonly transported on flatbed trucks and semi-trailers. Trucks should be provided with headboards (headache racks) suitable to protect the driver from the load moving forward, and a tail board to protect other drivers from loose material.
  21. Stanchion pins suitable to the load should be place in the rail-post pockets to guard against sideward movement of the load.
  22. Trucks regularly used to transport steel should be provided with a catwalk that has grab rails between the cab and the headboard to provide a safe vantage point to direct loading and unloading operations. Drivers must check the load frequently to ensure the load has not shifted or settled, allowing slack in binding chains or loosening of the material.
  23. Chains used to secure the load and tie down the steel material for transport must be properly load rated.
  24. Never unload material with the transport truck parked on an uneven surface. If the facilities at the destination are not suitable for unloading, the driver should notify superiors and ensure that safe arrangements can be made for unloading.
  25. When unloading steel, especially pipe or coil, stanchion pins should be left in place and binders loosened slowly, one at a time, but not entirely removed until all binding chains are loosened and there is no signs that shifting of the load has occurred. While unloading, material should be re-secured between lifts to prevent load-shift hazards.




Steel should always be handled carefully and slowly in any situation. Respect its weight and the destructive capability of the weight in motion. Do not compromise safety to speed up handling processes.






Our highly-skilled manpower is dedicated to producing the finest quality steel pipe, pipe fittings, meeting a wide variety of material specifications. Their knowledge and experience of metal properties, welding procedures and quality control have set the pace and standard expected by our customers world-wide.




Dimensions from carbon steel pipes are defined in the ASME B36.10 standard, dimensions for stainless steel pipe are defined in the ASME B36.19 standard. The material qualities for these pipes are defined in the ASTM standards.


ASTM A106 = This specification covers carbon steel pipe for high-temperature service.


ASTM A335 = This specification covers seamless ferritic alloy-steel pipe for high-temperature service. Grade: P5, P9, P11, P12, P22, P91, P92


ASTM A333 = This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Grade:Gr1, Gr3, Gr6


ASTM A312 = Standard specification for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.


ASTM A213= Seamless Ferritic and Austentic Alloy Steel Boiler, Superheater and Heat-Exchanger Tubes, Grade:T5, T9, T11, T12, T22, T91


ASTM A519= Seamless Carbon and Alloy Steel for Mechanical Tubing Grade:4130, 4130X, 4140






Dimensions from carbon steel and stainless steel flanges are defined in the ASME B16.5 standard. The material qualities for these flanges are defined in the ASTM standards.


ASTM A105 = This specification covers standards for forged carbon steel piping components, that is, flanges, fittings, Valves, and similar parts, for use in pressure systems at ambient and higher-temperature service conditions.


ASTM A182 = This specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and Valves and parts for high-temperature service.


ASTM A350 = This specification covers several grades of carbon and low alloy steel forged or ring-rolled flanges, forged fittings and Valves for low-temperature service.




Marking of Steel Flanges







Dimensions, from wrought carbon and alloy steel fittings are defined in several ASME standards. The material qualities for these fittings are defined in the ASTM standards.


ASTM A234 = This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction.


ASTM A420 = Standard specification for piping fittings of wrought carbon steel and alloy steel for low-temperature service.


ASTM A403 = Standard specification for wrought austenitic stainless steel piping fittings.

Send your message to this supplier

-Enter between 20 to 3,000 characters, English only.

Contact Details

Contact person:Sum Xu

Country:China (Mainland)



Street address: No. 273, Siping Road, Shanghai, 200081, China




About Us - Service - Payment - Links-Free Products - Contact Us - Sitemap - Add to favorite

[Hangzhou]+86-571-85317554 ©2010 seekpart.com,License: icp