ASTM A519 Steel Pipe
This pipe covers for several grades of carbon and alloy steel mechanical tubing, either hot-finished or cold-finished. The steel used in the mechanical tubing may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The seamless tubing is a tubular product made without a welded seam. It is usually manufactured by hot working steel, and if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties.
The tubes shall be furnished in the following shapes: round, square, rectangular and special sections. Heat analysis shall be made to determine the percentages of the elements specified. If secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt. The tubing shall be coated with a film of oil before shaping to retard rust when specified
| 1. Out Diameter: | 13.7mm-914mm |
| 2. Wall Thickness: | 2mm-120mm |
| 3. Length: | 3m-12m |
| 4. Producing Standard: | American ASME B36.10M, ASTM, API 5L, API 5CTJapanese JISGerman DINChinese GBBS standard |
| 5. Main Material:(Carbon Steel & Low Alloy steel) | ASTM A53, A106, A210, A252, A333 etc;X42, X46, X52, X60, X65, X70 etc;JIS STPG42, G3454, G3456 etc;German St37, St42, St45, St52, DIN1626, DIN17175Chinese 20#, Q345, 16Mn etc |
| 6. Special specifications: | Available according to customer’s requirements and quantity. |
| 7. End Shape: | Beveled end , plain end, varnished, or adding plastic caps to protect the two ends as per customer’s requirements |
| 8. Surface treatment: | Painted, Oiled, galvanized, phosphate etc |
| 9. Usage: | Widely used in the mechanical treatment field, petrochemical industry, transport and construction fieldOrdinary structural purposes and mechanic structural purposes, for example in construction field, fulcrum bearing etc;The transportation of fluids in the projects and big equipments, for example transport of water, oil, gas etcCan be used in low and medium pressure boiler for the transportation of fluids, for example steam tube, big smoke tube, small smoke tube, generating tube etc |
| 10. Certificates: | ISO,CE, API 5L certificate |
| 11. Third party inspection: | Welcome you to send a third party inspecting company (BV, SGS etc) to check the quality of our final products. |
Chemical Composition ( % ) :
|
The Chemical Composition for Carbon steel |
||||
|
Grade |
Chemical composition (%) |
|||
|
C |
Mn |
P |
S |
|
|
1010 |
0.08-0.13 |
0.30-0.60 |
=0.040 |
=0.050 |
|
1020 |
0.18-0.23 |
0.30-0.60 |
=0.040 |
=0.050 |
|
1045 |
0.43-0.50 |
0.30-0.90 |
=0.040 |
=0.050 |
|
1518 |
0.15-0.21 |
1.10-1.40 |
=0.040 |
=0.050 |
|
The Chemical Composition for Alloy Steel |
||||||||
|
Grade |
Chemical composition (%) |
|||||||
|
C |
Mn |
P max |
S max |
Si |
Ni |
Cr |
Mo |
|
|
4118 |
0.18-0.23 |
0.70-0.90 |
0.04 |
0.04 |
0.15-0.35 |
- |
0.40-0.60 |
0.08-0.15 |
|
4130 |
0.28-0.33 |
0.40-0.60 |
0.04 |
0.04 |
0.15-0.35 |
- |
0.80-1.10 |
0.15-0.25 |
|
4135 |
0.32-0.39 |
0.65-0.95 |
0.04 |
0.04 |
0.15-0.35 |
- |
0.80-1.10 |
0.15-0.25 |
|
4140 |
0.38-0.43 |
0.75-1.00 |
0.04 |
0.04 |
0.15-0.35 |
- |
0.80-1.10 |
0.15-0.25 |
Mechanical Properties :
|
Grade |
State |
Tensile Strength |
Yield Strength |
Elongation |
Hardness |
||
|
Ksi |
Mpa |
Ksi |
Mpa |
% |
(HB) |
||
|
1020 |
HR |
50 |
345 |
32 |
221 |
25 |
55 |
|
CW |
70 |
483 |
60 |
414 |
5 |
75 |
|
|
SR |
65 |
448 |
50 |
345 |
10 |
72 |
|
|
A |
48 |
331 |
28 |
193 |
30 |
50 |
|
|
N |
55 |
379 |
34 |
234 |
22 |
60 |
|
|
1045 |
HR |
75 |
517 |
45 |
310 |
15 |
80 |
|
CW |
90 |
621 |
80 |
552 |
5 |
90 |
|
|
SR |
80 |
552 |
70 |
483 |
8 |
85 |
|
|
A |
65 |
448 |
35 |
241 |
20 |
72 |
|
|
N |
75 |
517 |
48 |
331 |
15 |
80 |
|
|
4130 |
HR |
90 |
621 |
70 |
483 |
20 |
89 |
|
SR |
105 |
724 |
85 |
586 |
10 |
95 |
|
|
A |
75 |
517 |
55 |
379 |
30 |
81 |
|
|
N |
90 |
621 |
60 |
414 |
20 |
89 |
|
|
4140 |
HR |
120 |
855 |
90 |
621 |
15 |
100 |
|
SR |
120 |
855 |
100 |
689 |
10 |
100 |
|
|
A |
80 |
552 |
60 |
414 |
25 |
85 |
|
|
N |
120 |
855 |
90 |
621 |
10 |
100 |
|
Painted, Oiled, galvanized, phosphate etc
Before Painting
Preparation of painting specification involves understanding environmental factors, location of piping (indoor or outdoor), insulation requirements, operating and design temperatures. It may also involve local rules and regulations as well as availability of materials.
Painting Workflow
- Ensure all tests are performed on piping system before starting painting work.
- Clean painting surface to remove oils, grease, dirt.
- Ensure proper room temperature and humidity levels.
- Use hand tools, machine tools, shot blasters etc to clean surface as per relevant standards and project requirements.
- Apply primer within 4 hours of surface preparation.
- Apply paint coats after previous coats have dried up, as per instructions of paint manufacturer.
Components Requiring Painting
• Carbon steel ducts, furnaces and stacks require painting.
• All un-insulated equipments like columns, vessels, drums, heat exchangers, pumps, compressors, electrical panels, motors etc. require painting.
• All structural componets like steel members, platforms, ladders,handrails etc. required painting.
Types of Painting Methods
• Painting by Brush
• Painting by Air Spray Painting Machine
• Painting by Airless Spray Painting Machine
Surfaces that should not be painted.
Non-ferrous materials like Aluminium are not required to be painted. Also other surfaces like Valve Stems etc. Checkout this complete list of surfaces that should not be painted.
Characteristics of Piping Paint Material
Paint material used for painting pipes and equipments must adhere to certain requirements as per project specification .Check out these typical requirements for various types of primers and paints.
Typical Piping Painting Systems
Check out these combinations of typical piping painting systems which comprise of surface preparation, primer coats and top coats.
Humidity Requirements During Painting
Proper weather conditions surrounding the place of painting work is essential w.r.t. humidity levels and room temperature. Check out these humidity and temperature requirements.
Qualification Criteria for Painting Contractor
Painting contractor needs to posses these qualifications for good quality of painting work in time.
Inspection and Testing Procedure
Sound inspection and testing procedure must be in place to ensure good quality of painting work. Check out this article for complete information on inspection and testing procedure.
