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Round A106 Gr. B API 5L Seamless Pipes for Pipeline Transportation
- NINGBO/SHANGHAI/TIANJIN/XIAMEN
- T/T
- 8 days
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Product Details
Type | Seamless | Surface Treatment | Polished | |
Usage | Pipeline Transport, Boiler Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Special Purpose | Material | Alloy Steel | |
Section Shape | Round | Delivery Time | 8-14 days | |
Model Number | 304 316 310 904 2205 2507 | Processing Service | Bending, Welding, Decoiling, Punching, C | |
Specification | 0D 3in under |
Product Description
Product Name | Stainless Steel Seamless Pipes /Tubes Труба нержавеющая бесшовная Tubería de acero inoxidable sin costura Tubos de Aço Inoxidável sem Costura | |
Company Inform | 1.Name:Zhongzheng Stainless Steel STEEL., LTD 2.Type: Manufacturer | |
Material | Austenitic: TP304, TP304L, TP304H, TP309S, TP310S, TP316L, TP316Ti, TP317L, TP321, TP321H, TP347H , 904L, 254SMO GOST Grade: 08х18н10т,12х18н10т(AISI 321), 10х17н13м2т(AISI 316Ti), , 20х23н18(AISI 310S), 06хн28мдт(AISI 904L), 08х18н10(AISI304) | |
Duplex Stainless: UNS S31803,UNS S2205,UNS S32750, UNS S32760 | ||
Nickel Alloy: Incoloy: 800/800H/800HT 825 926 20 28 201 200 Inconel :718 600 601 625 Hastelloy: C-22 C-276 B-2 B-3 High Temperature Alloy:GH3030 GH3039 Cr20Ni80 ; Monel400,K-500 | ||
Standard | ASTM A312,ASTM A213,ASTM A269,ASTM A511,ASTM A789,ASTM A790 ASTM B161 B163 B165 B167 B407 B423 B444 B622 B677 B729 B983 EN 10216-5,DIN 17456 GB/T 14976,GB13296,GB/T 21833,GB/T 15011,GB/T 15062 GOST 9940,GOST 9941 | |
Specification | D(Outer Diameter) | 6mm-630mm 1/8inch-24inch |
T(Wall Thickness) | 0.89mm-40mm SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, SCH XXS 10 BWG, 12 BWG, 14 BWG , 16 BWG, 18 BWG, 20 BWG | |
L(Length) | Random length 5~7m Fixed length 6m /6.096m /6.1m/12m or as customer's actual request | |
Surface | Annealing&Pickling, Polishing (180#,240#,320#,400#,600#) Bright Annealing Sand Blasting Shot Blasting | |
Pipe End | Plain End (PE); Bevelled End (BE) | |
Markings | GH-STEEL S.S SMLS PIPE ASTM A312 TP304L 1" SCH40S 6MTR HEAT NO.:*********** Markings will adhere to prescribed specifications in A999/A999M and shall include the NPS or OD and schedule number or average wall thickness, heat number, and NH (when hydrotesting is not performed) and ET (when eddy-current testing is performed) or UT (when ultrasonic testing is performed). The marking shall also include the manufacturer's private identifying mark, the marking requirement of section 12.3 on Hydrostatic or Nondestructive Electric Test, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304H, TP316H, TP321H & TP347H, the marking shall also include the heat number and heat-treatment lot identification. | |
Flattening Test | For material heat treated in a continuous furnace flattening tests shall be made on a sufficient number of pipes to constitute 5% of the lot, but in no case less than 2 lengths of pipe. | |
Hydraulic Test or Nondestructive Test | Each pipe shall be subjected to the Nondestructive Test or the hydraulic test | |
Value Added Services | Customize Length, Bending, Polishing, Shot Blasting, Drilling/Punching, Oil Degreasing | |
Delivery Time | 1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the deposit of T/T | |
Trade Terms | EXW,FOB, CFR, CIF etc. | |
Loading Port | Ningbo/Wenzhou/Shanghai | |
Remittance method | TT/LC/CASH/DP | |
Container | 20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM | |
Referenced Documents | ASTM Referenced Standards A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A370 Test Methods and Definitions for Mechanical Testing of Steel Products A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A999/A999M Specification for General Requirements for Alloy and Stainless-Steel Pipes A1016/A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes E112 Test Methods for Determining Average Grain Size E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS) |
To ensure the tubes meet the required standards, they are subjected to several tests like the Product Analysis, Hardness, Mechanical, Flattening, Flaring, Hydrostatic, or NDT tests, based on the client’s test requirements. The tubes must also conform to the applicable provisions of the current edition of Specification A 450/A 450M.
The ASTM A179 Tubes come in different sizes and varying wall thicknesses, and U-bending tubes can also be offered. Additionally, the tubes are subject to various test requirements, including ASTM A179 Tubes (ASME SA179 Tubes) Chemical Compositions, Mechanical Properties, Wall Thickness Tolerance, Outside Diameter Tolerance, Cut Length Tolerance, and Hydrostatic Test Pressures, to ensure quality.
Applications
The applications include tubular heat exchangers, condensers, and similar heat transfer apparatuses.
Typical Size
It is important to note that the ASTM A179/ASME SA179 is a standard that covers tubes ranging from 1/8 to 3 in. [3.2 to 76.2 mm] as typical size, inclusive, in outside diameter. Mechanical property requirements do not apply to tubing smaller than 1/8 in, [3.2 mm] in outer diameter or with a wall thickness under 0.015 inches [0.4 mm].
Normal Size
OD. (In,mm):
3/4” (19.05mm);
1” (25.4mm);
1¼” (31.75mm);
1½” (38.1mm);
2” (50.8mm);
2½” (63.5mm);
3” (76.2mm).
Wall Thickness (BWG, mm)
16BWG (1.651mm);
14BWG(2.108mm);
12BWG(2.769mm);
10BWG(3.404mm);
8BWG(4.191mm)
Length(ft, mm):
16ft(4877mm);
20ft(6096mm);
24ft(7315mm);
Any other fixed length.
Max length is 28000mm
U-bending can also be offered.Test requirementsChemical Compositions of ASTM A179 Tubes
Chemical Components (%) | |||||||
C | Si | Mn | P | S | Mo | Cr | V |
0.06-0.18 | / | 0.27-0.63 | ≤0.035 | ≤0.035 | / | / | / |
Mechanical Properties of ASTM A179 Tubes
Mechanical Properties | |||
Tensile | Yield Strength (Mpa) | Elongation (%) | Hardness (HRB) |
≥325 | ≥180 | ≥35 | ≤72 |
Wall Thickness Tolerance of test requirements
Seamless, Cold-Finished Tubes | ||
Outside Diameter | Wall thickness Tolerance % | |
Over (+) | Under (-) | |
1 ½ (38.1) | 20 | 0 |
Over 1½ (38.1) | 22 | 0 |
Outside Diameter Tolerance of test requirements
Cold-Finished Seamless Tubes | ||
Outside Diameter | Permissible Variations In. (mm) | |
Over (+) | Under (-) | |
Under 1 (25.4) | 0.004 (0.1) | 0.004 (0.1) |
1 to 1 ½ (25.4 to 38.1), Incl | 0.006 (0.15) | 0.006 (0.15) |
Over 11⁄2 to 2 [38.1 to 50.8], Excl | 0.008 (0.2) | 0.008 (0.2) |
2 to 21⁄2 [50.8 to 63.5], Excl | 0.010 (0.25) | 0.010 (0.25) |
21⁄2 to 3 [63.5 to 76.2], Excl | 0.012 (0.3) | 0.012 (0.3) |
Cut Length Tolerance
Cold-Finished Seamless Tubes | ||
Outside diameter, In.(mm) | Cut length, in. (mm) | |
Over(+) | Under(-) | |
All Sizes | 3⁄16 [5] | 0 [0] |
Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
2 [50.8] and over | 3⁄16 [5] | 0 [0] |
Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
2 [50.8] and over | 3⁄16 [5] | 0 [0] |
These permissible variations in length apply to tubes before bending. They used to cut lengths up to 24 ft [7.3 m]. For lengths longer than 24 ft [7.3 m], the above over-tolerances shall be increased by 1⁄8 in. [3 mm] for each 10 ft [3 m] or fraction over 24 ft or 1⁄2 in. [13 mm], whichever is the lesser. | ||
Hydrostatic Test Pressures of test requirements
Hydrostatic Test Pressures | |
Outside Diameter of Tube, in. [mm] | Hydrostatic Test Pressure, psi [Mpa] |
Under 1 [25.4] | 1000 [7] |
1 to 11⁄2 [25.4 to 38.1], excl | 1500 [10] |
11⁄2 to 2 [38.1 to 50.8], excl | 2000 [14] |
2 to 3 [50.8 to 76.2], excl | 2500 [17] |
Scope of ASTM A179 Tubes
1. ASTM A179 Tubes (ASME SA179 Tubes) cover minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.
2. ASTM A179 Tubes (ASME SA179 Tubes) cover tubes 1/8 to 3 in. [3.2 to 76.2 mm], inclusive, in outside diameter. Tubing smaller in outer diameter and having a thinner wall than indicated in this specification is available. Mechanical property requirements do not apply to tubing smaller than 1/8 in, [3.2 mm] in outside diameter, or with a wall thickness under 0.015 inches [0.4 mm].
3. The values stated in inch-pound, or SI units, are regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless this specification’s “M” designation is specified in the order.
Note
The tubes are typically used in heat exchangers, condensers, heat transfer equipment, and similar pipe applications.
Mill test certificates are issued according to EN10204.3, and the tubes shall be seamless with testing conducted as per A 450 / A450M.
The application includes heat exchangers, condensers, heat transfer equipment, and similar pipe.
Packing of ASTM A179 Tubes
To protect the tubes during transportation, they are packed in wooden boxes or bundles with plastic paper and suitably protected for sea-worthy delivery. The product marking includes ASTM A179 or ASME SA179, size, heat no., lot number, and Manufacture name or logo.
Zhongzheng Stainless Steel Co., Ltd. was established in 2018 with aregistered capital of 20 million yuan. lt is a manufacturing company thatintegrates the production of special materials, manufacturing andprocessing, sales, and technology development. The company covers anarea of 2,000 square meters and has 200 employees. it has built worldclass stainless steel seamless pipe (hot piercing, cold drawing, cold rollingproduction lines, precision steel pipe production lines, and large, mediumand small-sized welded pipe production lines. The company has beencommitted to providing high performance, high precision, hightemperature-resistant, high pressure-resistant, and corrosion-resistantsolutions and technical services for industrial equipment pipeline systems.The company specializes in producing a series of steel pipes, pipe fittingsflanges, etc., such as high-temperature (nickel-based) alloys, austeniticduplex steel, urea grade stainless steel, super stainless steel, etc. Thecompany is equipped with an annual production capacity of 5,000 tons ofstainless steel seamless pipe production line, 7,000 tons of welded pipeproduction line, and 500 tons of pipe fittings production line, etc. lt canoroduce stainless steel seamless pipes with diameters ranging from Φ6 toΦ762 and wall thicknesses ranging from 0.5 to 70 mm, stainless steelwelded pipes with diameters ranging from Φ15 to Φ2200 and wallthicknesses ranging from 0.5 to 80 mm, pipe fittings, and various stainlesssteel ingots, round steel, rough pipes, etc., according to customerrequirements and in accordance with standards such as GB, ASTM, etc.WORKSHOP
Company Profile

Zhongzheng Stainless Steel Co., Ltd. is a China-based manufacturer specializing in R&D, production, and distribution of stainless steel products. Established in the early 2000s, it serves industries including construction, machinery, food/medical equipment, and energy with precision tubes, sheets, profiles, and custom components.
Contact Us
- Zhongzheng Stainless Steel Co., Ltd.
- Contact nameLaijing Bu Chat Now
- AddressRoom 104-07, Building 5, Jinghu Technology Park Huanajinghu Garden, Donglihu Subdistrict Dongli District,
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