ASTM A333 Grade 7 Seamless or Welded Steel Pipe for Low Temperature

  • group nameBoiler Tubes

  • Min Order3 ton

  • brand namefushun

  • modelGrade 7

  • payment methodL/C, T/T

  • update timeThu, 09 Jul 2020 11:45:40 GMT

Paramtents

  • Heat Treatment Requirements Normalizing or Quenched and Tempered

  • Surface treatment Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting

Packging & Delivery

  • Min Order3 ton

Briefing

Produce ASTM A333 Grade 7 Seamless or Welded Steel Pipe for Low Temperature with 40-500mm diameter and 4-20mm thickness

Detailed

Quality Standard:

ASTM A333 Standard Specification for Seamless and Welded Steel Pipe for Low Temperature Service

Chemical Copmosition(%):

Grade

C

Mn

Si

P

S

Ni

Grade 7

0.19 max

0.90 max

0.13-0.32

0.025 max

0.025 max

2.03-2.57

Size Range

1.Outer Dimensions: 19.05mm-457mm 

2.Wall Thickness:2.0mm-60mm

3.Lengths: Lengths required shall be specified on order.If no definite lengths required, following practice applies:

Single Random — 17′ ~ 24′ lengths

Double Random — 36′ ~ 44′ lengths

Heat Treatment Requirements:

All seamless and welded pipe shall be treated to control their microstructure by the following methods:

1.Normalizing per ASTM A333 Standard Specification for Seamless and Welded Steel Pipe for Low Temperature Service section 4.2.1.1; section 4.2.1.2 or section 4.2.1.3

2.Quenched and Tempered per A 333/A 333M – 05 section 4.2.2.1

3.Double Normalized and Tempered per A 333/A 333M – 05 section 4.2.2.2

Delivery:

Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.

1.For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot.

2.For small lots, at least one pipe shall be tested.

3.For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.

4.Hydrostatic Test

5. Impact Test One notched bar impact test, consisting of breaking three specimens shall be made from each heat represtented in a heat-treatment load on specimens taken from the finished pipe.

 

Surface treatment: 

Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

Required Markings on Each Length (On Tags attached to each Bundle in case of Bundled Pipe):

Markings will adhere to prescribed specifications in A 999/A999M and be: Rolled, Stamped, or Stenciled (Mfrs. Option)

 

Packing

Bare packing bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

 

Delivery:

Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.

Weight of bundle – up to 5000 kg upon request of customer.

Nearest port for product export
Tianjin, Qingdao, Shanghai, Huangshi
Delivery clauses under the trade mode
FOB, CFR, CIF, CIP, CPT, DDP, DDU, DAF
Acceptable payment methods
T/T, L/C, D/P D/A
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