N-Pipe Solutions Inc. is a major supplier of Low Alloy steel Seamless pipes from India. We provide high-quality pipes to clients throughout the world. Pipes are stock in NPS/NB dimension as per ASME B36.10 in various thicknesses as per clients requirements. All pipes supplied by us are duly inspected by our in-house quality control department before being supplied to the client. All pipes are available with complete traceability and mill test certificate as per EN 10204 3.1.

We provide the best competitive prices to our clients backed by quality service.

Scope of ASTM A335 GR. P1

This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.

Referenced Documents

2.1 ASTM Standards:

A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe

E92 Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials

E213 Practice for Ultrasonic Testing of Metal Pipe and Tubing

E309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation

E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

E570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products

2.2 ASME Standard:

B36.10M Welded and Seamless Wrought Steel Pipe

General Requirements

Material furnished to this specification shall conform to the applicable requirements of the current edition of Specification A999/A999M, unless otherwise provided herein

Heat Treatment:

All pipes shall be reheated for heat treatment and heat-treated by the requirements of Table 2.

TABLE 2 Heat Treatment Requirements A

A Where ellipses (--) appear in this table there is no requirement.

Chemical Composition of ASTM A335 Gr. P1 Pipes

A New designation established in accordance with Practice E527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
D Applies to both heat and product analyses.

Mechanical properties of ASTM A335 Gr. P1 Pipes

Permissible Variations in Diameter

1) For pipe ordered to NPS [DN] or outside diameter, variations in outside diameter shall not exceed those specified in Table 6.
2) For pipe ordered to inside diameter, the inside diameter shall not vary more than +/- 1 % from the specified inside diameter.

Permissible Variations in Wall Thickness

In addition to the implicit limitation of wall thickness for pipe imposed by the limitation on weight in Specification A999/A999M, the wall thickness for pipe at any point shall be within the tolerances specified in Table 7. The minimum wall thickness and outside diameter for inspection for compliance with this requirement for pipe ordered by NPS [DN] and schedule number is shown in ASME B36.10M.

A t= Specified Wall Thikness; D=Specified Outer Diameter.

Hydrostatic test

The pipes need to be Hydro tested as per ASTM A530.

Marking on pipes

16.1 In addition to the marking prescribed in Specification A999/A999M, the marking shall include the length, the schedule number, if the pipe is ordered to a schedule number, and the heat number or manufacturer’s number by which the heat can be identified. An additional symbol “S”, if the pipe conforms to any of the Supplementary Requirements S1 to S6, The marking may be by stenciling, stamping, or rolling at manufacture’s option.
Furthermore, the marking designated in below table to indicate the test method(s) shall be included.