Line pipe

March 30, 2020

Identification Method of Seamless Steel Pipe and Welded Steel Pipe

There are four main methods to distinguish welded steel pipe from seamless steel pipe: 1. Metallographic method Metallographic method is one of the main methods to distinguish welded steel pipe from seamless steel pipe. High frequency resistance welded steel pipe does not add welding material, so the weld of welded steel pipe is very narrow, if the method of rough grinding and corrosion is adopted, the weld can not be clearly seen. Once the high frequency resistance welded steel pipe is welded and not heat treated, the weld structure will be fundamentally different from the steel pipe parent material. At […]
July 16, 2019

ASTM A53 Grade A & Garde B Pipe Types and Dimensions

ASTM A53 is one of the widely used standard specification for Steel Pipe that used in the Oil and Gas as well as other process industries also. ASTM A 53 Grade B is more popular than other grades. These pipes can be bare pipes without any coating, or it may be Hot-Dipped or Zinc-Coated and manufactured by Welding or by a Seamless manufacturing process. In Oil and Gas ASTM A53 pipes are used in the structural and non-critical application. They are not used in hydrocarbon services or any services that involve pressure and temperature. Pipe Size and Types Covered in […]
January 12, 2019

STEEL PLATE AND STEEL PIPE FOR LINE PIPES

This is a §371 of International Application No. PCT/ JP2008/070726, with an international filing date of Nov. 7, 2008 (WO 2009/061006 Al, published May 14,2009), which is based on Japanese Patent Application No. 2007-290220, filed Nov. 7,2007, the subject matter of which is incorporated by reference. TECHNICAL FIELD This disclosure relates to a high-strength steel plate for line pipes, which is used for transportation of crude oil, natural gas or the like and which is excellent in anti hydrogen induced cracking (hereinafter referred to as HIC resistance), and to a steel pipe for line pipes produced by the use of […]
January 7, 2019

Corrosion Resistance of API 5L Pipeline Steel with Coating Protection

ABSTRACT The corrosion resistances of enamel-coated steel pipe in  3.5 wt% NaCl solution was evaluated and compared with those of epoxy-coated pipe using open-circuit potential, linear po- larization resistance, and electrochemical impedance spectros- copy tests. T-001c enamel slurry and GP2118 enamel powder were sprayed to steel pipe in wet and electrostatic processes, respectively. The phase composition and microstructures of the two enamels were characterized with x-ray diffraction and scanning electron microscopy (SEM). The surface roughness of enamels and their bond strength with steel substrates were quantified to understand coating quality. SEM images revealed that both types of enamel coatings have […]
December 29, 2018

API 5L Grade-B ERW Line Pipe Technical Specifications , 20″DN (508.0 mm)×WT 7.9 mm

Schedule of Requirements IFT NO. PD.2312/397-MECD/MEZ/PIPE.Materials: Line Pipe. Item No. Description of Goods Qnty Unit A. Line Pipe. As per detailed technical specifications at Section 7. Size and quantity are as follows:     A.1 DN 20″ x WT 7.9 mm API 5L Grade B, ERW 450 Meter. A.2 DN 16″ x WT 7.9 mm API 5L Grade B, ERW 5,600 Meter. Technical Specifications       IFT NO. PD.2312/397-MECD/MEZ/PIPE. API 5L Grade-B ERW Line Pipe 20″DN (508.0 mm)×WT 7.9 mm This Specification covers the manufacturer, acceptance and delivery of steel pipes with Electric Resistance Welded Longitudinal seam for gas line pipe. Said […]
December 26, 2018

A333 Grade 6 Low Carbon Steel in Pipelines – Microstructural Characterization and Hardness Properties

M. N. Ervina Efzan*, S. Kesahvanveraragu, J. Emerson   1.0 INTRODUCTION 1.1 Offshore Pipeline Material Pipelines in offshore platform are made up of various types of materials. Selection of material relies upon certain considerations such as cost, functional requirement, operating conditions of pressure and temperature, corrosion rate and so forth [1-2]. Since there are varieties of pipelines in offshore platform, material selection and those considerations are highly required. In offshore industry, metal is the highly used material that can be assorted into ferrous and non-ferrous metals [1-3]. Metals containing iron (Fe) as their premier composition are known as ferrous metals, whereas metals containing other elements are termed as non-ferrous […]
November 28, 2018

API 5L / ASTM A106 / A53 Gr. B Seamless Carbon Steel Tube / Pipe

API 5L, ASTM A53, ASTM A106 Gr. B seamless carbon steel tube / pipe is often used worldwide for general delivery purpose and supplied based on sizes in ASME B36.10M. The pipes are frequently ordered as follows:   Chemical compositions C Si Mn P S 0.17%-0.23% 0.17%-0.37% 0.35%-0.65% ≤0.03% ≤0.03% Cr Ni Cu     ≤0.25% ≤0.30% ≤0.25%       Mechanical properties Yield strength Tensile strength ≥245 MPa ≥415 MPa   Outside diameter (OD) NPS 1/4-26 (0.54”-26”, 13.7mm-660mm) Wall thickness (WT) SCH20, SCH30, SCH40, STD, SCH60, XS, SCH80, SCH120, SCH160, XXS etc. Pipe length 5.8 / 6 meters, 11.8 […]
November 7, 2018

ASTM A53 seamless and welded black and hot-dipped galvanized steel pipe

ASTM A53 covers seamless and welded black and hot-dipped galvanized steel pipe. The pipes are frequently ordered as follows: Type Black, HDG Manufacturing SMLS, ERW Grade A B Chemical compositions C Mn P S ≤0.25% ≤0.95% ≤0.05% ≤0.045% Cu Ni Cr Mo ≤0.4% ≤0.4% ≤0.4% ≤0.15% V       ≤0.08%         C Mn P S ≤0.3% ≤1.2% ≤0.05% ≤0.045% Cu Ni Cr Mo ≤0.4% ≤0.4% ≤0.4% ≤0.15% V       ≤0.08%         Mechanical properties Yield strength Tensile strength ≥205 MPa ≥330 MPa   Yield strength Tensile strength ≥240 MPa ≥415 MPa   […]