Stainless steel tubing in coils and on spools used for control lines, chemical injection lines, umbilicals as well as hydraulic and instrumentation systems.

Introduction

Grade 304 is the standard "18/8" stainless; it is the most versatile and most widely used stainless steel, available in a wider range of products, forms and finishes than any other. It has excellent forming and welding characteristics. The balanced austenitic structure of Grade 304 enables it to be severely deep drawn without intermediate annealing, which has made this grade dominant in the manufacture of drawn stainless parts such as sinks, hollow-ware and saucepans. For these applications it is common to use special "304DDQ" (Deep Drawing Quality) variants. Grade 304 is readily brake or roll formed into a variety of components for applications in the industrial, architectural, and transportation fields. Grade 304 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.

Grade 304L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components (over about 6mm). Grade 304H with its higher carbon content finds application at elevated temperatures. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

Key Properties

These properties are specified for flat rolled product (plate, sheet and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as pipe and bar in their respective specifications.

Composition

Typical compositional ranges for grade 304 stainless steels are given in table 1.

Stainless steel coiled tubes coiled tubing specification

• Standards: ASTM A269/A249 standard
• Grade: TP304, TP316L 304 316 310S 2205 825 625
• Trade Name: SS304 Coiled Tubes, SS316 Coiled Tubes, Duplex Coiled Tubes, Monel 400 Coiled Tubes, Hastelloy Coiled Tubes, Inconel coiled Tubes, 904L Coiled Tubes, Seamless Coiled Tubes, Welded Coiled Tubing
• Out diameter: 6.52-19.05mm
• Thickness: 0.2-2MM
• Tolerance: OD± 0.1mm, wall thickness: ±10%, length: ±5mm
• Length: 300-3500M/coil
• Packaging: iron pallet, wooden pallet, poly bag
• Application: refrigeration equipment, evaporator, gas liquid delivery, condenser, beverage machine
• State: soft / half hard / soft bright annealing
• Specifications: outer diameter 6.52mm-20mm, wall thickness: 0.40mm-1.5mm
• Tolerance range: diameter: + 0.1mm, wall thickness: + 10%, length: -0/+6mm
• Length: 800-3500M or according to customer requirements
• Product advantages: surface polishing and fine, uniform wall thickness, tolerance precision etc.
• Commonly Size of stainless steel coiled tube: customized as requested

Table 1. Mechanical Properties and Composition

Stainless steel coiled tubes/coil tubing common size range

Widest range of Stainless Steel 304 Seamless, Welded Pipes & Tubes