A333 A334 Low Temp Carbon Pipe

A333 and A334 refer to two different specifications for low-temperature carbon steel pipes.

standard:ASTM

Surface :1. Galvanized 2. Black and Color Painting

introduction

The ASTM A333 standard covers seamless and welded steel pipe for use in cryogenic environments, with ASTM A333 Grade 6 being the most commonly used specification for cryogenic service pipes. Suitable for cryogenic environments as low as -50°F (-45°C), these pipes are widely used in the oil and gas industry for transporting cryogenic fluids. This steel has good impact properties at low temperatures.
ASTM A334 specification specifies minimum wall thickness for carbon and alloy steel pipe used at low temperatures, including multiple grades of seamless and welded steel pipe. In practical applications, grade 1 and grade 6 low-temperature steel pipes are most commonly used.
Low-temperature resistant ASTM A333 seamless pipes use low-sulfur, low-phosphorus, high-purity steel and undergo calcification treatment, which can effectively reduce the low-temperature brittleness of the steel and improve the impact toughness of the product. Gnee is equipped with a 0~-100℃ cooling tank, which can conduct low-temperature impact tests in batches to ensure the quality stability of factory products.
A333 and A334 low-temperature resistant pipes are mainly used for -45℃~-195℃ low-temperature pressure vessel pipes and low-temperature heat exchanger pipes. They can also be used for fluid transportation pipes in low-temperature environments. API 5CT low-temperature resistant oil casing is mainly used for oil well extraction in extremely cold areas.
Product specification range:
Outer diameter: Φ16mm~Φ720mm; wall thickness: 2.0mm~40.0mm.

Technical Data

Impact test
Low-temperature carbon steel pipes are supplied under standardized conditions and are always subjected to Charpy impact testing at specific temperatures to ensure that the product meets the temperature range specified by the standard (carbon steel temperature limits for A333 pipes).

Grade	F°	C°
ASTM A333 Grade 1 seamless pipes	-50	-45
ASTM A333 Grade 3	-150	-100
ASTM A333 Grade 4 carbon pipe	-150	-100
ASTM A333 Grade 6	-50	-45
ASTM A333 Grade 7 carbon steel pipe	-100	-75
ASTM A333 Grade 8	-320	-195
ASTM A333 Grade 9 low temp pipe	-100	-75
ASTM A333 Grade 10	-75	-60

Steel pipes are delivered in normalized heat treated condition.
The normalizing heat treatment process of the finished product is: 900℃~930℃ heat preservation for 5~15min, air cooling.
Finished steel pipes should be subjected to ultrasonic flaw detection one by one, and the qualification level is C8. Steel pipes produced by other branch plants should be subjected to eddy current flaw testing one by one, and the qualification level is Grade B.

company advantage

Gnee Steel Company has annual sales of nearly US$1 billion and an annual export volume of more than 50,000 tons. The factory covers an area of about 35,000 square meters. The company has more than 200 employees and exports to 150 countries every year.

FAQ

Q.What's your advantage?
A.Honest business with competitive price and professional service on export process.c

Q.What product information do I need to provide?
A.You need to provide the grade, width, thickness, coating and tonnage you need to buy.

Q.Does the product have quality inspection before loading?
A.Of course, all our products are strictly tested for quality before packaging, and ungualified products will bedestroyed.we accept the third party inspection absolutely.