SH/T 1142-2020 in English

VALID

Craking C4 fraction for industrial use - Sampling in the liquid phase

Issued on:2020-12-19
Implemented on:2021-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $190.00
$185.00

Standard No:	SH/T 1142-2020
Document status:	VALID
Title in English:	Craking C4 fraction for industrial use - Sampling in the liquid phase
Title in Chinese:	工业用裂解碳四液态采样法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-12-19
Implemented on:	2021-04-01
Superseding:	SH/T 1142-2009 C4 fraction for industrial use Sampling in the liquid phase
Professional Classification:	SH-Petrochemical
Related Topics:	cleavage qb/t 1142 carbon cracker Industrial pyrolysis automatic cracking qb t 1142 d sampling py cracker Sample split peak Total Organic Carbon Sampling cracking electrician sample cracker C4 cracking carbon four density Industrial Palladium Carbon sampling method Pyrolyzer Organic carbon sampling liquid carbon Cracked naphthalene component wb four samples Dynamic sampling method state splitting Lysis liquid version Cracker-like a-cleavage a cleavage The role of pyrolysis instrument liquid carbon Use liquid or semi-liquid liquid equipment Applicable liquid liquid Lysis on ice Quarter sampler professional sampling liquid version cracked carbon four density cracking industry cracking tablet C4 cracking liquid sample Lysis dynamic sampler Sampling line Industrial liquid sample crackerpy Quarter sampler Industrial cracking carbon four sample quartile Number of Quartered Samples Quartering and Divider Method Four principles of sampling Four types of blood samples Liquid sample total carbon a-cracking method Illustration of how to use the liquid doser Four-channel dilution sampling method np40 lysis solution formula Lysis solution effect Liquid phase peak splitting coip lysis solution recipe RDA cleavage co-IP Lysis Buffer Electrolyte industry Industrial cracked carbon industry Methanol fourth edition sampling Liquid mulch industry Gas separation carbon four industries Is there any cracking of carbon four? Regulations related to thermal cracking Dissolved Inorganic Carbon Sampling liquid Cracked carbon four products sh/t 3216- 2020

Introduction

Core changes in the standard revision

Revision dimensions	2009 version	2020 version	Technical significance
Sampling system	Single style	Add 2 new closed systems	Improve VOCs control capabilities
Safety requirements	Basic specifications	Add cylinder maintenance clauses	Prevent the risk of butadiene self-polymerization
Equipment parameters	Unspecified	Working pressure ≥ 3.5MPa	Adapt to high pressure working conditions

Technical specifications for key equipment

The standard requires the use of double-valve sampling cylinders, whose technical characteristics include:

Volume ≤ 12L, with internal adjustment tube
Bursting disc device is mandatory
Corrosive samples require stainless steel valves and passivation treatment

Typical case: An ethylene plant uses 8L monel alloy cylinders for sampling. After surface passivation treatment, the sulfide detection deviation is reduced by 42%

Key points of sampling operation

Closed system operation process

Confirm that valve B is in the bypass position
Open root valve A to replace the pipeline (≥5min)
Switch valve B to the sampling position
Control the opening of valve E to adjust the sample volume
Switch back to bypass immediately after sampling

Safety warning: Butadiene samples must be analyzed within 24 hours

Standard implementation recommendations

Equipment selection plan

Operating condition type	Recommended system	Advantages
Conventional testing	Closed system one	Easy to operate
Corrosive media	Closed system 2	With bypass cleaning

It is recommended that companies establish electronic files for sampling cylinders to record the number of uses and cleaning cycles

More samples: QC/T 942-2021 JC/T 2453-2018 GB 18306-2015

Sample only — not a preview of SH/T 1142-2020

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